THE BEST LOUISIANA CDL Study Guide with All Correct
& 100% Verified Answers |Already Graded A+
Glad hands are used to connect the.... ✔Correct Answer-Service and emergency air lines from the
truck to the trailer.
Why should you be sure the fifth wheel plate is greased as required? ✔Correct Answer-To prevent
steering problems
After connecting the air lines, but before backing under the trailer, you should... ✔Correct Answer-
Supply the 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.... ✔Correct Answer-Triple 28 foot trailers
The trailer air supply control valve should automatically close when the air pressure falls
between____ PSI ✔Correct Answer-20 and 45
When coupling, the proper position of the fifth wheel is..... ✔Correct Answer-Tilted DOWN
towards the end of the tractor
Which part of the king pin should the locking jaws close around? ✔Correct Answer-The shank
When checking that the trailer is securely coupled to the tractor, the landing gear should be...
✔Correct Answer-Slightly raised
A trailer is most likely to jack knife when it is.... ✔Correct Answer-Empty
The spring doesn't release when you push the trailer air supply control valve, you should.....
✔Correct Answer-check the air line connections
Loss of air pressure in the emergency lines causes.... ✔Correct Answer-The trailer emergency
brakes to come on
When you get ready to back under a semi-trailer, you should line up.... ✔Correct Answer-directly in
front of the trailer
The best way to tell if your trailer has started to skid is to..... ✔Correct Answer-see it in your
mirrors.
Why should you lock the tractor glad hands to each other are to the dummy couplers when you or
not towing a trailer? ✔Correct Answer-It will keep dirt and water out of the air lines
To unlock the fifth wheel, pull the release handle to the ________position? ✔Correct Answer-Open
When should you use the hand valve to park a combination vehicle? ✔Correct Answer-Never
A driver crosses the air lines when hooking up to an old trailer, what will happen? ✔Correct
Answer-If the trailer has no spring brakes, you could drive away but you would have no trailer brakes
& 100% Verified Answers |Already Graded A+
Glad hands are used to connect the.... ✔Correct Answer-Service and emergency air lines from the
truck to the trailer.
Why should you be sure the fifth wheel plate is greased as required? ✔Correct Answer-To prevent
steering problems
After connecting the air lines, but before backing under the trailer, you should... ✔Correct Answer-
Supply the 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.... ✔Correct Answer-Triple 28 foot trailers
The trailer air supply control valve should automatically close when the air pressure falls
between____ PSI ✔Correct Answer-20 and 45
When coupling, the proper position of the fifth wheel is..... ✔Correct Answer-Tilted DOWN
towards the end of the tractor
Which part of the king pin should the locking jaws close around? ✔Correct Answer-The shank
When checking that the trailer is securely coupled to the tractor, the landing gear should be...
✔Correct Answer-Slightly raised
A trailer is most likely to jack knife when it is.... ✔Correct Answer-Empty
The spring doesn't release when you push the trailer air supply control valve, you should.....
✔Correct Answer-check the air line connections
Loss of air pressure in the emergency lines causes.... ✔Correct Answer-The trailer emergency
brakes to come on
When you get ready to back under a semi-trailer, you should line up.... ✔Correct Answer-directly in
front of the trailer
The best way to tell if your trailer has started to skid is to..... ✔Correct Answer-see it in your
mirrors.
Why should you lock the tractor glad hands to each other are to the dummy couplers when you or
not towing a trailer? ✔Correct Answer-It will keep dirt and water out of the air lines
To unlock the fifth wheel, pull the release handle to the ________position? ✔Correct Answer-Open
When should you use the hand valve to park a combination vehicle? ✔Correct Answer-Never
A driver crosses the air lines when hooking up to an old trailer, what will happen? ✔Correct
Answer-If the trailer has no spring brakes, you could drive away but you would have no trailer brakes
