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Combination Vehicles Practice Test

If the brakes are not released when you pushed the trailer air supply valve you should:
Air brake equipped trailers made before 1975:
Tractor with ______ trailer requires the shortest amount of stopping distance.
There are two things that a driver can do to prevent a rollover. They are: (1) go slow around turns; and (2):
If the service line comes apart while you are driving a combination vehicle but the emergency line stays together, what will happen right away?
Where should the tractor be when you inspect landing gear after uncoupling the trailer?
Why should you be sure that the fifth wheel plate is greased as required?
After connecting the airlines but before backing under the trailer you should:
You have pushed the trailer air supply valve. You should not back a tractor under a trailer until the whole air system is:
The safest way to make a turn without entering another traffic lane is:
Your emergency air line breaks or gets pulled apart while you are driving. The loss of pressure will cause the:
Glad hands are usually connecting which of these?
Your emergency air line breaks or gets pulled apart while you are driving. The loss of pressure will cause the:
There are two things that a driver can do to prevent a rollover. They are: (1) keep the cargo as close to the ground as possible; and (2):
There are two things that a driver can do to prevent a rollover. They are: (1) keep the cargos as close to the ground as possible; and (2):
There are two things that a driver can do to prevent a rollover. They are: (1) go slow around turns; and (2):
The hand valve should be used:
When driving a set of doubles, it is necessary to close which shut-off valve in the last trailer.
You are coupling tractor to a semitrailer. You have connected the airlines. Before backing under the trailer, you should:
If the service line comes apart while you are driving a combination vehicle but the emergency line stays together, what will happen right away?
Which part of the kingpin should the locking jaws close around?
You supply air to the trailer tanks by:
While driving behind other vehicle under good condition you should allow at least one second between your vehicle and the vehicle ahead for each _____ (how many) feet of your vehicle length?
How much space should be allowed between upper and lower fifth wheel after coupling?
A driver crosses the air lines when hooking up to an old trailer. What will happen?
You are coupling a tractor to a semitrailer and have backed up but are not under it. What should you hook up before backing under?
You are about to back your tractor under a semitrailer. The trailer is at the right height when the:
The air brake leakage rate for a combination vehicle (engine off, brakes off) should be less than _____ psi per minute.
The higher the center of gravity of your truck, the:
After you coupled the trailer you should have to raise the landing gear by using: