Q
89. You are on a steep down grade and have reached your safe speed of 40 mph. You would apply the service brakes until your speed drops to - mph.
Air Brakesmedium
A25
B35
C30
Detailed Explanation
The correct answer is "35". This is based on federal CDL regulations and safety standards.
Correct Answer: 35
Ready to practice for real?
Take our free, full-length Air Brakes practice test. Simulates the actual DMV exam with timed questions.
Start Practice TestRelated Questions
104. How should you check that your service brakes are working properly?
air-brakesmedium
38. The proper method of braking when going down a long and/or steep grades after selecting the proper gear, is to brake until your speed is about _ miles per hour below your 'safe' speed, then release your brakes.
air-brakesmedium
14. During normal driving, spring brakes are usually held back by:
air-brakesmedium
3. The air brake system for a straight truck or bus should not leak at a rate of more than______ psi per minute with the engine off and the brakes released.
air-brakesmedium
47. When you apply your brakes, the air brake system works with an electric switch, by air pressure, to turn on the brake lights.
air-brakesmedium