Exam (elaborations)
Florida CDL Combination Test with Complete Solutions
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Florida CDL Combination Test with Complete Solutions
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Florida CDL Combination Test withComplete Solutions
A tractor with a(n) _______ trailer requires the shortest amount of stopping distance. -
ANSWER-fully loaded.
A trailer is most likely to jackknife when it is? - ANSWER-empty.
After connecting the air line but before backing under the trailer, you should - ANSWER-
supply air to the trailer system and then pull out the air supply knob.
After the trailer has been coupled to the tractor, the tractor control protection valve
should be placed in what position? - ANSWER-normal
After the trailer has been coupled to the tractor, the tractor protection control valve
should be placed in what position? - ANSWER-normal
After you have coupled the trailer, you should start to raise the landing gear by using -
ANSWER-low gear
After you lock the kingpin into the fifth wheel, you should check the connection by
pulling - ANSWER-the tractor ahead gently with the trailer brakes locked.
Air and electrical lines from the tractor to the trailer should be - ANSWER-secured but
with enough slack for turns
Air line on combination vehicle are often colored to keep them fro getting mixed up. The
emergency line is______, the service line is ______. - ANSWER-red ; blue
At night, when a vehicle is carrying a load that extends for feet or more beyond the rear
of the body, there must be ____________ at the extreme end of the load. - ANSWER-
red lights.
Before you back under a trailer, make sure - ANSWER-the trailer brakes are locked.
Describe what the trailer air supply control does. - ANSWER-it is used to supply the
trailer with air, shut off, and apply the trailer emergency brakes.
For coupling to be completed, the safety catch for the fifth wheel locking lever must
me ? - ANSWER-over the locking lever.
Glad hands are used to connect the - ANSWER-service and emergency air lines from
the truck or tractor to the trailer.
, How much space should there be between the upper and lower fifth wheel after
coupling? - ANSWER-none
How should you test the tractor-semitrailer connection for security? - ANSWER-pull
gently forward in low gear against the locked trailer brakes: then look at it carefully.
If you do not do the final air brake check for air leaks and fix before driving, - ANSWER-
you could lose your brakes while driving.
Semi- trailers made before 1975 that are equipped with air brakes. - ANSWER-often do
not have spring brakes.
The front trailer supports are up, and the trailer is resting on the tractor. Make sure -
ANSWER-there is enough clearance between the tractor frame and the landing gear.
The hand valve should be used - ANSWER-to test the trailer brakes
The iron trailer supports are up, and the trailer resting on the tractor. Make sure that -
ANSWER-there is enough clearance between the tractor frame and the landing gear.
The service line - ANSWER-carries air to relay valve that allows the trailer to be applied
quickly.
The tractor protection valve will close and the trailer ______ brakes will come on when
there is a major leak in the break line. - ANSWER-emergency
To stop a trailer skid, you should - ANSWER-release the brakes.
To unlock the fifth wheel, pull the release handle to the ____ position. - ANSWER-Open
Under good driving conditions, you should leave at least one second of space between
your vehicle and the vehicle ahead for every _______ feet of you vehicle's length. -
ANSWER-10
what are other names for service air line? - ANSWER-control line and signal line
What is a tractor jackknifte? - ANSWER-when you lock up the drive tires on the tractor
and the tractor spins out sideways as the trailer continues to push forward.
What is the emergency air line ? - ANSWER-air lines that control the emergency brakes
on combination vehicles
What is the emergency air line for? - ANSWER-to engage the trailer brakes in case of
air pressure loss
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