AIR BRAKES PRACTICE TEST - NEBRASKA
6.
Most hydraulic brake failures occur for one of two reasons, one of which is:
|
excessive downshifting.
|
|
|
relying too much on the engine braking effect.
|
|
|
driving in cold weather.
|
|
|
loss of hydraulic pressure.
|
7.
The trailer hand valve should:
|
never be used for parking.
|
|
|
be used in driving.
|
|
|
never be used to test the trailer brakes.
|
|
|
All of the above.
|
8.
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
|
9.
You should check air pressure and temperature gauges:
|
at the beginning of each trip.
|
|
|
as often as is practical.
|
|
|
at the end of each trip.
|
|
|
every time you stop.
|
10.
What is an important thing to remember about emergency braking?
|
Your natural response (hitting the brakes) is never the right solution.
|
|
|
You should never use stab braking.
|
|
|
The more heavily loaded semitrailer trailer should be in the rear.
|
|
|
Pushing down on the brake pedal as hard as you can will only keep the wheels locked up and cause a skid.
|
Next page
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More