CDL AIR BRAKES PRACTICE TEST - MINNESOTA
21.
The safety valve installed in the first tank the air compressor pumps air is set to open:
|
if there is too little pressure.
|
|
|
at 30 psi.
|
|
|
if there is too much pressure.
|
|
|
every 15 minutes.
|
22.
When you release the brake pedal, the _____ rotates back and a spring pulls the brake shoes away from the drum.
|
hydraulic brake system
|
|
|
air compressor belt
|
|
|
S-cam
|
|
|
pressure gauge
|
23.
When you pull hard on a slack adjuster and it moves more than about _____ where the push rod attaches to it, the slack adjuster probably needs adjustment.
|
2 inches
|
|
|
1/4 inch
|
|
|
1/2 inch
|
|
|
1 inch
|
24.
The parking brake:
|
should be used when driving in bad weather.
|
|
|
should be used whenever you park.
|
|
|
should be used when you need to apply the brakes firmly.
|
|
|
All of the above.
|
25.
Your vehicle has a dual air brake system. If one air system is very low on pressure, you should:
|
call your dispatcher or supervisor for instructions.
|
|
|
reduce your speed and check the low air pressure warning signal for the other system regularly.
|
|
|
bring the vehicle to a safe stop, and have the air brakes system fixed.
|
|
|
reduce your speed and drive to the nearest garage for repairs.
|
GRADE ME
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More