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Illinois CDL Doubles and Triples Practice Questions - Illinois CDL Doubles and Triples Endorsement Test Exam
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Question
1
of 25
QUESTION 1 / 25
What does the Illinois CDL doubles/triples endorsement primarily authorize?
Choose one answer below.
A
Operating CMVs pulling double or triple trailers where legal
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B
Operating passenger buses
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C
Transporting HazMat without screening
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D
Skipping the Class A skills test
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QUESTION 2 / 25
How does Illinois Secretary of State issue the doubles/triples endorsement?
Choose one answer below.
A
By knowledge test only
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B
By a road test in doubles
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C
By a cargo inspection only
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D
By a HazMat background check
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QUESTION 3 / 25
Which CDL endorsement code is used for double/triple trailers?
Choose one answer below.
A
T
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B
H
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C
N
✓
D
P
✓
QUESTION 4 / 25
What does Illinois list for the T Double and Triple Trailers endorsement?
Choose one answer below.
A
It is a CDL Class A only endorsement
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B
It is required for Class B passenger buses
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C
It is legal only for hazardous materials loads
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D
It replaces the General Knowledge test
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QUESTION 5 / 25
What is a converter dolly?
Choose one answer below.
A
A coupling device with one or two axles and a fifth wheel used to form doubles
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B
A fuel-drain tool
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C
A passenger lift
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D
A steering-axle lock
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QUESTION 6 / 25
For safest handling, where should the heavier semitrailer be placed in doubles?
Choose one answer below.
A
First behind the tractor
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B
In the rear position
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C
On the dolly only
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D
Either position with no effect
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QUESTION 7 / 25
When wheeling a converter dolly into place, how should it line up?
Choose one answer below.
A
In line with the rear trailer kingpin
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B
Sideways to the kingpin
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C
Behind the tractor axle
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D
At a right angle to the trailer
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QUESTION 8 / 25
After hooking the dolly to the front trailer, what must be done with the pintle hook?
Choose one answer below.
A
Lock it
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B
Leave it partly open
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C
Remove it
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D
Tie it with the light cord
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QUESTION 9 / 25
After coupling the dolly to the front trailer, what should be done with the converter gear support?
Choose one answer below.
A
Secure it in the raised position
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B
Let it drag
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C
Use it as a wheel chock
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D
Remove it
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QUESTION 10 / 25
Before backing the dolly under the rear trailer, what must be true of the rear trailer?
Choose one answer below.
A
Brakes locked and/or wheels chocked
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B
Brakes fully released
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C
Air lines removed forever
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D
Landing gear raised completely
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QUESTION 11 / 25
How should the coupling to the second semitrailer be tested?
Choose one answer below.
A
Pull against the pin of the second semitrailer
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B
Drive at highway speed
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C
Disconnect the safety chains
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D
Open cargo doors
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QUESTION 12 / 25
After the rear trailer is coupled, which items must be connected?
Choose one answer below.
A
Safety chains, air hoses, and light cords
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B
Only the light cord
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C
Only cargo straps
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D
Only the fifth-wheel slide pins
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QUESTION 13 / 25
Which shut-off valves should be closed at the rear of the last trailer?
Choose one answer below.
A
Service and emergency shut-offs
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B
Only dashboard vents
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C
Only fuel shut-offs
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D
No shut-offs
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QUESTION 14 / 25
What position should the converter dolly air tank drain valve be in before driving?
Choose one answer below.
A
Closed
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B
Open halfway
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C
Removed
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D
Connected to the light cord
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QUESTION 15 / 25
What should be checked about electrical cords?
Choose one answer below.
A
They are firmly plugged in and secured
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B
They are disconnected for daylight
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C
They wrap around landing gear
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D
They replace safety chains
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QUESTION 16 / 25
Why do doubles/triples need special care?
Choose one answer below.
A
They are less stable and have more things that can go wrong
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B
They always have fewer axles
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C
They cannot carry cargo
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D
They do not use air brakes
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QUESTION 17 / 25
What habit helps prevent rollover in doubles/triples?
Choose one answer below.
A
Steer gently and go slowly around ramps and curves
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B
Accelerate into curves
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C
Brake hard after entering ramps
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D
Turn sharply to reduce off-tracking
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QUESTION 18 / 25
Which trailer is most likely to turn over from crack-the-whip effect?
Choose one answer below.
A
The last trailer
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B
The tractor only
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C
The first trailer always
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D
The converter dolly only
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QUESTION 19 / 25
How should a doubles/triples driver scan traffic?
Choose one answer below.
A
Look far ahead so changes can be gradual
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B
Look only at the hood
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C
Ignore mirrors
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D
Watch only rear tires
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QUESTION 20 / 25
Why do doubles/triples need more following distance?
Choose one answer below.
A
They are longer and cannot be turned or stopped suddenly
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B
They stop shorter than cars
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C
They are always lighter
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D
Rear lights are optional
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QUESTION 21 / 25
When parking doubles/triples, what should the driver avoid?
Choose one answer below.
A
Getting into a spot that cannot be pulled straight through
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B
Using pull-through spaces
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C
Planning an escape path
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D
Checking the lot first
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QUESTION 22 / 25
In an emergency with doubles/triples, what is the first priority?
Choose one answer below.
A
Keep control and avoid sudden movements
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B
Protect the schedule
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C
Save fuel
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D
Open cargo doors
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QUESTION 23 / 25
Where should fifth-wheel jaws close on the kingpin?
Choose one answer below.
A
Around the shank, not the head
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B
Around the head only
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C
Around landing gear
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D
Around the electrical cord
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QUESTION 24 / 25
What landing gear condition is required before driving?
Choose one answer below.
A
Fully raised, undamaged, complete, and handle secured
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B
Half lowered
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C
Dragging
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D
Removed
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QUESTION 25 / 25
What should be true of the pintle hook before driving?
Choose one answer below.
A
It is latched
✓
B
It is partly open
✓
C
It is covered by cargo
✓
D
It is replaced by the light cord
✓
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