Exam Questions
Exam Questions

Mechanical aspects related to road safety

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Question № 1

Id: 2797
points: 1

Will the rail brakes work after the failure of the converter?

    Yes, provided the power supply from the second carriage is working.

Question № 2

Id: 3943
points: 1

If a tram, equipped with a shoe brake rolls on despite the brake being pressed and parking brake lights flashing, it may indicate:

    an excessive number of passengers in the tram.
    too low voltage of battery charging.
    wear of the friction linings.

Question № 3

Id: 4038
points: 1

Which of the following reasons may cause an interruption in the flow of high voltage current directly to the wagon?

    Damage to the battery.
    Damage to the external sound signal.
    The graphite insert of the pantograph is chipped.

Question № 4

Id: 4039
points: 1

What effect can a chipping of the pantograph's graphite inserts induce?

    Increase in current consumption from the overhead line.
    Excessive rocking, or even break of the overhead line.
    Uninterrupted operation of the pantograph.

Question № 5

Id: 4040
points: 1

When do you use the mechanical brake (also called parking brake)?

    In all stages of braking.
    Only in the final stage of braking and during a stop.
    Only during a stop.

Question № 6

Id: 4041
points: 1

Which of the mentioned factors induces the operation of the parking brake?

    The electromagnetic coil.
    Pressure on the springs.
    Lever system.

Question № 7

Id: 4042
points: 1

What determines the electrodynamic braking efficiency?

    Efficiency of the traction motors.
    Efficiency of the tram's battery.
    The electrodynamic brakes are independent of the tram system.

Question № 8

Id: 4043
points: 1

What should you do to release (loosen) the parking brakes for towing a damaged tram?

    Disconnect the wagon, Upon disconnecting the brakes are automatically loosened.
    Mechanically or electrically unfasten the brake release.
    Set the reversing switch to the neutral position.

Question № 9

Id: 4059
points: 1

What kind of brake is the parking brake?

    Active - operates only after switching on the tram and pressing brake pedal.
    Passive - operates even after switching off the tram.
    Passive - operates only after lowering the pantograph on the wagon.

Question № 10

Id: 4063
points: 1

What effect will stopping the wagon at the point of contact between the pantograph and an insulator trigger?

    Loss of wagon start-up and operation of the inverter.
    Activation of the rail brakes.
    Damage to the graphite inserts of the pantograph.

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