AIR BRAKES CDL PRACTICE TEST - SOUTH CAROLINA
21.
If are being followed closely, you should:
|
decrease your following distance.
|
|
|
flash your brake lights.
|
|
|
change lanes quickly.
|
|
|
increase your following distance.
|
22.
Stepping on and off the brake pedal several times:
|
reduces the air pressure in the tanks.
|
|
|
may result in dangerously thin linings.
|
|
|
may cause air leaks.
|
|
|
All of the above.
|
23.
The service brake applies and releases:
|
the parking brake when you use the parking brake control.
|
|
|
the brake in an emergency situation.
|
|
|
the brake when you use the brake pedal during normal driving.
|
|
|
None of the above.
|
24.
Which of the following can cause brakes to fade or fail?
|
Brakes out of adjustment
|
|
|
Not relying on the engine braking effect
|
|
|
Excessive use of the service brakes
|
|
|
All of the above.
|
25.
Spring brakes are usually held back by:
|
modulating control valves.
|
|
|
air pressure.
|
|
|
the brake pedal.
|
|
|
the antilock braking system.
|
GRADE ME
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More