NM CDL AIR BRAKES PRACTICE TEST
21.
On any upgrade, gravity:
|
speed you up.
|
|
|
doubles your speed.
|
|
|
slows you down.
|
22.
To test the air leakage rate, with a fully-charged air system you should ____________ and time the air pressure drop.
|
release the parking brake, leave the engine running
|
|
|
put alcohol into the air system, run the engine at a fast idle
|
|
|
turn off the engine, release the parking brake
|
23.
Most heavy-duty vehicles use:
|
hydraulic brakes.
|
|
|
air brakes.
|
|
|
solid brakes.
|
24.
Brake lag is:
|
the time required for the air brakes to work after the brake pedal is pushed.
|
|
|
the distance your vehicle will travel, in ideal conditions, while you are braking.
|
|
|
the amount of air pressure required to stop the vehicle.
|
25.
ABS brakes help you:
|
downshift before starting down a hill.
|
|
|
lock up the wheels in an emergency stop.
|
|
|
avoid wheel lock up.
|
GRADE ME
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More