Combination TEXAS CDL EXAM |\ |\ |\ |\
QUESTIONS WITH ANSWERS |\ |\
You are coupling a semi-trailer to your tractor but have
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
not yet backed under, the trailer is at the rigt height
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
when: |\
A- It will be raised slightly when the tractor is backed
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
under it |\ |\
B- The kingpin is about 1-1/4 inches above the fifth wheel
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
C- The end of the kingpin is even with the top of the fifth
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
wheel - CORRECT ANSWERS ✔✔A
|\ |\ |\ |\
You should not back a tractor under a trailer until the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
whole air system is: |\ |\ |\
A- Between 60 and 80 PSI
|\ |\ |\ |\ |\
B- At normal pressure
|\ |\ |\
C- Empty - CORRECT ANSWERS ✔✔B
|\ |\ |\ |\ |\
When you get ready to back under the semi-trailer you
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
should line up: |\ |\
,A- About 12 degrees off the line of the trailer
|\ |\ |\ |\ |\ |\ |\ |\ |\
B- The kingpin to engage the drivers side locking jaw first
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
C- Directly in front of the trailer - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔C
When you get ready to back under the semi trailer you
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
should line up: |\ |\
A- About 12 degrees off the line of the trailer
|\ |\ |\ |\ |\ |\ |\ |\ |\
B- The kingpin to engage the drivers side locking jaw first
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
C- Directly in front of the trailer - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔C
How should you test the tractor semi-trailer connection
|\ |\ |\ |\ |\ |\ |\ |\
for security?
|\
A- Pull gently forward in low gear against the locked
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
trailer brakes, then look at it carefully
|\ |\ |\ |\ |\ |\
B- Put the tractor in gear and pull ahead with a sharp jerk
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
C- Rock the trailer back and forth with the trailer brakes
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
locked - CORRECT ANSWERS ✔✔A
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When should you use the hand valve to park a
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
combination vehicle? |\
, A- To park at loading docks
|\ |\ |\ |\ |\
B- Never
|\
C- To park on a grade - CORRECT ANSWERS ✔✔B
|\ |\ |\ |\ |\ |\ |\ |\ |\
You supply air to the trailer tanks by
|\ |\ |\ |\ |\ |\ |\
a) Pulling out the trailer air supply valve
|\ |\ |\ |\ |\ |\ |\
b) Pushing in the trailer air supply valve
|\ |\ |\ |\ |\ |\ |\
c) Connecting the service line glad hand - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔A |\
Why should you be sure that the fifth wheen plate is
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
greased as required? |\ |\
A- To reduce heat and noise
|\ |\ |\ |\ |\
B- To prevent steering problems
|\ |\ |\ |\
C- To ensure good electrical connections - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔B |\
After you supply air to the trailer, make sure the air lines
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
are not crossed and the trailer brakes are working. This is
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
done by: |\
QUESTIONS WITH ANSWERS |\ |\
You are coupling a semi-trailer to your tractor but have
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
not yet backed under, the trailer is at the rigt height
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
when: |\
A- It will be raised slightly when the tractor is backed
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
under it |\ |\
B- The kingpin is about 1-1/4 inches above the fifth wheel
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
C- The end of the kingpin is even with the top of the fifth
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
wheel - CORRECT ANSWERS ✔✔A
|\ |\ |\ |\
You should not back a tractor under a trailer until the
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
whole air system is: |\ |\ |\
A- Between 60 and 80 PSI
|\ |\ |\ |\ |\
B- At normal pressure
|\ |\ |\
C- Empty - CORRECT ANSWERS ✔✔B
|\ |\ |\ |\ |\
When you get ready to back under the semi-trailer you
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
should line up: |\ |\
,A- About 12 degrees off the line of the trailer
|\ |\ |\ |\ |\ |\ |\ |\ |\
B- The kingpin to engage the drivers side locking jaw first
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
C- Directly in front of the trailer - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔C
When you get ready to back under the semi trailer you
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
should line up: |\ |\
A- About 12 degrees off the line of the trailer
|\ |\ |\ |\ |\ |\ |\ |\ |\
B- The kingpin to engage the drivers side locking jaw first
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
C- Directly in front of the trailer - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
✔✔C
How should you test the tractor semi-trailer connection
|\ |\ |\ |\ |\ |\ |\ |\
for security?
|\
A- Pull gently forward in low gear against the locked
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
trailer brakes, then look at it carefully
|\ |\ |\ |\ |\ |\
B- Put the tractor in gear and pull ahead with a sharp jerk
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
C- Rock the trailer back and forth with the trailer brakes
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
locked - CORRECT ANSWERS ✔✔A
|\ |\ |\ |\
When should you use the hand valve to park a
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
combination vehicle? |\
, A- To park at loading docks
|\ |\ |\ |\ |\
B- Never
|\
C- To park on a grade - CORRECT ANSWERS ✔✔B
|\ |\ |\ |\ |\ |\ |\ |\ |\
You supply air to the trailer tanks by
|\ |\ |\ |\ |\ |\ |\
a) Pulling out the trailer air supply valve
|\ |\ |\ |\ |\ |\ |\
b) Pushing in the trailer air supply valve
|\ |\ |\ |\ |\ |\ |\
c) Connecting the service line glad hand - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔A |\
Why should you be sure that the fifth wheen plate is
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
greased as required? |\ |\
A- To reduce heat and noise
|\ |\ |\ |\ |\
B- To prevent steering problems
|\ |\ |\ |\
C- To ensure good electrical connections - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔B |\
After you supply air to the trailer, make sure the air lines
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
are not crossed and the trailer brakes are working. This is
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
done by: |\
