CDL · Passenger vehicles
A transit bus has a rear-door brake interlock. Do you need the rear door open before you can set the parking brake?
Correct answer: No; the interlock is a safety aid that never replaces the parking brake.
Answer options
- ANo; the interlock is a safety aid that never replaces the parking brake Correct
- BYes, but only on buses that have hydraulic brakes instead of air brakes
- CYes; with the rear door shut, the parking brake cannot be applied at all
Why
On a transit bus, the interlock sets the brakes and keeps the accelerator at idle whenever the rear door is open, then releases once the door shuts. Because it is only a safety aid, you must still set the parking brake and never rely on the interlock to hold the bus.
About this question
Topic: Passenger vehicles License: CDL
Part of these practice sets:
Where it applies: Asked in every state.
Practice the whole set
This question is part of On the Road with Passengers (20 questions). Take the full set and check your score.
Practice On the Road with PassengersMore questions from On the Road with Passengers
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- When the rear door of a city transit bus is open, which brakes does the door interlock apply?
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