Topic 3. Malfunctions and conditions prohibiting vehicle operation

1. A vehicle may not be operated if:

1. The remaining tread depth of the tires of a passenger car is 1.8 mm.
2. The hydraulic brake system is not leak-tight.
3. In both cases.

Correct answer: The hydraulic brake system is not leak-tight. ABC

In tests: ABC 29

2. A vehicle may not be operated if:

1. The remaining tread depth of the tires of a truck is 1.6 mm.
2. The pressure gauge of the pneumatic brake system does not operate.
3. In both cases.

Correct answer: The pressure gauge of the pneumatic brake system does not operate. ABC

In tests: ABC 45

3. A vehicle may not be operated if:

1. There is movement in steering parts or assemblies that is not provided for by the design, or threaded connections are not tightened.
2. A fire extinguisher is missing from a truck.
3. In both cases.

Correct answer: In both cases. ABC

4. A vehicle may not be operated if:

1. The exterior lighting devices do not operate in the prescribed mode.
2. The remaining tread depth of the tires of a motorcycle is 0.6 mm.
3. In both cases.

Correct answer: In both cases. ABC

In tests: ABC 20

5. A vehicle may not be operated if:

1. The rear fog lights are connected to the vehicle’s brake lights.
2. The engine coolant temperature gauge does not operate.
3. In both cases.

Correct answer: The rear fog lights are connected to the vehicle’s brake lights. ABC · D/T

In tests: ABC 54, D/T 44

6. A vehicle may not be operated if:

1. The engine operates intermittently.
2. The tires have localized damage exposing the tire cord.
3. The interior lighting devices of a passenger car do not operate.
4. In all of the listed cases.

Correct answer: The tires have localized damage exposing the tire cord. ABC

In tests: ABC 41

7. A vehicle may not be operated if:

1. A motorcycle without a sidecar does not have an emergency warning triangle.
2. The tires do not correspond to the vehicle model in size or permitted load capacity.
3. In both cases.

Correct answer: The tires do not correspond to the vehicle model in size or permitted load capacity. ABC

In tests: ABC 48

8. A vehicle may not be operated if:

1. Even one wheel-fastening bolt is missing.
2. Tires with different tread patterns are installed on the same axle.
3. In both cases.

Correct answer: In both cases. ABC · D/T

In tests: ABC 52

9. A vehicle may not be operated if:

1. The head restraints provided by the vehicle’s design are missing.
2. New and retreaded tires are installed on the same axle.
3. In both cases.

Correct answer: In both cases. ABC · D/T

In tests: ABC 15, D/T 39

10. A vehicle may not be operated if:

1. The content of harmful substances in the exhaust gases exceeds the limits established by the legislation of the Republic of Armenia.
2. The footrests provided by the motorcycle’s design are missing.
3. In both cases.

Correct answer: In both cases. ABC

In tests: ABC 47

11. A vehicle may not be operated if:

1. The engine crankcase ventilation system is not leak-tight.
2. The engine fuel system is not leak-tight.
3. In both cases.

Correct answer: In both cases. ABC · D/T

In tests: ABC 50

12. A vehicle may not be operated if:

1. The engine crankcase ventilation system is not leak-tight.
2. Winter and non-winter tires are installed on the same axle.
3. In both cases.

Correct answer: In both cases. ABC · D/T

In tests: ABC 2, D/T 9

13. A vehicle may not be operated if:

1. The windshield washers provided by the vehicle’s design do not operate.
2. The engine’s external noise level exceeds the limits established by the standard.
3. In both cases.

Correct answer: In both cases. ABC · D/T

In tests: ABC 17

14. A vehicle may not be operated if:

1. The engine operates intermittently.
2. The rear fog lights are not connected to the brake lights.
3. The windshield washers provided by the vehicle’s design do not operate.
4. In all of the listed cases.

Correct answer: The windshield washers provided by the vehicle’s design do not operate. ABC · D/T

In tests: ABC 8

15. A vehicle may not be operated if:

1. Items or objects that may cause injury to road users are installed on the vehicle.
2. The horn does not operate.
3. In both cases.

Correct answer: In both cases. ABC · D/T

In tests: ABC 51, D/T 22

16. A vehicle may not be operated if:

1. There is excessive play in the connections between the motorcycle frame and the sidecar frame.
2. Yellow-light fog lamps are installed at the front.
3. In both cases.

Correct answer: There is excessive play in the connections between the motorcycle frame and the sidecar frame. ABC

In tests: ABC 19

17. A vehicle may not be operated if:

1. A first-aid kit is missing from a truck.
2. White reflectors are installed at the front.
3. In both cases.

Correct answer: A first-aid kit is missing from a truck. ABC

In tests: ABC 55

18. A vehicle may not be operated if:

1. A first-aid kit is missing from a motorcycle with a sidecar.
2. The trailer support-coupling device is defective.
3. In both cases.

Correct answer: In both cases. ABC

In tests: ABC 27

19. A vehicle may not be operated if:

1. The seat belts provided by the vehicle’s design do not operate.
2. Items or objects that restrict the driver’s field of vision are installed within the driver’s field of view.
3. In both cases.

Correct answer: In both cases. ABC · D/T

In tests: ABC 49

20. A vehicle may not be operated if:

1. Changes or modifications have been made to the vehicle’s design without permission from the vehicle registration authority.
2. Yellow-light turn signals are installed at the front.
3. In both cases.

Correct answer: Changes or modifications have been made to the vehicle’s design without permission from the vehicle registration authority. ABC · D/T

In tests: ABC 32, D/T 49

21. A vehicle may not be operated if:

1. A motor vehicle used for practical driving instruction does not have the required identification sign.
2. The fuel gauge does not operate.
3. In both cases.

Correct answer: A motor vehicle used for practical driving instruction does not have the required identification sign. ABC · D/T

In tests: ABC 33, D/T 35

22. A motorcycle may not be operated if:

1. The safety bars provided by its design are missing.
2. The minimum remaining tire tread depth is 1.6 mm.
3. In both cases.

Correct answer: The safety bars provided by its design are missing. ABC · D/T

In tests: ABC 14, D/T 25

23. A vehicle may not be operated if:

1. Yellow-light turn signals are installed at the front.
2. Even one wheel-fastening bolt is missing.
3. In both cases.

Correct answer: Even one wheel-fastening bolt is missing. ABC · D/T

In tests: ABC 7, D/T 48

24. A vehicle may not be operated if:

1. Amber-light turn signals are installed at the front.
2. The trailer towing device is defective.
3. In both cases.

Correct answer: The trailer towing device is defective. ABC · D/T

In tests: ABC 23

25. A vehicle may not be operated if:

1. White reflectors are installed at the front.
2. The trailer towing device is defective.
3. In both cases.

Correct answer: The trailer towing device is defective. ABC · D/T

In tests: ABC 5, D/T 24

26. A vehicle may not be operated if:

1. The seat belts provided by the vehicle’s design are missing.
2. White-light backup lamps are installed at the rear.
3. In both cases.

Correct answer: The seat belts provided by the vehicle’s design are missing. ABC · D/T

In tests: ABC 40, D/T 28

27. A motorcycle with a sidecar may not be operated if:

1. The transverse passenger handhold on the seat, as provided by the design, is missing.
2. The remaining tire tread depth is 0.6 mm.
3. A first-aid kit is missing.
4. In all of the listed cases.

Correct answer: In all of the listed cases. ABC

In tests: ABC 53

28. A vehicle may not be operated if:

1. The interior lighting devices of a passenger car do not operate.
2. The head restraints provided by the vehicle’s design are missing.
3. In both cases.

Correct answer: The head restraints provided by the vehicle’s design are missing. ABC

29. A vehicle may not be operated if:

1. Red reflectors are installed at the rear.
2. The speedometer provided by the vehicle’s design does not operate.
3. In both cases.

Correct answer: The speedometer provided by the vehicle’s design does not operate. ABC · D/T

In tests: D/T 26

30. A vehicle may not be operated if:

1. The total play in the steering system of a passenger car exceeds 10 degrees.
2. The mud flaps and splash guards provided by the vehicle design are missing.
3. In both cases.

Correct answer: In both cases. ABC

In tests: ABC 38

31. A vehicle may not be operated if:

1. A first-aid kit is missing from a passenger car.
2. Red-light backup lamps are installed at the rear.
3. In both cases.

Correct answer: In both cases. ABC

In tests: ABC 43

32. A vehicle may not be operated if:

1. The remaining tread depth of the tires on a passenger-car trailer is less than 1.6 mm.
2. Amber-light turn signals are installed at the rear.
3. In both cases.

Correct answer: The remaining tread depth of the tires on a passenger-car trailer is less than 1.6 mm. ABC

In tests: ABC 31

33. A vehicle may not be operated if:

1. The hydraulic brake system is not leak-tight.
2. White-light turn signals are installed at the rear.
3. In both cases.

Correct answer: In both cases. ABC · D/T

In tests: ABC 11

34. A vehicle may not be operated if:

1. Tires of different constructions are installed on the same axle.
2. The engine fuel system is not leak-tight.
3. In both cases.

Correct answer: In both cases. ABC · D/T

In tests: ABC 25

35. A vehicle may not be operated if:

1. The horn does not operate.
2. The cooling system does not maintain a stable operating temperature for the engine.
3. In both cases.

Correct answer: The horn does not operate. ABC · D/T

In tests: ABC 12, D/T 23

36. A vehicle may not be operated if:

1. There is movement in steering parts or assemblies that is not provided for by the design.
2. White-light turn signals are installed at the front.
3. In both cases.

Correct answer: There is movement in steering parts or assemblies that is not provided for by the design. ABC · D/T

In tests: ABC 26

37. A vehicle may not be operated if:

1. The engine operates intermittently.
2. The tires have localized damage exposing the tire cord.
3. In both cases.

Correct answer: The tires have localized damage exposing the tire cord. ABC

In tests: ABC 36

38. A passenger-car may not be operated if:

1. A first-aid kit is missing.
2. The remaining tire tread depth is 2.2 mm.
3. In both cases.

Correct answer: A first-aid kit is missing. ABC

In tests: ABC 34

39. A vehicle may not be operated if:

1. For a bus built on a passenger-car chassis, the total play in the steering system exceeds 10 degrees.
2. The mudguards and splash guards provided by the vehicle’s design are missing.
3. In both cases.

Correct answer: In both cases. ABC

In tests: ABC 4

40. A vehicle may not be operated if:

1. The cargo-bed door latch provided by the vehicle’s design does not operate.
2. The cab door latch provided by the vehicle’s design does not operate.
3. In both cases.

Correct answer: In both cases. ABC · D/T

In tests: ABC 22

41. A vehicle may not be operated if:

1. Red-light turn signals are installed at the rear.
2. The rear protective device provided by the vehicle’s design is missing.
3. In both cases.

Correct answer: The rear protective device provided by the vehicle’s design is missing. ABC · D/T

In tests: ABC 42

42. A vehicle may not be operated if:

1. The power steering system provided by the vehicle’s design is defective or missing.
2. The horn does not operate.
3. In both cases.

Correct answer: The power steering system provided by the vehicle’s design is defective or missing. ABC · D/T

In tests: ABC 21, D/T 8

43. A vehicle may not be operated if:

1. The parking brake system does not hold the vehicle stationary on the gradient specified by the standard.
2. The leak-tightness of the transmission seals is compromised.
3. In both cases.

Correct answer: In both cases. ABC · D/T

In tests: ABC 1

44. A vehicle may not be operated if:

1. The spare-wheel holder does not operate.
2. The leak-tightness of the rear-axle seals is compromised.
3. In both cases.

Correct answer: In both cases. ABC · D/T

In tests: ABC 13

45. A vehicle may not be operated if:

1. There are visible tears in the webbing of the seat belts provided by the vehicle’s design.
2. The vehicle is not equipped with fog lamps.
3. In both cases.

Correct answer: There are visible tears in the webbing of the seat belts provided by the vehicle’s design. ABC · D/T

In tests: ABC 28

46. A vehicle may not be operated if:

1. The engine-hood latch provided by the vehicle’s design does not operate.
2. The rear side windows are curtained and two side rear-view mirrors are installed.
3. In both cases.

Correct answer: The engine-hood latch provided by the vehicle’s design does not operate. ABC · D/T

In tests: ABC 37

47. A vehicle may not be operated if:

1. The rear side windows are curtained and two side rear-view mirrors are missing.
2. The window heating and defogging devices provided by the vehicle’s design do not operate.
3. In both cases.

Correct answer: In both cases. ABC · D/T

In tests: ABC 46, D/T 5

48. A vehicle may not be operated if:

1. The fuel-tank cap provided by the vehicle’s design does not operate.
2. The front side windows are curtained.
3. In both cases.

Correct answer: In both cases. ABC · D/T

In tests: ABC 44

49. A vehicle may not be operated if:

1. The horn does not operate.
2. The windows provided by the vehicle’s design are missing.
3. In both cases.

Correct answer: In both cases. ABC · D/T

In tests: ABC 16, D/T 45

50. A vehicle may not be operated if:

1. There are cracks in a wheel rim or wheel disc.
2. There are visible distortions in the shape or dimensions of the wheel-rim mounting holes.
3. In both cases.

Correct answer: In both cases. ABC · D/T

In tests: ABC 30, D/T 21

51. A vehicle may not be operated if:

1. The exterior lighting devices and reflectors are dirty.
2. The front and rear protective devices are dirty.
3. In both cases.

Correct answer: The exterior lighting devices and reflectors are dirty. ABC · D/T

In tests: D/T 2

52. A vehicle may not be operated if:

1. Lamps or lenses are missing from the lighting devices.
2. Lenses or lamps that do not correspond to the type of the lighting device are used.
3. In both cases.

Correct answer: In both cases. ABC · D/T

In tests: ABC 35

53. A vehicle may not be operated if:

1. The exterior lighting devices and reflectors are dirty.
2. Exterior lighting devices from a different make of vehicle are installed on a discontinued vehicle.
3. In both cases.

Correct answer: The exterior lighting devices and reflectors are dirty. ABC · D/T

In tests: ABC 18, D/T 30

54. A vehicle may not be operated if:

1. Tires with different tread patterns are installed on the same axle.
2. The remaining tire tread depth of a passenger car is 1.6 mm.
3. In both cases.

Correct answer: Tires with different tread patterns are installed on the same axle. ABC

In tests: ABC 6

55. A vehicle may not be operated if:

1. The remaining tire tread depth of a truck is 1.4 mm.
2. Yellow reflectors are installed at the front.
3. In both cases.

Correct answer: Yellow reflectors are installed at the front. ABC

In tests: ABC 39

56. A vehicle may not be operated if:

1. Yellow reflectors are installed at the rear.
2. Yellow reflectors are installed at the front.
3. In both cases.

Correct answer: In both cases. ABC · D/T

In tests: ABC 9, D/T 50

57. A vehicle may not be operated if:

1. An “Oversized Cargo” identification sign with white and red reflective stripes is installed at the rear.
2. The remaining tire tread depth of a moped is 0.7 mm.
3. In both cases.

Correct answer: The remaining tire tread depth of a moped is 0.7 mm. ABC

In tests: ABC 10

58. A vehicle may not be operated if:

1. The “Doctor” identification sign is missing from an automobile driven by a physician-driver.
2. The fuel-tank cap provided by the vehicle’s design does not operate.
3. In both cases.

Correct answer: The fuel-tank cap provided by the vehicle’s design does not operate. ABC · D/T

In tests: ABC 3, D/T 33

59. A vehicle may not be operated if:

1. Tires with different tread patterns are installed on the same axle.
2. A “Transportation of Children” identification sign with a yellow reflective background and red reflective border is installed at the front.
3. In both cases.

Correct answer: Tires with different tread patterns are installed on the same axle. ABC · D/T

In tests: ABC 24, D/T 20

60. A vehicle may not be operated if:

1. The driver’s seat adjustment mechanism provided by the vehicle’s design does not operate.
2. The interior lighting devices of the bus passenger compartment do not operate.
3. In both cases.

Correct answer: In both cases. D/T

In tests: D/T 15

61. A vehicle may not be operated if:

1. The engine is difficult to start.
2. A first-aid kit is missing from the bus.
3. In both cases.

Correct answer: A first-aid kit is missing from the bus. D/T

In tests: D/T 43

62. A vehicle may not be operated if:

1. An emergency warning triangle is missing from the bus.
2. White-light license plate lamps are installed at the rear.
3. In both cases.

Correct answer: An emergency warning triangle is missing from the bus. D/T

In tests: D/T 10

63. A vehicle may not be operated if:

1. The threaded connections of the steering system are not tightened or secured in the prescribed manner.
2. Fire extinguishers are missing from the bus.
3. In both cases.

Correct answer: In both cases. D/T

In tests: D/T 42

64. A vehicle may not be operated if:

1. The remaining tread depth of the bus tires is 1.8 mm.
2. The hydraulic brake system is not leak-tight.
3. In both cases.

Correct answer: In both cases. D/T

In tests: D/T 40

65. A vehicle may not be operated if:

1. The pressure gauge of the pneumatic brake system does not operate.
2. The remaining tread depth of the bus tires is 1.6 mm.
3. In both cases.

Correct answer: In both cases. D/T

66. A vehicle may not be operated if:

1. The exterior lighting devices do not operate in the prescribed mode.
2. The remaining tread depth of the bus tires is 0.8 mm.
3. In both cases.

Correct answer: In both cases. D/T

67. A bus may not be operated if:

1. The engine operates intermittently.
2. The tires have localized damage exposing the tire cord.
3. In both cases.

Correct answer: The tires have localized damage exposing the tire cord. D/T

In tests: D/T 6

68. A bus may not be operated if:

1. A first-aid kit is missing.
2. The remaining tire tread depth is 2.2 mm.
3. In both cases.

Correct answer: A first-aid kit is missing. D/T

In tests: D/T 11

69. A vehicle may not be operated if:

1. The interior lighting devices of a passenger car do not operate.
2. The interior lighting devices of the bus passenger compartment do not operate.
3. In both cases.

Correct answer: The interior lighting devices of the bus passenger compartment do not operate. D/T

In tests: D/T 7

70. A vehicle may not be operated if:

1. For a bus built on a passenger-car chassis, the total play in the steering system exceeds 10 degrees.
2. The mudguards and splash guards provided by the vehicle’s design are missing.
3. In both cases.

Correct answer: In both cases. D/T

In tests: D/T 1

71. A vehicle may not be operated if:

1. For a bus built on a passenger-car chassis, the total play in the steering system is 15 degrees.
2. The total play in the steering system of a bus is 15 degrees.
3. In both cases.

Correct answer: For a bus built on a passenger-car chassis, the total play in the steering system is 15 degrees. D/T

72. A bus may not be operated if:

1. White reflectors are installed at the rear.
2. Red reflectors are installed at the rear.
3. In both cases.

Correct answer: White reflectors are installed at the rear. D/T

In tests: D/T 37

73. A bus may not be operated if:

1. At least two wheel chocks are available.
2. White reflectors are installed at the rear.
3. In both cases.

Correct answer: White reflectors are installed at the rear. D/T

74. A bus may not be operated if:

1. The emergency door-opening devices do not operate.
2. Red-light turn signals are installed at the front.
3. In both cases.

Correct answer: In both cases. D/T

75. A bus may not be operated if:

1. The stop-request signal does not operate.
2. Red-light turn signals are installed at the rear.
3. In both cases.

Correct answer: The stop-request signal does not operate. D/T

In tests: D/T 13

76. A bus may not be operated if:

1. The remaining tire tread depth is 1.6 mm.
2. The engine coolant temperature gauge does not operate.
3. In both cases.

Correct answer: The remaining tire tread depth is 1.6 mm. D/T

In tests: D/T 36

77. A bus may not be operated if:

1. The remaining tire tread depth is 2.5 mm.
2. The interior lighting devices of the passenger compartment do not operate.
3. In both cases.

Correct answer: The interior lighting devices of the passenger compartment do not operate. D/T

In tests: D/T 51

78. A bus may not be operated if:

1. The emergency exits and the devices for operating them do not function.
2. The stop-request signal does not operate.
3. In both cases.

Correct answer: In both cases. D/T

79. A bus may not be operated if:

1. The door-control mechanism does not operate.
2. A first-aid kit is missing.
3. In both cases.

Correct answer: In both cases. D/T

80. A bus with a maximum authorized mass exceeding 5 metric tons may not be operated if:

1. The wheel chocks are missing.
2. Red-light backup lamps are installed at the rear.
3. In both cases.

Correct answer: In both cases. D/T

81. A bus may not be operated if:

1. Only one fire extinguisher is available.
2. The emergency warning triangle is missing.
3. In both cases.

Correct answer: In both cases. D/T

82. A bus may not be operated if:

1. Only one wheel chock is available.
2. Only one fire extinguisher is available.
3. In both cases.

Correct answer: In both cases. D/T

In tests: D/T 27

83. A bus traveling on a motorway develops a technical malfunction that prevents it from exceeding 40 km/h. Is the bus permitted to continue at that speed until reaching the nearest parking area or repair facility?

1. Not permitted.
2. Permitted if the bus is traveling in the rightmost lane and the hazard warning lights are activated.

Correct answer: Not permitted. D/T

84. What must the driver of a bus traveling on a motorway do in the event of a forced stop on the roadway?

1. Leave the vehicle in place, activate the left turn signal, and wait for a towing vehicle to arrive.
2. Activate the hazard warning lights, place an emergency stop sign, and take measures to remove the bus from the roadway.

Correct answer: Activate the hazard warning lights, place an emergency stop sign, and take measures to remove the bus from the roadway. D/T

In tests: D/T 38

85. A bus may not be operated if:

1. Bulbs or lenses are missing from exterior lighting devices.
2. The engine coolant temperature indicator does not operate.
3. In both cases.

Correct answer: Bulbs or lenses are missing from exterior lighting devices. D/T

In tests: D/T 46

86. A bus may not be operated if:

1. The remaining tread depth of the tires is 2.5 mm.
2. Lenses or bulbs that do not correspond to the given lighting device are used in exterior lighting devices.
3. In both cases.

Correct answer: Lenses or bulbs that do not correspond to the given lighting device are used in exterior lighting devices. D/T

In tests: D/T 16

87. A bus may not be operated if:

1. White turn-signal lights are installed at the rear.
2. Red turn-signal lights are installed at the rear.
3. In both cases.

Correct answer: White turn-signal lights are installed at the rear. D/T

In tests: D/T 55

88. A bus may not be operated if:

1. The tires do not correspond to the given vehicle model in size or permissible load.
2. Red turn-signal lights are installed at the front.
3. In both cases.

Correct answer: In both cases. D/T

In tests: D/T 18

89. A bus may not be operated if:

1. At least two wheel chocks are available.
2. The exhaust-gas discharge system is defective.
3. In both cases.

Correct answer: The exhaust-gas discharge system is defective. D/T

90. A bus may not be operated if:

1. The crankcase ventilation system is not airtight.
2. Red reflectors are installed at the rear.
3. In both cases.

Correct answer: The crankcase ventilation system is not airtight. D/T

In tests: D/T 54

91. A bus may not be operated if:

1. The emergency exits and the devices used to operate them are not functioning.
2. The remaining tread depth of the tires is 2.2 mm.
3. In both cases.

Correct answer: The emergency exits and the devices used to operate them are not functioning. D/T

92. A bus may not be operated if:

1. The door-control mechanism does not operate.
2. One fire extinguisher is available.
3. In both cases.

Correct answer: In both cases. D/T

93. A bus may not be operated if:

1. One fire extinguisher is available.
2. Two fire extinguishers are available.
3. In both cases.

Correct answer: One fire extinguisher is available. D/T

In tests: D/T 17

94. A bus with a maximum authorized mass exceeding 5 metric tons may not be operated if:

1. One wheel chock is available.
2. One fire extinguisher is available.
3. In both cases.

Correct answer: In both cases. D/T

In tests: D/T 31

95. A bus with a maximum authorized mass exceeding 5 metric tons may not be operated if:

1. Wheel chocks are absent.
2. Red reversing lights are installed at the rear.
3. In both cases.

Correct answer: In both cases. D/T

In tests: D/T 12

96. A bus may not be operated if:

1. The total steering-system play of a bus with a maximum authorized mass exceeding 5 metric tons is 15 degrees.
2. The total steering-system play of a bus built on the chassis of a passenger car is 15 degrees.
3. In both cases.

Correct answer: The total steering-system play of a bus built on the chassis of a passenger car is 15 degrees. D/T

In tests: D/T 32

97. A bus may not be operated if:

1. Two wheel chocks are available.
2. The interior lighting devices of the bus passenger compartment do not operate.
3. In both cases.

Correct answer: The interior lighting devices of the bus passenger compartment do not operate. D/T

In tests: D/T 14

98. A bus may not be operated if:

1. The “Emergency Stop” sign is absent from the bus.
2. The rear-wheel fastening bolts are securely tightened.
3. In both cases.

Correct answer: The “Emergency Stop” sign is absent from the bus. D/T

99. A bus may not be operated if:

1. The remaining tread depth of the bus tires is 2.2 mm.
2. The hydraulic brake drive is not airtight.
3. In both cases.

Correct answer: The hydraulic brake drive is not airtight. D/T

100. A bus may not be operated if:

1. Changes have been made to the bus design without permission from the vehicle registration authority.
2. The remaining tread depth of the bus tires is 1.6 mm.
3. In both cases.

Correct answer: In both cases. D/T

In tests: D/T 19

101. A bus may not be operated if:

1. The engine operates intermittently.
2. On buses equipped with a gas-cylinder fuel system, the dates of the most recent and scheduled inspections are not indicated on the outer surface of the gas cylinders.
3. In both cases.

Correct answer: On buses equipped with a gas-cylinder fuel system, the dates of the most recent and scheduled inspections are not indicated on the outer surface of the gas cylinders. D/T

In tests: D/T 47

102. A bus may not be operated if:

1. The tires have carcass separation.
2. The remaining tread depth of the tires is 2.2 mm.
3. In both cases.

Correct answer: The tires have carcass separation. D/T

103. A vehicle may not be operated if:

1. The threaded connections of the steering system are not tightened or secured in the prescribed manner.
2. The threaded connections of the steering system are secured in the prescribed manner.
3. In both cases.

Correct answer: The threaded connections of the steering system are not tightened or secured in the prescribed manner. D/T

In tests: D/T 34

104. According to the traffic rules, a bus steering system is considered inoperative if:

1. The steering wheel is difficult to turn.
2. The driver is unable to change the direction of travel even when proceeding at minimum speed.
3. The total steering-system play is 25 degrees.

Correct answer: The driver is unable to change the direction of travel even when proceeding at minimum speed. D/T

In tests: D/T 53

105. According to the traffic rules, a bus braking system is considered inoperative if:

1. The brake pedal is difficult to depress.
2. The bus deviates even minimally to the side during braking.
3. The driver is unable to stop the vehicle even when proceeding at minimum speed.

Correct answer: The driver is unable to stop the vehicle even when proceeding at minimum speed. D/T

In tests: D/T 41

106. A bus may not be operated if:

1. The remaining tread depth of the tires is 2.2 mm.
2. The tires have tread or sidewall separation.
3. In both cases.

Correct answer: The tires have tread or sidewall separation. D/T

In tests: D/T 3

107. This sign applies:

1. From November 15 of the current year through March 31 of the following year.
2. Throughout the year.
3. When snow or ice is present.

Correct answer: When snow or ice is present. D/T

In tests: D/T 4

108. This image applies to:

1. All types of vehicles.
2. Only trucks and buses with a maximum authorized mass exceeding 3.5 metric tons.

Correct answer: Only trucks and buses with a maximum authorized mass exceeding 3.5 metric tons. D/T

In tests: D/T 29

109. This road sign indicates:

1. “Driving with Winter Tires.”
2. “Driving with Anti-Skid Chains.”
3. “Driving with Studded Tires.”

Correct answer: “Driving with Anti-Skid Chains.” D/T

In tests: D/T 52

110. The area of effect of this sign extends:

1. To the end of the populated area.
2. To the end of the snow- or ice-covered section.
3. To the “End of Driving with Anti-Skid Chains” sign.

Correct answer: To the “End of Driving with Anti-Skid Chains” sign. D/T