1.
When the spring brakes are on, you should:
press the accelerator.
|
|
pump the brakes.
|
|
exceed the posted speed limit.
|
|
not push the brake pedal down.
|
2.
With brake drums, if brakes become too hot:
the air compressor will kick on to cool the brakes.
|
|
the brakes will supply too much power to the drive wheels.
|
|
your ABS will malfunction.
|
|
the brakes may stop working.
|
3.
Passive railroad crossings:
should never be crossed using a CMV.
|
|
usually have a person directing traffic.
|
|
do not have traffic control devices.
|
|
have at least one traffic control device.
|
4.
To check the slack adjusters:
check the air hoses connected to the brake chambers to make sure they aren't cut or worn.
|
|
Park on level ground and chock the wheels, release the parking brakes and pull hard on each slack adjuster. The slack adjuster shouldn't move more than one inch.
|
|
park downhill and see if the vehicle rolls.
|
|
None of the above.
|
5.
Most heavy duty vehicles use ___ air brake systems for safety.
single
|
|
dual
|
|
reduced
|
|
triple
|
6.
Pressing and releasing the brake pedal unnecessarily can:
let air out faster than the compressor can replace it.
|
|
causes all the air to be lost.
|
|
causes friction, which slows the vehicle.
|
|
apply more air pressure.
|
7.
The air compressor stops pumping air into the air storage tanks when air tank pressure rises to around:
125 psi.
|
|
250 psi.
|
|
100 psi.
|
|
450 psi.
|
8.
Why should you check your mirrors regularly to know where other vehicles are around you?
To know whether you can make a quick lane change in an emergency.
|
|
To flash the brake lights if you are being tailgated.
|
|
To move out of their way if they want to get past.
|
|
To better assess your own speed.
|
9.
The one-way check valve:
keeps your wheels from locking up when you brake hard.
|
|
supplies air to the trailer air tanks.
|
|
keeps the axles in place.
|
|
keeps air from going out if the air compressor develops a leak.
|
10.
You can be sure that your vehicle is equipped with ABS:
if the vehicle was manufactured after 2010.
|
|
if the vehicle was manufactured after 2000.
|
|
if your company requires the use of antilock brakes in its policies.
|
|
if the vehicle was manufactured after 1998.
|
Next page
NOT SURE YOU WILL PASS? GET CDL PREMIUM NOW! - Learn More
Rate This Free Test