🛞Alabama Air Brakes — Question 6 of 10
Parking or emergency brakes of trucks and buses can be legally held on by ____ pressure.
Answer: C
Spring
Since air pressure will eventually leak away with time, emergency brakes must be activated and held by mechanical force. All commercial trucks require emergency brakes. Currently, those are spring-loaded mechanical brakes.
Source: Alabama CDL Manual
All choices
- AAir
- BFluid
- CSpring
Alabama CDL Air Brakes Test Info
Questions on Exam
25
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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More CDL Air Brakes Practice Questions
- To check the free play of manual slack adjusters of S-cam brakes, you should park on:
- A slack adjuster free play needs to be adjusted if it is more than about ____ when you pull hard on it.
- Stab braking:
- Which procedure is used in controlled braking?
- Which braking technique may be used to stop quickly when you do not have ABS?