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Georgia CDL Combination Test 1
Practice mode
Question
1
of 20
QUESTION 1 / 20
When connecting a converter dolly to a second or third trailer, the trailer height should be:
Choose one answer below.
A
Slightly higher than the center of the fifth wheel.
✓
B
Level with the center of the fifth wheel.
✓
C
Slightly lower than the center of the fifth wheel.
✓
D
Next to the center of the fifth wheel.
✓
QUESTION 2 / 20
Before a drive, ensure that air flows to all trailers by:
Choose one answer below.
A
Opening the rear shut-off valves and listening for escaping air.
✓
B
Closing the rear shut-off valves and listening for escaping air.
✓
C
Disconnecting air supply lines and listening for escaping air.
✓
D
Rolling each trailer down a hill and testing the brakes.
✓
QUESTION 3 / 20
What is another name for the service line?
Choose one answer below.
A
Control line
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B
Exchange line
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C
Surplus line
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D
Parallel line
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QUESTION 4 / 20
An Anti-Lock Braking System (ABS):
Choose one answer below.
A
Allows wheels to lock up.
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B
Prevents wheels from locking up.
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C
Makes it easier to turn a large vehicle.
✓
D
Assists with the operation of brake lights.
✓
QUESTION 5 / 20
Having ABS on only one axle:
Choose one answer below.
A
Does not change braking in any way.
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B
Is not possible.
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C
Will allow the driver additional control over their vehicle when braking.
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D
Will cause extra strain on the other axles.
✓
QUESTION 6 / 20
The trailer hand valve:
Choose one answer below.
A
Should always be used for parking.
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B
Should only be used for parking on a downhill.
✓
C
Should never be used for parking.
✓
D
Should only be used when transporting cargo.
✓
QUESTION 7 / 20
Rollovers happen when:
Choose one answer below.
A
A truck driver is driving too fast.
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B
The driver of a vehicle in front of a truck is moving to slowly.
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C
A truck driver is driving too slowly.
✓
D
ABS is working effectively.
✓
QUESTION 8 / 20
After connecting the air lines to the trailer while coupling, you should:
Choose one answer below.
A
Supply air to the trailer.
✓
B
Chock the wheels.
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C
Inspect the fifth wheel.
✓
D
Connect the electrical cord.
✓
QUESTION 9 / 20
A combination vehicle has:
Choose one answer below.
A
One air line.
✓
B
Two air lines.
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C
Three air lines.
✓
D
Four air lines.
✓
QUESTION 10 / 20
If a trailer is too high:
Choose one answer below.
A
It will not make a difference when coupling.
✓
B
It may not couple correctly.
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C
Coupling will be more secure.
✓
D
Coupling will be easier.
✓
QUESTION 11 / 20
Trailers with low underneath clearance may be difficult to drive:
Choose one answer below.
A
On interstate highways.
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B
Over railroad crossings.
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C
On dirt roads.
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D
At the posted speed limit.
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QUESTION 12 / 20
Combination vehicles:
Choose one answer below.
A
Are usually shorter than single commercial vehicles.
✓
B
Are usually lighter than single commercial vehicles.
✓
C
Require more skill to drive than single commercial vehicles.
✓
D
Are easier to drive than single commercial vehicles.
✓
QUESTION 13 / 20
What is off-tracking?
Choose one answer below.
A
When a vehicle’s front wheels follow a different path than its rear wheels
✓
B
When a vehicle's wheels all follow the exact same path
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C
When a load shifts during a turn
✓
D
When a vehicle's wheels run over a curb during a turn
✓
QUESTION 14 / 20
When backing up to couple a trailer, you should position the tractor:
Choose one answer below.
A
At a 90-degree angle in front of the trailer.
✓
B
Directly in front of the trailer.
✓
C
At a 30-degree angle in front of the trailer.
✓
D
At a 60-degree angle in front of the trailer.
✓
QUESTION 15 / 20
When coupling a trailer:
Choose one answer below.
A
Make sure to couple matching glad hands.
✓
B
Any glad hand can be connected to any other glad hand.
✓
C
It is best to leave one glad hand unattached.
✓
D
Only one set of glad hands should be connected.
✓
QUESTION 16 / 20
Proper coupling technique:
Choose one answer below.
A
Is the same on all vehicles.
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B
Is essential to the safe operation of a vehicle.
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C
Includes ensuring that the fifth wheel plate is not greased.
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D
Can be learned over time.
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QUESTION 17 / 20
After finishing a pre-trip inspection, you should:
Choose one answer below.
A
Close the service line valve.
✓
B
Remove the service line valve.
✓
C
Leave the emergency line valve open.
✓
D
Leave the rear shut-off valves open.
✓
QUESTION 18 / 20
Fully-loaded rigs:
Choose one answer below.
A
Are less likely to roll over than empty rigs.
✓
B
Are more likely to roll over than empty rigs.
✓
C
Are just as likely to roll over as empty rigs.
✓
D
Should not be driven.
✓
QUESTION 19 / 20
Pull out the trailer air supply control to test:
Choose one answer below.
A
The parking brake.
✓
B
The trailer emergency brakes.
✓
C
The trailer service brakes.
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D
The landing gear.
✓
QUESTION 20 / 20
A loss of air pressure in the emergency line will cause:
Choose one answer below.
A
The service brakes to activate.
✓
B
The tractor protection valve to close.
✓
C
The rear trailer to detach from the combination.
✓
D
The suspension springs to extend.
✓
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