Sets of machines for concrete mixtures production class II
Study mode
Question of 220
1. At what distance measured horizontally from the outermost conductors for power lines with a rated voltage not exceeding 1 [kV] is the operation of a machine or technical device permissible?
a) not less than 2 [m],
b) not less than 3 [m],
c) not less than 5 [m].2. At what distance measured horizontally from the outermost conductors for power lines with a rated voltage above 1 [kV] but not exceeding 15 [kV] is the operation of a machine or technical device permissible?
a) not less than 10 [m],
b) not less than 5 [m],
c) not less than 15 [m].3. At what distance measured horizontally from the outermost conductors for power lines with a rated voltage above 15 [kV] but not exceeding 30 [kV] is the operation of a machine or technical device permissible?
a) not less than 15 [m],b) not less than 5 [m],
c) not less than 10 [m].
4. At what distance measured horizontally from the outermost conductors for power lines with a rated voltage above 30 [kV] but not exceeding 110 [kV] is the operation of a machine or technical device permissible?
a) not less than 15 [m],
b) not less than 10 [m],c) not less than 20 [m]. Concrete mix production machine sets Class II5. At what distance measured horizontally from the outermost conductors for power lines with a rated voltage above 110 [kV] is the operation of a machine or technical device permissible?
a) not less than 15 [m],
b) not less than 30 [m],
c) not less than 10 [m].6. Can workstations be organized in the danger zone under overhead power lines?
a) yes, always,
b) yes, but only after meeting additional requirements,
c) no, never.
7. What is the safe distance X for operating a machine or technical device near overhead power lines with a rated voltage of 400 [V]?
a) not less than 3 [m],
b) not less than 5 [m],c) not less than 30 [m].8. What is the safe distance X for operating a machine or technical device near overhead power lines with a rated voltage above 1 [kV] but not exceeding 15 [kV]?
a) not less than 10 [m],
b) not less than 5 [m],
c) not less than 15 [m].9. What is the safe distance X for operating a machine or technical device near overhead power lines with a rated voltage of 20 [kV]?
a) not less than 10 [m],
b) not less than 15 [m],c) not less than 30 [m].10. What is the safe distance X for operating a machine or technical device near overhead power lines with a rated voltage of 20 [kV]?
a) not less than 10 [m],
b) not less than 15 [m],c) not less than 5 [m].11. What is the safe distance X for working with a machine or technical device near overhead power lines with a rated voltage above 30 [kV] but not exceeding 110 [kV]?
a) not less than 50 [m],b) not less than 30 [m],
c) not less than 15 [m].
12. What is the safe distance X for working with a machine or technical device near overhead power lines with a rated voltage above 15 [kV] but not exceeding 30 [kV]?
a) not less than 15 [m],
b) not less than 10 [m],
c) not less than 30 [m].13. What is the safe distance X for working with a machine or technical device near overhead power lines with a rated voltage of 400 [kV]?
a) not less than 30 [m],
b) not less than 3 [m],c) not less than 40 [m].14. Work in the danger zone (overhead high voltage power line):
a) may be carried out provided that the line is disconnected from voltage, work is performed in an area limited by groundings, and at least one grounding is visible from the work location,
b) may be carried out provided that permission from the work manager has been granted,c) may not be carried out under any circumstances under electric lines in the danger zone.15. The operator must perform work at a distance X from an active overhead power line with a rated voltage of 400 [V]. He can start work if this distance is:
a) 2 [m],b) 1 [m],
c) 5 [m].
16. The operator must perform work at a distance X from an active overhead power line with a rated voltage of 20 [kV]. He can start work if this distance is:
a) 3 [m],
b) 15 [m],
c) 5 [m].17. The operator must perform work at a distance X from an active overhead power line with a rated voltage of 400 [kV]. He can start work if this distance is:
a) 50 [m],
b) 5 [m],c) 15 [m].18. If the injured person has a detectable pulse but is not breathing, then:
a) the airways should be cleared and artificial respiration started,
b) chest compressions should be performed,c) he should not be touched.19. When providing first aid to victims of an accident, it is essential to:
a) move away from the accident scene to call a doctor,b) give medication to the injured,
c) provide assistance to those in life-threatening situations.
20. When providing first aid to victims of an accident, it is essential to:
a) move away from the accident scene to call a doctor,
b) ensure your own safety,
c) provide assistance to those in life-threatening situations.21. The obligation to provide first aid to accident victims rests with:
a) only those who have medical training,
b) everyone, as part of the rescue tasks can always be performed,
c) everyone, but criminal liability always threatens for mistakes made.22. The accident victim regained consciousness after a few minutes and wants to go home. In this situation, you should:
a) persuade her to stay and call for medical help,
b) allow her to go home, recommending a visit to the doctor,c) give her something to drink and painkillers.23. First aid in a situation where a foreign body has entered the eye of the injured person consists of:
a) rinsing with clean water directing the stream from the nose outward from the eye,
b) rinsing with distilled water directing the stream into the eye,c) rinsing the eye with eye drops.24. The injured person cut their leg on an unsecured sharp element. Providing first aid in this situation is:
a) using sterile gauze, wrapping the wound with a bandage,
b) sticking a plaster directly on the wound,c) using a tourniquet.25. Suspecting spinal injury in a person who has fallen from a height and is conscious, you should:
a) seat her in a semi-reclining position,
b) not move her and wait for medical services to arrive,
c) lay her in a stable side position.26. To move away from the place where the electric wire was interrupted and the area is under voltage, you should:
a) slowly step away from this place, taking small steps, trying to maintain continuous contact of your feet with the ground,
b) quickly step away from the source of electric shock, lifting your feet high,c) run as fast as possible to a place that we assess as safe.27. First aid in the case of a first-degree burn is:
a) applying a greasy cream to the burned area,b) applying ointment to the burned area,
c) pouring cold water on the burned area.
28. During work, a high voltage power line was torn down, as a result of which a colleague was electrocuted. In this situation, the correct behavior is:
a) approach the injured person to provide first aid,
b) turn off the power source as quickly as possible,
c) call other colleagues for help with the injured person.29. We perform cardiopulmonary resuscitation until:
a) we have determined that the victim has started breathing and circulation has returned,
b) the fire brigade arrives and secures the area,c) 10 minutes have passed.30. Immediate action in the case of severe bleeding from an injured upper limb includes:
a) disinfecting the wound with salicylic alcohol,b) lowering the limb below the level of the heart,
c) applying a dressing, directly compressing the bleeding site, and raising the limb.
31. In case of a nosebleed, one should:
a) tilt the head back and place a cold compress on the neck,
b) lean the bleeding person's head forward, pinch the nostrils,
c) lay the injured person on their back.32. The first step in dealing with a victim of carbon monoxide poisoning in a closed room is:
a) the quickest possible evacuation of the injured person from that room,
b) conducting a preliminary examination,c) assessing ABC.33. First aid during seizures caused by an epileptic attack consists of:
a) securing the injured person's head from injuries,
b) placing a wooden object in the injured person's mouth to prevent biting the tongue,c) seating the injured person in a semi-sitting position and giving them something to drink.34. In case of suspected cervical spine injury in a conscious person, one should:
a) seat the injured person in a chair with a high back,
b) not allow the injured person to move their head,
c) place the injured person in a lateral position.35. The most important thing when a person is buried under earth, sand, or gravel is:
a) notifying the family,b) waiting for the ambulance to arrive,
c) locating the injured person.
36. First aid for a person with a metal rod embedded in their calf involves calling for help and:
a) moving the rod to check if the artery has been damaged,b) removing the embedded rod,
c) securing the rod to prevent movement.
37. The indication for using an AED defibrillator is:
a) no detectable breathing and pulse in the injured person,
b) severe dizziness,c) severe chest pain.38. During the operation of a machine/technical device for which you are taking the exam, the prohibited actions are:
a) performing daily technical service (OTS),
b) making structural changes to the machine/technical device,
c) changing the working tool.39. During the operation of a machine/technical device for which you are taking the exam, the prohibited actions are:
a) refueling the machine/technical device from a canister,
b) cleaning the machine/technical device using gasoline or solvents whose vapors can create flammable/explosive gas mixtures with air,
c) cleaning the machine/technical device using a product in accordance with the operating and maintenance instructions.40. The machine/technical device for which you are taking the exam may only be operated by:
a) a person with written confirmation of course completion in the form of a plastic card,
b) a person who has completed training and obtained a positive result on the test conducted by the commission appointed by the Łukasiewicz Research Network – Warsaw Institute of Technology,
c) any adult person with technical education and a driver's license of the appropriate category.41. The permissions to operate machines/technical devices for which you are taking the exam are issued by:
a) Technical Supervision Office (UDT),
b) Łukasiewicz Research Network - Warsaw Institute of Technology (SBŁ - WIT),
c) The County Office appropriate for the address of the person applying for the permissions.42. The permissions to operate machines/technical devices for which you are taking the exam:
a) are valid for 5 years from the date of issue,
b) are valid indefinitely,
c) are valid for 10 years from the date of issue.43. A person holding permissions to operate: "Sets of machines for the production of concrete mixtures class II" may, on that basis, operate:
a) sets of machines for the production of concrete mixtures and machines for spreading concrete mixtures,b) sets of machines for the production of concrete mixtures and sets of machines for the production of mineral-asphalt mixtures,
c) only sets of machines for the production of concrete mixtures.
44. An employee operating a machine/technical device for which you are taking the exam may take up work provided that:
a) they have permissions to operate this type of machine/technical device,
b) the machine/technical device has a valid UDT inspection,c) they have a valid category D driving license.45. In the event of a threat to life, health, property, or the environment caused by a machine/technical device failure, the operator:
a) immediately stops work and informs their supervisor of this fact,
b) continues working but informs their supervisor of the situation at the end of the shift,c) continues working but makes an appropriate entry in the maintenance log at the end of the shift.46. Lifting and transporting people using working equipment:
a) requires the consent of the construction manager,b) is possible, but only outside the public road area,
c) is always prohibited.
47. The employee operating the machine/technical device for which you are taking the exam has the right to refuse to work when:
a) this work requires special psychophysical fitness, and his psychophysical condition does not ensure its safe performance and poses a threat to others,
b) he has the required personal protective equipment,c) there is an overhead power line with a rated voltage of 110 [kV] at a distance of 35 meters.48. The employee operating the machine/technical device for which you are taking the exam is obliged to stop work when:
a) the work he is performing poses an immediate threat to the health or life of others,
b) he has the required personal protective equipment,c) there is an overhead power line at a distance of 35 meters.49. The employee operating the machine/technical device for which you are taking the exam is obliged to:
a) comply with the provisions of the operating and maintenance instructions for the machine/technical device,
b) independently perform all current repairs of the machine/technical device,c) always have a category B driving license.50. The person directly responsible for the safe operation of the machine for which you are taking the exam is:
a) the construction manager,b) the owner of the machine,
c) the machine operator.
51. The operator's book and qualifications for the machine/technical device you are taking the exam for are issued by:
a) Łukasiewicz Research Network - Warsaw Institute of Technology,
b) Office of Technical Inspection (UDT),c) Transport Technical Inspection (TDT).52. The obligation to use personal protective equipment:
a) arises only from internal regulations,b) does not apply on hot days,
c) arises from the operating and maintenance instructions and health and safety regulations.
53. An employee who witnesses an accident at work:
a) only needs to notify their supervisor,b) is obliged to provide assistance to the victims and then immediately leave the accident site,
c) is obliged to provide assistance to the victims, notify their supervisor, and if necessary secure the accident site.
54. We define the danger zone as:
a) a place where employees must only wear protective helmets,b) a place where work requiring specialized equipment is carried out, and the presence of people is only allowed at night,
c) a place where there are threats to the health and life of people.
55. The area that the operator should check and secure before starting work with the machine/technical device (because there are threats to the health and life of people) is called:
a) a high-risk zone,b) a dead zone,
c) a danger zone.
56. Firefighting foam can be used to extinguish fires of group:
a) A and B,
b) C and D,c) only C.57. Improper use of a snow extinguisher can result in:
a) fainting,b) burns from the extinguisher components,
c) frostbite caused by the extinguishing agent.
58. Water, fire blanket, powder extinguisher, carbon dioxide, sand are extinguishing agents that we will use to extinguish:
a) oils,
b) solids,
c) liquids.59. We can call sorbents:
a) petroleum-derived substances,b) fire blankets,
c) materials made from natural or synthetic substances that absorb liquids.
60. Group A fires concern:
a) flammable liquids,
b) solids whose normal combustion occurs with the formation of glowing coals, e.g., wood, paper, etc.,
c) flammable gases.61. Group B fires concern:
a) metals, e.g. magnesium, sodium, potassium, aluminum, titanium, etc.,
b) liquids and solid materials that melt, e.g. plastics, fuels, oils, etc.,
c) flammable gases.62. Group C fires concern:
a) gases, e.g. methane, propane, acetylene, hydrogen,
b) solids,c) flammable liquids.
63. Seeing such a pictogram you are informed about:
a) danger zone,
b) assembly point during evacuation,
c) a larger number of people in a given area.
64. While working you noticed a sign marked 'Zone 0'. It informs about:
a) a space where an explosive atmosphere exists,
b) a zone of a certain fire hazard category,c) a zone of fire load in the building.
65. The presented pictogram informs about:
a) internal hydrant,
b) set of fire protection equipment,
c) main power switch.
66. Seeing such a pictogram, you are informed about:
a) the assembly point during evacuation,
b) the emergency exit,
c) the location of first aid.
67. Seeing such a pictogram, you are informed about:
a) the location of the fire extinguisher,
b) the prohibition of using the fire extinguisher,c) the high temperature affecting the fire extinguisher.68. You see a person whose clothing is on fire and who, in panic, is running away. Your reaction is:
a) you tell him to wait in an upright position for the arrival of rescue services,b) you wave your arms or outer clothing strongly next to him to extinguish the burning clothing,
c) you try to stop him, lay him on the ground, and start extinguishing.
69. Electrical devices and installations can be extinguished using:
a) powder or snow extinguishers,
b) water,c) foam extinguishers.70. Burning fuel can be extinguished using:
a) low-octane ethylene,b) water,
c) powder, foam, or snow extinguishers.
71. Burning clothing on a person can be extinguished using:
a) snow or powder extinguisher,b) plastic material,
c) water mist extinguisher or fire blanket.
72. What obligations does an employee have when they decide to refrain from work due to health and safety regulations?
a) They must immediately notify their supervisor,
b) They should organize work for others,c) They have no obligations in this situation.73. How can an operator prevent hazards in the workplace?
a) By not reporting faults in machines,b) By ignoring health and safety rules,
c) By using personal protective equipment to minimize risk.
74. It is not permissible to position a workplace directly under active overhead power lines or at a horizontal distance from the outermost wires of less than:
a) for all voltages - 1 [m] from the power line,
b) for lines: 1 [kV] - 3 [m], 15 [kV] - 5 [m], 30 [kV] - 10 [m], 110 [kV] - 15 [m], 400 [kV] - 30 [m],
c) for lines: 1 [kV] - 1 [m], 15 [kV] - 3 [m], 30 [kV] - 5 [m], 110 [kV] - 10 [m].75. How does the operator know what personal protective equipment is required for a given machine/technical device?
a) The choice of personal protective equipment depends on the opinions of colleagues at work,
b) Information about necessary personal protective equipment is included in the operating and maintenance manual of the machine,
c) The operator must independently choose the appropriate protective measures.76. The operator should refuse to perform the task when:
a) the work is inconsistent with the intended use of the machine/technical device,
b) the work is being performed at night,c) the work requires familiarization with the location of underground and overhead utilities.77. The operator can prevent hazards while operating the machine/technical device by:
a) limiting the use of personal protective equipment,b) inattention and routine,
c) following health and safety rules and adhering to operating instructions.
78. Which of the following situations is unacceptable during the use of the machine/technical device?
a) Operating the machine without supervision,
b) Unauthorized persons being in the danger zone caused by the operation of the machine/technical device,
c) Reporting faults directly to the supervisor.79. An accident at work is considered to be:
a) a long-term event related to the work being performed, caused by an internal reason, resulting in equipment damage,b) a sudden event unrelated to the work being performed, caused by an external reason, resulting in injury or death,
c) a sudden event related to the work being performed, caused by an external reason, resulting in injury or death.
80. A fatal accident at work is considered to be an accident in which death occurred:
a) more than 6 months after the date of the accident,b) only at the moment of the accident,
c) within a period not exceeding 6 months from the date of the accident.
81. How can the operator prevent hazards associated with the operation of concrete mixing machine teams?
a) By ignoring the operating instructions to speed up the production process,b) By increasing the number of machine operating cycles and reducing maintenance time,
c) By regularly checking the technical condition of the machines, maintaining cleanliness at the workplace, and using personal protective equipment.
82. Which of the following actions are prohibited when working with a concrete mixing machine team?
a) Using a faulty machine, touching moving parts, leaving the machine unattended,
b) Reporting faults to the supervisor before starting work,c) Stopping the concrete mixing node before leaving the workplace.83. Health and safety regulations require:
a) securing the working machine during breaks in its operation against accidental activation by unauthorized persons,
b) performing a warranty inspection of the working machine before one year from its purchase,c) scrapping the old working machine within the time specified in its operating and maintenance instructions, while complying with hazardous material disposal requirements.84. In the event of a person being electrocuted:
a) do not touch the victim until the power source is disconnected,
b) immediately begin resuscitation, regardless of whether the power source has been disconnected,c) it is recommended to use any tools to disconnect the power, regardless of their actual purpose.85. In the event of a person being buried under earth or sand:
a) they should be dug out as quickly as possible regardless of one's own safety - it's about their life,b) we always calmly wait for rescue services - any attempt to help would be too dangerous,
c) they should be dug out as quickly as possible, as long as it is safe for the person undertaking the rescue action.
86. Seeing a person whose clothes are on fire, you should first:
a) use a fire extinguisher, preferably a snow one, to extinguish the burning clothing, and then try to quickly remove the fused clothing,b) leave the victim standing to facilitate air access and extinguish the flames faster,
c) cut off the air supply by rolling the victim or wrapping them in a fire blanket, wet clothing, or a wet blanket.
87. Cardiopulmonary resuscitation (CPR) is performed:
a) only in the case of fainting and minor injuries, to improve blood circulation,b) when the victim is breathing but unconscious, with no contact,
c) when the victim is not breathing and there is no detectable pulse. For a person who is not a professional rescuer, lack of breathing is a sufficient basis to start resuscitation.
88. An employee has the right to refrain from performing work due to health and safety regulations, notifying their supervisor immediately if:
a) the working conditions do not pose a threat, but are too difficult for them,
b) the working conditions pose a direct threat to health or life,
c) the work they are performing has not been reported to the construction supervision.89. Physical factors generating hazards in the workplace are:
a) lack of or inadequate training for employees,b) lack of appropriate medical examinations for the employee,
c) spilled lubricants, oils, and fuels.
90. Working with a machine/device is not allowed when:
a) the second operator has not reported an upcoming inspection,
b) it is malfunctioning,
c) its repair was carried out after dark.91. Work near overhead power lines:
a) is possible without meeting additional requirements provided that certain distances depending on the rated voltage of the line are maintained,
b) always requires double grounding of the line,c) always requires power to be turned off in the line.92. The operator is obliged to refuse to work if:
a) the working machine is defective,
b) there is no site manager or any other authorized person for supervision at the work site,c) they would have to work under power lines, and the voltage in them has been turned off and the line grounded.93. The danger zone from a machine/technical device is:
a) a place where the machine/technical device cannot be used,b) always the entire fenced construction site,
c) a place where there are hazards to health or life of people.
94. Accidents at work resulting from the poor technical condition of the working machine may involve, for example:
a) injury to a limb, torso, or head,
b) failure of the drive system,c) damage to the equipment.95. Unacceptable behaviors are:
a) working after dark in a well-lit place, with full concentration of the operator,b) performing daily maintenance of the machine after dark,
c) working with a defective machine and working under the influence of alcohol.
96. The basic hazards that may occur in the workplace of a concrete mix production machine set are:
a) sharp and moving machine parts, spilled lubricants or oils, chemically active materials, and hot machine elements,
b) too few workers operating the machines,c) performing daily machine maintenance after dark.97. Prohibited activities during the operation of a concrete mix production machine set are:
a) carrying out repairs after work is finished,b) operating machines only by persons with appropriate qualifications,
c) operating technically defective machines and allowing unauthorized persons in the danger zone.
98. Prohibited activities during the operation of a concrete mix production machine set are:
a) operating machines by unqualified persons,
b) reporting noticed defects to the supervisor before starting work,c) operating machines by persons with appropriate qualifications.99. The basic safety rules for operating a concrete mix production machine set can be defined as:
a) the operator must have appropriate qualifications, be sober, well-rested, dressed in work clothing and a safety helmet, and also check the technical condition of the unit before starting work,
b) the operator only needs to ensure the cleanliness of the workplace, while the technical condition of the machines is checked by the maintenance department,c) the operator is obliged to perform self-repairs of the unit in case of minor defects.100. The basic duties of an employee in terms of occupational health and safety are:
a) not being late for work, finishing on time, confirming presence at work in the manner accepted by the employer,b) enforcing labor code regulations regarding their rights, including payment for overtime worked,
c) adhering to health and safety regulations, taking care of the condition of machines and tools, maintaining order in the workplace, and using personal protective equipment.
101. In the case of a person electrocuted, after disconnecting the power source, one should:
a) check the condition of the victim, and if necessary: call for help, clear the airways, perform resuscitation, and use an AED if available,
b) leave the victim alone if they have regained consciousness, without further actions,c) move the victim to another location as quickly as possible.102. When a person buried under earth or sand is partially dug out, one should:
a) clear the airways as quickly as possible,
b) quickly dig out the left arm to check for a pulse,c) focus on digging out the lower parts of the victim's body.103. After extinguishing flames on a person with burns and calling for help, one should:
a) cool the burned areas with cold water for 10-20 minutes, first removing any melted clothing,
b) cool the burned areas with cold water for 10-20 minutes, without removing any melted clothing,
c) use a snow extinguisher to cool the burn area.
104. Seeing such a pictogram, you are informed about:
a) a location where an external automatic defibrillator is available,
b) a location where a first aid kit is available,c) a location for performing AED.105. Properly performed cardiopulmonary resuscitation (CPR) consists of:
a) clearing the airways, then compressing the chest at a rate of 100-120 times per minute to a depth of 5–6 [cm] and performing 2 rescue breaths after every 30 compressions (breaths are not mandatory),
b) clearing the airways, then compressing the chest at a rate of 30-60 times per minute to a depth of 1–3 [cm] and performing 2 rescue breaths after every 15 compressions (breaths are mandatory),c) connecting an external automatic defibrillator (AED) and following its instructions; CPR is not performed without an AED.106. The BIOZ plan means:
a) plan of Safe Health Protection Instructions,b) plan of Safety and Resource Specification,
c) plan of Safety and Health Protection.
107. Preparing the area of the mixture production plant for customer service involves:
a) preparing driver service points,b) introducing a ban on the entry of passenger cars,
c) designating maneuvering roads.
108. In order to prepare the area of the production plant for vehicle traffic, the following is introduced:
a) restrictions on vehicle width,b) restrictions on vehicle weight,
c) speed limits for vehicles and designating directions of movement.
109. Documentation that contains all information about the organization of the production site, which is a mixture production plant, is:
a) health and safety diagram,
b) safety and health protection plan,
c) site instruction.110. The staff of the production plant and individuals present on its premises should only move:
a) behind vehicles moving within the plant,
b) in designated zones,
c) with the assistance of the plant manager.111. Concrete mix is:
a) completely and uniformly mixed concrete components that are still in a state allowing for compaction,
b) only cement mixed with water,c) concrete that is already set and hardened.112. The limitation that must be considered when selecting the maximum grain size of aggregate for concrete is:
a) the grain of the aggregate should not exceed 1/3 of the smallest dimension of the element's cross-section,
b) the aggregate should only have a fine fraction of sand,c) the grain of the aggregate cannot be smaller than 1/3 of the thickness of the element.113. Frost resistance of concrete is improved by:
a) plasticizing admixtures,
b) air-entraining admixtures,
c) accelerating admixtures.114. The mixing time of concrete components depends on:
a) the type of concrete mixer and the type of concrete being prepared,
b) only the amount of cement added,c) solely on the ambient temperature.115. The effectiveness of mixing concrete components is not influenced by:
a) the type of mixers,b) mixing time,
c) the temperature of the mix.
116. The largest percentage share in the concrete mix:
a) is made up of chemical additives,
b) is aggregate,
c) is cement.117. The main difference between the concrete mix and concrete is that:
a) the concrete mix contains only water and cement, while concrete also contains aggregates,
b) the concrete mix is still in a liquid state, while concrete is already set and hardened,
c) the concrete mix consists solely of fine aggregate with water, while concrete contains only cement and sand.118. The concrete mix used for thin-walled elements should have a higher proportion of mortar in order to:
a) facilitate their precise filling,
b) increase the amount of cement in the mix and achieve faster setting,c) reduce the need for adding water.119. The main function of plasticizing additives in the concrete mix is to:
a) increase resistance to low temperatures,
b) increase the fluidity of the mix and reduce the amount of water needed,
c) accelerate the setting and hardening process.120. Longer mixing times are required for:
a) ordinary concretes used on large surfaces,
b) concretes with a low water/cement ratio and high-strength concretes (HSC),
c) concretes with a high water/cement ratio and low strength.121. The effectiveness of mixing concrete ingredients depends on:
a) solely on the size of the aggregate,
b) on the time and speed of mixing and the type of mixers,
c) solely on the ambient temperature.122. The concrete production process ends when:
a) a mixture with the assumed consistency according to the recipe is achieved,
b) all ingredients have been weighed,c) the aggregate has been fed into the concrete mixer.123. The precise dosing of raw materials in the concrete plant is the responsibility of:
a) the aggregate dispenser, cement dispenser, and water dispenser,
b) the concrete mixer,c) the device receiving the concrete.124. The concrete mixer in the concrete plant is used for:
a) transporting ready concrete to the construction site,
b) mixing weighed portions of aggregate, cement, water, and additives,
c) weighing individual components of the concrete mixture.125. The set of machines for producing the concrete mixture requires the use of scales for aggregate, cement, water, and additives:
a) only when high-quality bridge concrete is produced,
b) to ensure precise dosing of all mixture components,
c) to determine the weight of the finished mixture.126. The component of the concrete mix responsible for binding all materials into a uniform mass is:
a) cement,
b) sand,c) water.127. The number of admixtures that can be used simultaneously in surface concrete is:
a) any number, if it improves quality,b) only one,
c) a maximum of three.
128. The use of accelerating admixtures in the concrete mix causes:
a) a decrease in initial strength and an increase in final durability of the concrete,
b) an increase in initial strength without deteriorating final strength,
c) a delay in the setting time so that the concrete can be transported over long distances.129. Polypropylene fibers are most commonly used in:
a) foundations, to increase their thermal conductivity,
b) floors, to improve compressive strength and quality of the concrete,
c) facades, to reduce their weight.130. The use of pozzolanic cement causes
a) a decrease in the water resistance of the concrete,b) a shortening of the setting time,
c) an increase in the water resistance of the concrete.
131. The w/c ratio refers to:
a) the proportion of water to cement,
b) the proportion of water to aggregate,c) the proportion of downtime to continuous working time.132. Changing the class of cement mainly affects:
a) the specific weight of concrete,b) the mixing time of the mixture,
c) the change in compressive strength.
133. Changing the class of cement to a lower one mainly affects:
a) the decrease in compressive strength,
b) the mixing time of the mixture,c) the specific weight of concrete.134. Changing the class of cement to a higher one mainly affects:
a) the specific weight of concrete,
b) the increase in compressive strength,
c) the mixing time of the mixture.135. The maximum grain size of aggregate for concrete for beams, slabs, and reinforced concrete columns:
a) does not depend on the spacing between the reinforcement bars,
b) is no more than 3/4 of the minimum spacing between the reinforcement bars,
c) is equal to the minimum spacing between the reinforcement bars.136. The use of an aerating additive improves:
a) the pumpability of the concrete mix,
b) the frost resistance of the concrete,
c) the flexibility of the concrete.137. The use of sealing additives:
a) reduces the absorbency of the concrete,
b) increases the absorbency of the concrete,c) improves the buoyancy of the concrete.138. A cement paste is called:
a) a mixture of cement and water,
b) a mixture of cement and chemical additives,c) a mixture of cement and aggregates.139. An aggregate of pebbles is called:
a) stones coated with tar,
b) fragments of rocks that have moved in rivers,
c) slate aggregate.140. To make a concrete mix, one does not use:
a) soft water,
b) salty water,
c) washed sand.141. When selecting aggregate, one should strive for:
a) the aggregate to be as coarse as possible,
b) to use only one fraction of aggregate,c) the aggregate to be as fine as possible.142. Increasing the share of fine fractions causes:
a) an increase in the demand for cement and water,
b) a decrease in the demand for cement and water,c) a decrease in the demand only for cement.143. One of the obligations of the concrete producer is:
a) to conduct factory production control,
b) to keep production recipes confidential,c) to maintain a factory recipe book.144. If there is cement in the silo and the weighing has been interrupted, one should immediately:
a) change the working recipe,
b) activate the aeration device,
c) flush the scale with water.145. The connection of the cement paste with the aggregate occurs:
a) in the aggregate and additive dispensers,
b) in the mixer,
c) in the cement paste silo.146. Weighing aggregate for the production of concrete mixtures occurs:
a) in aggregate bins,b) on a loader equipped with a bucket scale,
c) on a weighing conveyor.
147. During the production of concrete mixture, moisture control is performed using sensors that are distributed:
a) in aggregate bins and the mixer,
b) on conveyors and pipelines,c) in additive bins.148. Sets of machines for the production of concrete mixtures can be controlled:
a) via mechanical control linkages,b) via automatic settings of the infrared controller,
c) using a touch control panel.
149. The basic preparatory activities for the production of concrete mixtures are:
a) checking the weather forecast on the day of production,
b) checking the necessary quantities of components for production,
c) verifying the number of transport means for receiving the mixture.150. A necessary action after the production process is completed is:
a) removing the remnants of the concrete mixture from the mixer,
b) marking with signs "Do not turn on - machine is idle",c) cleaning the plant area from aggregate remnants.151. Concrete mix is:
a) a mixture mainly composed of aggregates and binder, from which bituminous surfaces are made,b) completely and uniformly mixed components of concrete after the cement binding process is completed,
c) completely and uniformly mixed components of concrete that are still in a state allowing compaction by a selected method.
152. We call concrete:
a) a material obtained by mixing cement, aggregate, water, and possible admixtures and additives, which has already acquired its properties as a result of cement hydration,
b) a material obtained by mixing cement, aggregate, water, and possible admixtures and additives, which is still in a state allowing compaction,c) a mixture mainly composed of aggregates and binder, from which bituminous surfaces are made.153. Which of the listed elements are not part of the hydraulic system:
a) hydraulic lock, hydraulic oil tank,
b) starter, alternator,
c) pump, distributor, actuator.154. The hydraulic lock in a machine is:
a) a valve that protects against uncontrolled movement of an element located in a given line,
b) a valve responsible for controlling the entire hydraulic system,c) a closure of the hydraulic oil inlet at its tank.155. The change in hydraulic oil pressure into mechanical motion is caused by:
a) the hydraulic pump system,b) hydraulic distributor,
c) hydraulic actuator and hydraulic motor.
156. The pressure in the hydraulic system is generated by:
a) hydraulic actuator,
b) hydraulic pump,
c) hydraulic motor.157. Directing the flow of hydraulic oil to individual systems is carried out by:
a) hydraulic distributor,
b) hydraulic lock,c) relief valve.158. The safety valve protects the hydraulic system from:
a) excessive pressure increase,
b) air in the hydraulic system,c) overheating of the hydraulic oil.159. The relief valve in the hydraulic system is responsible for:
a) venting the system,
b) limiting the maximum working pressure in a given circuit,
c) maintaining a constant position of the working tool.160. If the pressure in the hydraulic system increases excessively, the excess oil will be directed to:
a) hydraulic oil tank,
b) hydraulic oil filter,c) distributor.161. The flow and direction of hydraulic fluid in the system are regulated by:
a) hydraulic valves,
b) hydraulic pumps,c) hydraulic motors.162. Elements of the system, such as actuators and hydraulic motors, convert hydraulic energy into:
a) electrical energy,b) pressure in the tank,
c) mechanical energy.
163. To measure the mass of mixed components, scales are most commonly used:
a) balance scales,
b) strain gauge scales,
c) laboratory scales.164. To improve the transport of material from silos, the following are used:
a) exhaust blowers,b) mechanical actuators,
c) trailer vibrators.
165. An increase in the load on the mixer motor will cause:
a) an increase in current in the motor power line,
b) a change in the direction of conveyor operation,c) a decrease in the temperature of the mixing water.166. The use of dryers in a pneumatic installation:
a) is an additional source of water ,
b) reduces the likelihood of failures and the occurrence of corrosion in the system,
c) reduces the humidity of the aggregate fed to the mixer.167. In order to protect individual circuits of the electrical system from the effects of short circuits and overloads in the machine sets for producing mixtures, the following are used:
a) lightning protection systems,b) circuit breakers,
c) undervoltage releases.
168. Gel batteries, which are part of the electrical system, do not require:
a) charging with a rectifier,
b) electrolyte replenishment,
c) replacement in case of housing damage.169. Stationary batteries, which are part of the electrical systems of the mixture production sets, provide:
a) smooth start-up of individual working subassemblies in the event of a main power failure,
b) continuity of control over technological processes in the event of a main power failure,
c) the possibility of connecting a device with higher power to the electrical circuit.170. Electrical systems of machines and devices should be equipped with a device that causes emergency stop in at least the following quantity:
a) three devices causing emergency stop, in accordance with the European machinery directive,
b) one device causing emergency stop, in accordance with the European machinery directive,
c) two devices causing emergency stop placed on both sides of the machine, in accordance with the European machinery directive.171. The emergency stop device of the machine is a component of:
a) the electrical system,
b) the fuel system,c) the drive system.172. The lines transmitting weighed portions of raw material for the production of concrete mix create:
a) a dosing belt feeder, a screw feeder, and a 'Skip' type cart,
b) tanks and storage devices for raw material,c) an aggregate buffer with a flap, an aggregate and cement distributor.173. The maximum size of a single batch of concrete mix is limited by:
a) the size of the mixer available,
b) the type of mix being produced,c) the time for producing the batch.174. The main elements of the control system ensuring the correct course of production in concrete mix plants are:
a) transport devices and drives,
b) scales and dosing devices, monitoring systems for parameters and mixing time,
c) manometers and indicators.175. The operator's cabin equipment should include:
a) an advanced set of tools and measuring instruments,b) critical spare parts for the electrical and pneumatic installations,
c) an operating and maintenance manual, a first aid kit, a fire extinguisher.
176. Devices included in the concrete mix production plant are:
a) concrete transport pumps and cooling devices,b) machines for crushing and processing aggregates,
c) raw material storage devices, raw material transport devices, concrete plant, devices receiving concrete.
177. The frequency and scope of periodic maintenance of the machine/technical device for which you are taking the exam:
a) are included in the IBWR documentation,b) is determined by the owner of the machine/technical device,
c) are included in the operating and maintenance manual of the machine.
178. The operating and maintenance manual of the machine/technical device is:
a) a set of information necessary for the safe operation of the machine/technical device issued by the health and safety services on the construction site,b) a set of information necessary for the safe operation of the machine/technical device, which includes among others IBWR,
c) a set of information necessary for the safe operation of the machine/technical device issued by the manufacturer of the machine/technical device.
179. The operator of the machine/technical device for which you are taking the exam is not allowed to:
a) use the machine/technical device contrary to its intended purpose,
b) during operation, check the technical condition of the machine/technical device,c) make any repairs or maintenance.180. A symptom of too low a level of hydraulic oil may be:
a) uneven operation of the diesel engine,b) loud operation of the starter,
c) "jerky" intermittent movement of hydraulic actuators.
181. Operating and maintenance instructions for the machine/technical device:
a) is established by the owner or user of the machine,b) is used to record information about faults,
c) includes, among other things, information about hazards during the operation of the machine/technical device.
182. The CE Declaration of Conformity is a document:
a) confirming that the product was manufactured in the countries of the European Union,b) issued by institutions that test machines for resistance to weather conditions,
c) in which the manufacturer confirms that their product meets all applicable EU requirements regarding safety, health protection, and the environment.
183. Information regarding the use of personal protective equipment and ways to limit the occupational risk the operator can find:
a) in the service book,b) in the CE Declaration of Conformity,
c) in the operating and maintenance instructions for the machine/technical device.
184. The operating and maintenance instructions for the machine/technical device:
a) are developed by the manufacturer of the machine/technical device or the entity that introduces the machine/technical device to the market,
b) are created by institutions that conduct testing and accreditation of prototypes of machines/technical devices before allowing them for serial production,c) are created by the construction manager based on information from the manufacturer.185. The operating and maintenance instructions for the machine/technical device:
a) do not matter where they are located, the most important thing is that the owner of the machine has them in case of resale of the machine,b) should be located in the office along with the company's documentation and be available in case of inspection,
c) should be located in the machine or with the device, treated as part of the machine/technical device and be available at any time.
186. Identification data of the machine/technical device:
a) are located on the nameplate of the machine/technical device, additionally they may be in the marking places described in the manual,
b) due to their importance are always printed in red,c) should be noted on the inner side of the protective helmet assigned to the given machine/technical device.187. To minimize the risk of machine/technical device failure, the operator should:
a) perform maintenance activities only when the machine/technical device stops working,
b) regularly visually assess the condition of the machine/technical device and report any noticed irregularities,
c) use the machine/technical device until the failure becomes serious.188. The operator uses the operating and maintenance manual of the machine or device to:
a) record all faults of the machine or device noticed during operation,
b) learn the technical specifications, health and safety rules, and methods of repairing faults,
c) record the hours worked and fuel consumption by the machine in it.189. The operational part of the operating and maintenance manual of the machine or device includes:
a) a detailed description of the construction and operation of all elements of the machine/technical device,b) a catalog of spare parts,
c) instructions regarding, among others, controlling the machine/technical device.
190. The operating and maintenance manual must always be present with the machine/technical device because:
a) its absence may be the reason for the inspector not allowing the machine to operate,
b) it is necessary for periodic technical inspections,c) it minimizes the risk of it being lost.191. After the production is completed, the service of conveyor belts requires:
a) checking the power supply voltage of the conveyors,
b) cleaning and checking the condition of the belts and adjusting their tension when required,
c) setting the belts in the parking position.192. The operator before starting service activities after the production is completed should:
a) turn off only the main power supply,
b) hang a sign "Maintenance Work",
c) switch the control computer to service mode and start maintenance without turning off.193. Oils marked 70W, 85W, 80W-90 are:
a) gear oils,
b) engine oils,c) brake oils.194. Before starting work, the employee is required to check among other things:
a) the expected weather for the current day,b) the oil stock in the warehouse,
c) the correctness of the installation and operation of collective protection measures.
195. Service activities related to the pneumatic installation include:
a) regularly adjusting the safety valve,
b) checking and possibly removing water from the installation,
c) adding water to the system.196. The maintenance activities before starting work include:
a) ordering materials (aggregate, sand, etc.) needed for the given workday,b) performing a work cycle without materials,
c) visual inspection and lubrication.
197. In case of the need to dismantle the cover/protection to carry out maintenance, it is prohibited to:
a) start working with the machine without installing the cover/protection,
b) record such a fact in the documentation,c) reinstall the cover/protection.198. The wear of the feeder screw manifests as:
a) an increase in the diameter of the screw,
b) a decrease in the diameter of the screw,
c) a decrease in the length of the screw.199. The most common faults of belt feeders include:
a) problems with the bearing of rollers and fraying and breaking of the belt,
b) cracking at the joints of the belt conveyor and cracking of the frame,c) rotating the belt.200. Before starting the production process, it is necessary to, among other things:
a) check the scales at maximum load,b) record the initial scale readings,
c) tare the scales.
201. When changing hydraulic oils, it is necessary to:
a) always use only biodegradable oils,
b) use only types of oils recommended by the machine manufacturer,
c) use any type of oil.202. To ensure the technical efficiency of the working machine, it is necessary to:
a) follow technical service and maintenance according to the operating and maintenance instructions,
b) operate the machine/device only under full load,c) operate the machine/device not exceeding 50% of the permissible load.203. On the construction site, empty containers of lubricants, oil filters, and used oils should be:
a) placed in a properly marked container for hazardous waste,
b) thrown into any waste container,c) thrown into a mixed waste container.204. Stickers (pictograms) located on the machine/device serve to:
a) inform about the prohibition of approaching the machine/device,
b) convey important information about safety and the use of the machine/device,
c) indicate places where one can stay without any risk.205. Lubrication points in the machine should be serviced:
a) always after 10 hours of operation,
b) according to the operating and maintenance instructions of the machine,
c) during all breaks in operation.206. Before starting work on a new type of machine/technical device, the operator should:
a) perform a periodic inspection,b) conduct a trial operation,
c) familiarize themselves with the operating and maintenance instructions for the machine/technical device.
207. OTC service is:
a) round-the-clock technical service,
b) daily technical service,
c) temporary technical service.208. The basic types of services are:
a) visual service, active, passive,
b) daily, periodic, warehouse, transport service,
c) round-the-clock, multi-seasonal, annual, technological service.209. The activities performed by the operator as part of daily service during work are:
a) auditory control of the machine's operation and observation of indicators,
b) cleaning the machine,c) replenishing operating fluids and daily lubrication.210. If the manufacturer has provided for operational run-in, it should be carried out:
a) without load,b) with maximum load,
c) with the load recommended in the operating and maintenance instructions for the machine/technical device.
211. The rods of hydraulic cylinders, during the technical service of the storage machine, should be:
a) disassembled and cleaned,
b) protected against corrosion,
c) taken apart and the seals replaced.212. During longer storage of the machine, the fuel tank should be:
a) filled to 1/3 of its capacity and left open,b) empty to avoid fire hazards,
c) filled to the top to prevent condensation of water vapor inside the tank.
213. During daily operation of the machine, the condition of should be checked:
a) connections and tightness of the hydraulic system,
b) tools and equipment,c) the value of working pressure in the hydraulic system.214. If the machine's engine has not been running for a long time during daily operation, it should be:
a) check the oil level and other operating fluids,
b) replace the fuel pre-filter,c) start the engine and gently increase the RPM to reach the operating temperature faster.215. Information regarding faults, their codes, and methods of removal can be found in the document titled:
a) construction machine book,
b) operating and maintenance manual,
c) daily report.216. The purpose of lubrication in working machines is:
a) to increase the engine's rotational speed,b) to raise the temperature of cooperating elements,
c) to reduce friction.
217. The frequency of performing periodic technical service depends on:
a) the number of hours worked (engine hours),
b) the date of production of the machine,c) the number of completed working cycles.218. Activities performed as part of daily technical service (OTC) carried out during the operation of the machine include:
a) observation of control and measuring instruments and monitoring the proper operation of the machine using sight, hearing, and smell,
b) observation only of control and measuring indicators such as: oil pressure, engine temperature, hydraulic oil temperature,c) primarily sensory control of the proper functioning of the machine's working system.219. We distinguish, among others, the following types of technical services:
a) breaking-in, daily, periodic, seasonal, storage, emergency, night,
b) transport, breaking-in, daily, periodic, seasonal, storage,
c) transport, breaking-in, storage, service-repair (ON), catalog.220. We perform technical services in order to:
a) ensure quiet operation of the machine or technical device,