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Arizona
Arizona CDL Combination 2
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Q.1
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If a load is placed on one side of a trailer, the trailer:
May lean during turns.
May add extra support during turns.
May be easier to steer during turns.
Q.2
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To find out if a vehicle that was built before 1998 has an Anti-Lock Braking System (ABS), you can:
Pump the air brakes to activate the ABS.
Look into the back of the fifth wheel.
Check for wheel speed sensors coming from the back of the brakes.
Q.3
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What is a tractor protection valve?
A valve to keep air in the brake system should there be a bad leak
A valve that prevents a truck from being stolen
A valve that prevents the driver from driving too fast
Q.4
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If a parked trailer does not have spring brakes, you should keep the trailer from moving by:
Having the vehicle parked against a wall or other vehicle.
Using chock blocks.
Parking on a slight incline.
Q.5
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Before a trip, you can make sure air flows to all trailers by:
Checking for moving air inside of each trailer.
Listening for air at the rear shut-off valve.
Feeling for air at the front shut-off valve.
Q.6
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If color-coded, which color is used to identify emergency, or supply, lines?
White
Yellow
Red
Q.7
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If color-coded, which color is used to identify service lines?
White
Yellow
Blue
Q.8
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Rollovers happen when:
Drivers turn too quickly.
Drivers turn too slowly.
It is raining.
Q.9
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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.10
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Fully-loaded rigs:
Are less likely to roll over than empty rigs.
Are more likely to roll over than empty rigs.
Are just as likely to roll over as empty rigs.
Q.11
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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.12
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Trailers built before ____ are not required to have spring brakes.
1985
1975
1999
Q.13
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When a vehicle goes around a corner, the rear wheels:
Follow the same path as the front wheels.
Follow a different path than the front wheels.
Should not be a concern to the driver.
Q.14
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In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when air pressure drops to a level between:
20 and 45 psi.
75 and 105 psi.
50 and 65 psi.
Q.15
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A driver should test the tractor protection valve by:
Pulling the yellow, diamond-shaped knob.
Releasing air with the brake pedal.
Unlocking the trailer doors.
Q.16
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Keeping cargo low can:
Prevent a rollover.
Help you drive faster.
Make turns more dangerous.
Q.17
Submit
A tractor protection valve:
Keeps air in a brake system if there is a bad leak.
Prevents a truck from being stolen.
Prevents a trailer from being accidentally released.
Q.18
Submit
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.19
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When driving a vehicle equipped with an Anti-Lock Braking System (ABS), brakes should be applied:
In the same way as they would be in a vehicle without ABS.
As the vehicle is placed in neutral.
With the hand brake.
Q.20
Submit
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.
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