🚌CDL Passenger — Question 11 of 20

Some city transit buses may have a brake-door interlock system, this system:

Answer: A

Works when the passenger exit doors are open.

The brake and accelerator interlock system holds the throttle in the idle position while applying the brakes whenever the exit door is opened. This safety procedure ensures that the vehicle does not move as passengers enter and exit. This feature should never be used as a parking brake.

All choices

  • AWorks when the passenger exit doors are open.
  • BReleases the brakes.
  • CShould be used in emergencies.

Why the other answers are wrong

B. Releases the brakes.

Choice B is wrong because the system holds the throttle in idle and applies brakes, it does not release the brakes.

C. Should be used in emergencies.

Choice C is wrong because the system is a safety feature used during normal passenger exit, not for emergencies.

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CDL Passenger Test Info

Questions on Exam

20

Passing Score

80%

Time Limit

Typically 30 minutes; varies by testing location

The Passenger test content is federally standardized, so this question applies in every state. Age limits, fees, and testing procedures do vary — check your state's CDL requirements.

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