CDL AIR BRAKES PRACTICE TEST - ARIZONA
21.
If are being followed closely, you should:
|
change lanes quickly.
|
|
|
increase your following distance.
|
|
|
decrease your following distance.
|
22.
Your truck has a dual air system. If either system is very low on pressure:
|
either the front or the rear brake will not be fully operational.
|
|
|
the low pressure warning signal will stop working.
|
|
|
the tractor protection valve will not work properly.
|
23.
With the air pressure built up to governor cutoff, the maximum leakage rates per minute are ___ psi for single vehicles and ___ psi for a combination of 2 vehicles.
|
5; 6
|
|
|
3; 2
|
|
|
3; 4
|
24.
Emergency brakes must be held on by:
|
hydraulic pressure.
|
|
|
mechanical force.
|
|
|
air pressure.
|
25.
The safety valve installed in the first tank the air compressor pumps air is set to open:
|
if there is too much pressure.
|
|
|
at 30 psi.
|
|
|
if there is too little pressure.
|
GRADE ME
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More