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Driving Test
Maine
Maine CDL Combination 2
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Q.1
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The trailer hand valve:
Should always be used for parking.
Should only be used for parking on a downgrade.
Should never be used for parking.
Q.2
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The trailer hand valve should not be used while you are driving because:
It will disconnect from the vehicle.
You will stop the vehicle too quickly.
It can cause a skid.
Q.3
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If you cannot reverse your trailer in a straight path, you should:
Swerve back and forth while backing.
Back toward the driver's side.
Back toward the passenger's side.
Q.4
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When backing up your tractor while coupling it to a trailer, the trailer brakes should be:
Deactivated.
Locked.
Unlocked.
Q.5
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After completing a pre-trip inspection, you should ensure that the:
Service line valve is closed.
Trailer hand brake is applied.
Emergency line valve is open.
Q.6
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What is a bobtail tractor?
A tractor without a trailer
A tractor attached to two trailers
A tractor with a tank
Q.7
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When glad hands are coupled, the seals should be pressed together at a ____ angle.
50-degree
180-degree
90-degree
Q.8
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The emergency air line supplies air to the:
Relay valves.
Trailer air tanks.
Signal line.
Q.9
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Place the trailer air supply control in its "emergency" position to test:
The trailer emergency brakes.
A coupling device.
The anti-lock brakes.
Q.10
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The "crack-the-whip" effect can:
Turn over a trailer.
Be more effective than braking.
Make a truck move faster.
Q.11
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Older trailers are not equipped with spring brakes. This means that if the air supply for a vehicle's air braking system leaks away:
The trailer will stop normally.
The trailer will not have brakes.
The trailer will speed up.
Q.12
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When testing ____, you should apply your vehicle's brakes with the hand control while moving the vehicle forward slowly.
The Anti-Lock Braking System
The emergency braking system
The trailer service brakes
Q.13
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Having anti-lock brakes on only one axle:
Will not make a difference in braking.
Will provide increased control in braking.
Will likely cause the air brakes to malfunction.
Q.14
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Bobtail tractors are ____ to stop than tractors attached to full semitrailers.
Quicker
Easier
More difficult
Q.15
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If you must cross traffic while driving a combination vehicle, you should:
Assume other drivers will make room for your vehicle.
Wait for a gap large enough for your vehicle to safely cross.
Rely only on your mirrors.
Q.16
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If a trailer begins to jackknife, the driver:
Should not apply the trailer hand brake.
Should firmly apply the brakes.
Can straighten the trailer with the parking brake.
Q.17
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A trailer that is too high:
May not couple correctly.
Will couple securely.
Is not an issue.
Q.18
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The trailer hand valve should be used:
To test the trailer brakes.
To check the connection between the trailer and tractor.
To accelerate.
Q.19
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If the emergency air line loses pressure:
The service brakes will activate.
The tractor protection valve will close.
The rear trailer will detach from the combination.
Q.20
Submit
Keeping cargo centered on a rig can:
Help you drive faster.
Prevent a rollover.
Make turns more dangerous.
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