🛞California Air Brakes — Question 4 of 10
What is the purpose of the modulating control valve (when equipped)?
California 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+
California DMV
Official CDL PortalReady to pass your California CDL Air Brakes exam?
Get full practice exams, study mode, and simulated tests with detailed explanations.
Risk-free — cancel anytime, no charge until trial ends.
Study this on the go
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?