Texas CDL Section 6: Combination Vehicles.
Exam Questions With Verified Answers.
Glad hands are used to connect the? - answerService and emergency air lines from the tractor
trailer.
Why should you be sure the fifth wheel plate is greased as required? - answerTo prevent
steering problems
Afte...
Glad hands are used to connect the? - answer✔Service and emergency air lines from the tractor
trailer.
Why should you be sure the fifth wheel plate is greased as required? - answer✔To prevent
steering problems
After connecting the air lines, but before backing under the trailer, you should? - answer✔Supply
air to the trailer system, then pull out the supply knob.
A tractor trailer vehicle combination is most likely to roll over in a turn when the configuration
includes? - answer✔Triple 28 foot trailers.
The trailer air supply control valve should automatically close when the air pressure falls
between...psi - answer✔20 and 45
When coupling the proper position of the fifth wheel is? - answer✔Titled downward towards the
end of the tractor.
Which part of the king pin should the locking jaw close around? - answer✔The shank
When checking that the trailer is securely coupled to the tractor the landing gear should be... -
answer✔Slightly raised
A trailer is most likely to jack knife when it is? - answer✔Empty
The spring doesn't release when you push the trailer air supply control valve, you should? -
answer✔Check the air line connections.
Loss of air pressure in the emergency lines causes? - answer✔The trailer emergency brake to
come on.
When you get ready to back under a semi-trailer you should line up? - answer✔Directly in front
of the trailer.
The best way to tell if your trailer has started to skid is to? - answer✔See it in your mirrors
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