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.
Source: Alabama CDL Manual
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.
Alabama CDL Passenger Test Info
Questions on Exam
20
Passing Score
80%
Time Limit
Typically 30 minutes; varies by testing location
Age Requirements
Intrastate: 18+ · Interstate: 21+
Alabama Law Enforcement Agency (ALEA)
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