NEW JERSEY CDL AIR BRAKES PRACTICE TEST
21.
When backing a trailer, you should:
|
turn the steering wheel in the direction you want to go.
|
|
|
try to position your vehicle so you can back in a straight line.
|
|
|
avoid correcting the drift.
|
|
|
never make pull-ups to reposition your vehicle.
|
22.
How should you apply the brakes when going down a steep downgrade?
|
You should not brake, and only use engine braking to prevent brake failure.
|
|
|
Apply the brakes as hard as you can without locking the wheels.
|
|
|
Apply the brakes whenever you reach your safe speed, until your speed has been reduced to 5 mph below your safe speed.
|
|
|
Apply the brakes when you reach the bottom of the downgrade.
|
23.
The air brake lag distance at 55 mph on dry pavement adds about:
|
75 feet.
|
|
|
16 feet.
|
|
|
32 feet.
|
|
|
60 feet.
|
24.
To perform an applied leakage test, the vehicle’s air pressure should be built up to maximum pressure. Check the air gauge to see that the air pressure should drop no more than:
|
1 psi for single vehicles and 3 psi for a combination of 2 vehicles.
|
|
|
2 psi for single vehicles and 5 psi for a combination of 2 vehicles.
|
|
|
5 psi for single vehicles and 6 psi for a combination of 2 vehicles.
|
|
|
3 psi for single vehicles and 4 psi for a combination of 2 vehicles.
|
25.
Before leaving your vehicle unattended, you should:
|
Chock the wheels.
|
|
|
Remove the keys.
|
|
|
Apply the parking brake.
|
|
|
All of the above.
|
GRADE ME
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More