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Washington CDL Doubles and Triples Endorsement Test Practice Questions - Washington CDL Doubles and Triples Endorsement Test Exam
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Question
1
of 25
QUESTION 1 / 25
What endorsement code does Washington use for double and triple trailers?
Choose one answer below.
A
T endorsement
✓
B
N endorsement
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C
H endorsement
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D
P endorsement
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QUESTION 2 / 25
How many questions are on Washington's Double/triple CDL knowledge test?
Choose one answer below.
A
10
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B
25
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C
50
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D
20
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QUESTION 3 / 25
How many correct answers does Washington require on the 20-question Double/triple test?
Choose one answer below.
A
12
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B
14
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C
16
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D
20
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QUESTION 4 / 25
Does Washington list a skills test as needed for the Double/triple endorsement test?
Choose one answer below.
A
Yes, always
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B
No
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C
Only for doubles
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D
Only for triples
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QUESTION 5 / 25
Which Washington Commercial Driver Guide section covers Doubles and Triples?
Choose one answer below.
A
Section 7
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B
Section 5
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C
Section 6
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D
Section 8
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QUESTION 6 / 25
Which sections should doubles/triples applicants also study with Section 7?
Choose one answer below.
A
Sections 1, 3, and 4
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B
Only Section 7
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C
Sections 8, 9, and 10
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D
Sections 2, 5, and 6
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QUESTION 7 / 25
What is a converter dolly used for?
Choose one answer below.
A
It loads cargo into a trailer
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B
It replaces the tractor engine
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C
It provides an axle and fifth wheel so a semi-trailer can be pulled behind another trailer
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D
It measures tire tread depth
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QUESTION 8 / 25
What dolly part fits into the pintle hook on the trailer ahead?
Choose one answer below.
A
Kingpin
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B
Pintle eye
✓
C
Landing gear crank
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D
ABS lamp
✓
QUESTION 9 / 25
After coupling the dolly drawbar, what must be true of the pintle hook?
Choose one answer below.
A
It must be latched
✓
B
It must be removed
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C
It must be left open
✓
D
It must be tied with the light cord
✓
QUESTION 10 / 25
What should be done with converter dolly support legs before travel?
Choose one answer below.
A
Leave them down
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B
Remove them
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C
Drag them lightly
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D
Raise and secure them
✓
QUESTION 11 / 25
If a spare tire is carried on converter gear, what should you check?
Choose one answer below.
A
That it is flat
✓
B
That it replaces safety chains
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C
That it is secured
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D
That it is loose for access
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QUESTION 12 / 25
What provides secondary securement between the dolly and trailer?
Choose one answer below.
A
Mud flaps
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B
Safety chains
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C
Reflective tape
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D
Cargo straps inside the trailer
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QUESTION 13 / 25
Before coupling, how should the rear trailer be secured?
Choose one answer below.
A
With brakes, wheel chocks, or spring brakes if equipped
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B
With marker lights only
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C
By leaving it in neutral
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D
By holding it by hand
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QUESTION 14 / 25
What surface is safest for coupling or uncoupling doubles?
Choose one answer below.
A
A steep downgrade
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B
Soft shoulder gravel
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C
A curved ramp
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D
Firm, level ground
✓
QUESTION 15 / 25
Why check trailer height before coupling?
Choose one answer below.
A
To make the landing gear look even
✓
B
To increase rearward amplification
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C
To let the fifth wheel lift the trailer slightly and lock the kingpin correctly
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D
To avoid connecting air lines
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QUESTION 16 / 25
What should a visual fifth-wheel coupling check confirm?
Choose one answer below.
A
Only that trailer doors are closed
✓
B
Jaws closed around the kingpin and locking parts secured
✓
C
Only that the plate is visible
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D
Only that tires are shiny
✓
QUESTION 17 / 25
What does a gentle tug test help confirm?
Choose one answer below.
A
The trailer is securely coupled
✓
B
Cargo is legal weight
✓
C
The ABS lamp is burned out
✓
D
Triples are legal on the route
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QUESTION 18 / 25
Which line is the trailer emergency or supply line?
Choose one answer below.
A
Blue service line
✓
B
Electrical light cord
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C
Fuel return line
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D
Red emergency line
✓
QUESTION 19 / 25
Which line carries service-brake control air?
Choose one answer below.
A
Red emergency line
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B
Seven-way electrical cord
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C
Blue service line
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D
Pintle chain
✓
QUESTION 20 / 25
What should be true of trailer light cords before moving?
Choose one answer below.
A
They hang loose
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B
They are firmly in sockets
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C
Only the first trailer is connected
✓
D
They are wrapped around the pintle latch
✓
QUESTION 21 / 25
What should be true of air lines and glad hands?
Choose one answer below.
A
Lines supported and glad hands properly connected
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B
Lines dragging on the road
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C
Glad hands connected only to the first trailer
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D
Glad hands intentionally leaking
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QUESTION 22 / 25
How should rear shut-off valves on the last trailer be positioned for travel?
Choose one answer below.
A
Open
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B
Half open
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C
Removed
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D
Closed
✓
QUESTION 23 / 25
What is the correct converter dolly air tank drain valve position for travel?
Choose one answer below.
A
Open
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B
Half open
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C
Closed
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D
Disconnected
✓
QUESTION 24 / 25
Why check air all the way to the back?
Choose one answer below.
A
Only tractor brakes need air
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B
All trailer brakes need air to work
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C
It measures fuel economy
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D
It proves landing gear is up
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QUESTION 25 / 25
What driving style helps prevent rollover with doubles and triples?
Choose one answer below.
A
Steer gently and go slowly around curves and ramps
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B
Make quick lane changes
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C
Brake hard in every curve
✓
D
Accelerate on off-ramps
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