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Virginia CDL Combination Practice Questions - Virginia CDL Combination Vehicles Test Exam
Practice mode
Question
1
of 25
QUESTION 1 / 25
Which Virginia manual section is listed for Class A Combination Vehicle study?
Choose one answer below.
A
Section 6-1: Combination Vehicles
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B
Section 2-1: Driving Safely
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C
Section 7-1: Doubles and Triples
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D
The Virginia school bus supplement
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QUESTION 2 / 25
Virginia DMV says CDL knowledge questions come from what source?
Choose one answer below.
A
Competitor practice-test sites
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B
The Virginia Commercial Driver's Manual
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C
Carrier company policy only
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D
Local road signs only
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QUESTION 3 / 25
What passing score does Virginia DMV require on CDL knowledge exams?
Choose one answer below.
A
At least 60% correct
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B
At least 70% correct
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C
At least 80% correct
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D
A perfect 100% score
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QUESTION 4 / 25
What vehicle group generally requires Class A combination knowledge?
Choose one answer below.
A
Only a straight bus
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B
Only a motorcycle with a trailer
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C
Only a passenger car
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D
A qualifying combination vehicle with a heavy towed unit
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QUESTION 5 / 25
What is the fifth wheel?
Choose one answer below.
A
The tractor coupling device that receives and locks the trailer kingpin
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B
The trailer electrical plug
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C
The landing gear gearbox
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D
The trailer rear axle set
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QUESTION 6 / 25
What is the kingpin?
Choose one answer below.
A
The red air supply knob
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B
The vertical pin under the trailer apron that locks into the fifth wheel
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C
The landing gear crank
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D
The trailer ABS lamp
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QUESTION 7 / 25
Before backing under a trailer, the fifth wheel jaws should be:
Choose one answer below.
A
Closed around nothing
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B
Removed from the fifth wheel
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C
Open and ready to receive the kingpin
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D
Blocked with a rag
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QUESTION 8 / 25
For proper coupling, trailer height should be:
Choose one answer below.
A
So high the kingpin misses the fifth wheel
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B
So low the tractor hits the trailer nose
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C
Irrelevant if air lines are connected
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D
Slightly low so the fifth wheel lifts the trailer as it backs under
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QUESTION 9 / 25
What is a tug test?
Choose one answer below.
A
A gentle pull against set trailer brakes to check the coupling lock
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B
A hard acceleration test on the highway
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C
A test of the trailer lights only
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D
A landing gear crank test
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QUESTION 10 / 25
What should follow a successful tug test?
Choose one answer below.
A
Skipping all further checks
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B
A visual check that the jaws lock around the kingpin and there is no gap
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C
Disconnecting both air lines
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D
Raising the trailer off the fifth wheel
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QUESTION 11 / 25
A visible gap between the trailer apron and fifth wheel can indicate:
Choose one answer below.
A
A normal air-brake condition
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B
A properly stowed electrical cord
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C
A dangerous high coupling
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D
A correct fifth wheel slide position
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QUESTION 12 / 25
Which glad hand color normally identifies the emergency or supply line?
Choose one answer below.
A
Blue
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B
Green
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C
White
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D
Red
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QUESTION 13 / 25
Which glad hand color normally identifies the service line?
Choose one answer below.
A
Blue
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B
Red
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C
Yellow
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D
White
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QUESTION 14 / 25
What does the trailer electrical cord primarily supply?
Choose one answer below.
A
Trailer spring brake air
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B
Trailer lights and electrical circuits
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C
Fifth wheel grease
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D
Landing gear lifting force
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QUESTION 15 / 25
When should landing gear be fully raised?
Choose one answer below.
A
Before the tractor is under the trailer
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B
After the first highway stop
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C
After proper coupling and before driving
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D
Only after unloading cargo
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QUESTION 16 / 25
What should be done with the landing gear crank handle before travel?
Choose one answer below.
A
Leave it swinging
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B
Tie it to an air hose
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C
Remove the handle and discard it
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D
Secure it in its holder
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QUESTION 17 / 25
What is off-tracking?
Choose one answer below.
A
Trailer rear wheels follow a tighter path than the tractor front wheels
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B
The trailer brakes pull left
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C
The tractor protection valve closes
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D
The electrical cord is unplugged
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QUESTION 18 / 25
Because of off-tracking, right turns require:
Choose one answer below.
A
Turning as tightly as possible
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B
Extra room so trailer wheels clear curbs and objects
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C
Using the hand valve through the turn
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D
Ignoring the right mirror
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QUESTION 19 / 25
Why do combinations need more following distance?
Choose one answer below.
A
They stop shorter than cars
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B
Their trailers steer independently
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C
They are long and heavy and may need more room to stop
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D
Virginia exempts them from speed laws
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QUESTION 20 / 25
What is a jackknife?
Choose one answer below.
A
The fifth wheel slides rearward normally
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B
The landing gear retracts
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C
The service line changes color
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D
The tractor and trailer fold toward each other at the coupling
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QUESTION 21 / 25
If locked trailer wheels cause a skid, what usually helps recovery?
Choose one answer below.
A
Release the brakes enough to let wheels roll
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B
Apply more trailer hand valve
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C
Set the parking brake
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D
Turn off the engine
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QUESTION 22 / 25
What is the safest backing speed for combinations?
Choose one answer below.
A
Fast enough to finish quickly
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B
Very slow, with stops to check the path
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C
Normal road speed
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D
As fast as the spotter walks
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QUESTION 23 / 25
Which backing method gives better visibility when available?
Choose one answer below.
A
Blind-side backing
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B
Backing with mirrors folded
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C
Sight-side backing
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D
Backing without a spotter in traffic
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QUESTION 24 / 25
When unsure about the area behind the trailer, the driver should:
Choose one answer below.
A
Assume the path is clear
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B
Back faster
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C
Turn off hazard lights
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D
Get out and look or use a qualified spotter
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QUESTION 25 / 25
For a sharp curve, a combination driver should:
Choose one answer below.
A
Slow before the curve and steer smoothly
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B
Brake hard in the middle of the curve
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C
Use the posted car advisory as a minimum
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D
Accelerate until the trailer sways
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