CA CDL COMBINATION
VEHICLES TEST
A driver crosses the air lines when hooking up to an old trailer with
no spring brakes. What will happen? - ANSWERS-The driver could
drive away with no trailer brakes
For a coupling to complete, the safety catch for the fifth wheel
locking level must be: - ANSWERS-Over the locking lever
A trailer is most likely to jackknife when it is: - ANSWERS-Empty
The trailer air supply control (or tractor protection valve control)
should automatically close when the air pressure fails to between
______ psi. - ANSWERS-20 and 45
After you connect the air lines, but before you back under the trailer,
you should: - ANSWERS-Supply air to the trailer system, then pull
out the air supply knob
To unlock the fifth wheel, pull the release handle to the _______
position. - ANSWERS-Open
Which part of the kingpin should the locking jaws close around? -
ANSWERS-The shank
VEHICLES TEST
A driver crosses the air lines when hooking up to an old trailer with
no spring brakes. What will happen? - ANSWERS-The driver could
drive away with no trailer brakes
For a coupling to complete, the safety catch for the fifth wheel
locking level must be: - ANSWERS-Over the locking lever
A trailer is most likely to jackknife when it is: - ANSWERS-Empty
The trailer air supply control (or tractor protection valve control)
should automatically close when the air pressure fails to between
______ psi. - ANSWERS-20 and 45
After you connect the air lines, but before you back under the trailer,
you should: - ANSWERS-Supply air to the trailer system, then pull
out the air supply knob
To unlock the fifth wheel, pull the release handle to the _______
position. - ANSWERS-Open
Which part of the kingpin should the locking jaws close around? -
ANSWERS-The shank