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South Carolina
South Carolina CDL Double 1
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Q.1
Submit
Rims with welding repairs:
Are unsafe.
Are acceptable on tires in the rear of the vehicle.
Are acceptable only when carrying a heavy load.
Are acceptable in combination vehicles.
Q.2
Submit
Backing with a trailer is dangerous because:
It is difficult for the driver to see behind the trailer.
There may be extra weight in the front of the vehicle.
Cargo may fall out of the trailer.
Trailers are not made to be driven in reverse.
Q.3
Submit
When backing up while coupling a trailer, the tractor should be positioned:
Directly in front of the trailer.
Directly next to the trailer.
Parallel with the trailer.
Q.4
Submit
On a leaf spring:
Leaves should shift.
Leaves can be missing.
Leaves should not be broken.
Q.5
Submit
Air tank drains:
Allow rain water to enter the tanks.
Are used to drain water and oil from the air tanks.
Should never be opened.
Must remain open while driving.
Q.6
Submit
The most common type of foundation brake used is the:
S-cam drum brake.
C-cam drum brake.
G-cam disc brake.
P-cam disc brake.
Q.7
Submit
While inspecting coupling equipment before a trip, the air lines should not:
Be connected to the glad hands.
Have any slack.
Be secured.
Be leaking.
Q.8
Submit
When it is difficult to see, such as at dawn or dusk, what is the best way to make your vehicle more visible?
Use your high beam lights.
Use your low beam lights.
Use only your clearance lights.
Do not use any lights.
Q.9
Submit
When checking your tires, which of the following is not an issue to correct?
Too much air pressure
Too little air pressure
Radial and bias-ply tires used together
Tread depth of at least 4/32 of an inch on the front tires
Q.10
Submit
A fire extinguisher is a required piece of safety equipment.
True
False
Q.11
Submit
If you see lights ahead while driving in fog:
You can assume the lights are on the road.
It may be a reflection.
It may be an optical illusion.
The lights may not indicate where the road is as the vehicle may have pulled off the roadway.
Q.12
Submit
Most heavy vehicles use the ____ method when changing gears.
Double clutching
Double shifting
Triple clutching
Q.13
Submit
____ make up the emergency brake system.
Only parts of the parking brake system
Only parts of the service brake system
Parts of the parking and service brake systems
Q.14
Submit
Extremely hot temperatures can cause:
Tire failure.
A trailer to disengage.
Lights to malfunction.
Increased gas mileage.
Q.15
Submit
What color are ABS malfunction lamps?
Orange
Yellow
Green
Blue
Q.16
Submit
An Anti-Lock Braking System (ABS) will:
Allow you to drive faster than you would be able to otherwise.
Allow you to follow other vehicles more closely than you would be able to otherwise.
Allow you to drive less carefully than you would be able to otherwise.
Not decrease your stopping distance.
Q.17
Submit
In very hot weather, tires should be checked regularly because:
They may melt.
Air pressure may increase with the temperature.
The tread wears down extra quickly.
The lug nuts may loosen.
Q.18
Submit
In a set of triples, the shut-off valves at the rear of the middle trailer should be:
Removed.
Closed.
Polished.
Open.
Q.19
Submit
If you press the tractor air supply control and your trailer's spring brakes do not release, you should:
Inspect the air line connections.
Activate the Anti-Lock Braking System.
Turn the engine off and on again.
Q.20
Submit
Rust around wheel nuts may mean:
It rained recently.
The nuts are loose.
The nuts are too tight.
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