MN CDL AIR BRAKES PRACTICE TEST
21.
Slack adjusters:
|
are used to adjust the brakes on an air-brake system.
|
|
|
are the linkage between the operating rod in the brake chamber and drum brakes or disk brakes in an air brake system.
|
|
|
regulate the distance that the air brake has to travel to apply friction to the wheel.
|
|
|
All of the above.
|
22.
How do you test hydraulic brakes for leaks?
|
Pump the brake pedal three times, then apply firm pressure to the pedal and hold for five seconds. The pedal should not move.
|
|
|
Pump the brake pedal ten times and see if it holds.
|
|
|
Pull forward against parking brake to make sure the hydraulic brakes holds.
|
|
|
None of the above.
|
23.
The application pressure gauge:
|
protects the tank and the rest of the system from too much pressure.
|
|
|
stops the compressor from pumping air.
|
|
|
tells you how much pressure is in the air tanks.
|
|
|
shows how much air pressure is being applied to the brakes.
|
24.
The parking or emergency brakes of trucks or buses must be held on by:
|
fluid pressure.
|
|
|
hydraulic pressure.
|
|
|
air pressure.
|
|
|
spring pressure.
|
25.
When a tire fails, you must:
|
get out and check all the tires after you have come to a stop.
|
|
|
hold the steering wheel firmly.
|
|
|
stay off the brake.
|
|
|
All of the above.
|
GRADE ME
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More