AIR BRAKES PRACTICE TEST - UTAH
11.
Before driving a vehicle with a dual air brake system, you should allow time for the air compressor to build up a minimum of ____ pressure in both the primary and secondary systems.
|
35 psi
|
|
|
50 psi
|
|
|
100 psi
|
|
|
150 psi
|
12.
To test the low pressure warning signal, you should:
|
pump the brakes while your vehicle is running.
|
|
|
shut the engine off when you have enough air pressure, turn the electrical power on and step on and off the brake pedal until the low air pressure warning signal comes on.
|
|
|
check the air hoses connected to the brake chambers to make sure they aren't cut.
|
|
|
manually let the air out of your brakes and see if the signal comes on.
|
13.
The braking power of the spring brakes:
|
is not affected by the air pressure level.
|
|
|
depends on the brakes being in adjustment.
|
|
|
is not affected by the condition of the service brakes.
|
|
|
All of the above.
|
14.
Axle weight is:
|
the maximum safe weight your tires can carry at a specified pressure.
|
|
|
the weight transmitted to the ground by one axle or one set of axles.
|
|
|
the value specified by the manufacturer as the loaded weight of one axle.
|
|
|
the weight of all the axles added together.
|
15.
The Johnson bar is a valve that:
|
keeps air from going out if the air compressor develops a leak.
|
|
|
works the trailer brakes.
|
|
|
reduces the braking pressure to a safe level.
|
|
|
is installed in the first tank the air compressor pumps air to.
|
Next page
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More