How should you test the tractor-semitrailer
connection for security ? - ....ANSWER...Pull gently
forward in low gear against the locked trailer
brakes.
You supply air to the trialer tanks by: -
....ANSWER...PUshing in the trailer air supply control
valve
You have a major leak in the service and you put in
the brakes. Service air pressure will escape and
,2|Page
cause the : - ....ANSWER...Service and emergency
airlines from the truck to the trailer
When coupling, the proper position of the fifth wheel
is: - ....ANSWER...Titled down towards the end of the
tractor
After you connect the air lines, but before you back
under the trailer, you should: - ....ANSWER...Supply
air to the trailer system, then pull out the air supply
knob
In general, the higher your turck's "center of gravity"
the : - ....ANSWER...Easier it is to turn over
You should not back a tractor under a trailer until
the whole air system is : - ....ANSWER...At normal
pressure
Compared to a straight truck or bus, there are
___________ things to inspect on a combination
vehicle. - ....ANSWER...More
, 3|Page
Before you back under a truck trailer, make sure the
: - ....ANSWER...Trailer brakes are locked
The air leakage rate for a combination on two
vehicles (engine off, brakes on) should not drop
more than ______ psi per minute. - ....ANSWER...4
When checking that the trailer is securely coupled to
the tractor the landing gear should be: -
....ANSWER...Slightly raised
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) - ....ANSWER...Go
slow around turns
When should you get out of your vehicle when
backing with a trailer? - ....ANSWER...When you are
unsure of your path of tavel
When driving a set of doubles, it is necessary to
close the _________ shut - off valve in the last trailer.
- ....ANSWER...Back
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