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South Carolina
South Carolina CDL Knowledge Test Class A 2
Answers
Q.1.
If you are not sure if there is enough space for your vehicle to safely pass under a bridge, you should:
Speed up.
Swerve as you pass under the bridge.
Slow down.
Drive on the shoulder.
Q.2.
What can change the height of a vehicle?
Color
Length
Weight
Number of windows
Q.3.
An air compressor governor will stop the compressor from pumping air once the air tanks have an air pressure level of:
125 psi.
100 psi.
150 psi.
80 psi.
Q.4.
How much water must be on a road surface for a vehicle to hydroplane?
Usually several inches
A good amount, such as a large puddle
A small amount
None
Q.5.
What color is the low air pressure warning light?
Green
Orange
Red
Purple
Q.6.
Texting while driving is especially dangerous because:
It is both a mental and physical distraction.
A message may be upsetting to the driver.
People like to read and may become too engaged in their phones.
Q.7.
Talking on a hands-free phone while driving:
Does not distract the driver.
Only distracts the driver if the driver is speaking.
Can be distracting to the driver.
Q.8.
In very hot weather, the air pressure in tires may decrease.
True
False
Q.9.
If equipped, a header board should:
Be damaged.
Be loose.
Be strong enough to contain cargo.
Light up when the engine is started.
Q.10.
The ____ between an air compressor and reservoir tank prevents air from escaping if the air compressor has a leak.
Slack adjuster
One-way check valve
Tractor protection valve
Q.11.
If an approaching driver is using their high beam headlights, you should:
Look directly at the headlights.
Flash your high beam lights to remind the driver to switch to their low beams.
Look to the right side of your lane until the vehicle has passed.
Pull to the side of the road until the vehicle has passed.
Q.12.
Tires with deep cracks are usually acceptable.
True
False
Q.13.
If a load is 40 feet long, the minimum number of tie-downs required to secure the load is:
Two tie-downs.
Three tie-downs.
Four tie-downs.
Q.14.
To ensure normal stopping power, drivers of vehicles equipped with a front brake limiting valve should:
Set the control to normal.
Set the control to the off position.
Set the control to neutral.
Keep the control at the halfway mark.
Q.15.
When traction is poor, a driver should accelerate slowly:
Because it is best to always accelerate very slowly.
So they do not lose control of their vehicle.
So the driver does not accelerate faster than the vehicle ahead.
To be the last vehicle through an intersection.
Q.16.
Using a helper when backing is:
Encouraged.
Discouraged.
Illegal in most states.
Usually a cause of problems.
Q.17.
How much distance will an air brake-equipped vehicle need to come to a complete stop if it is traveling at 55 mph under ideal driving conditions?
300 feet
100 feet
450 feet
Q.18.
If there is a fire in your vehicle, you should not:
Park in an area away from buildings, trees, brush, and other vehicles.
Pull into a service station.
Notify emergency services of your problem and your location.
Q.19.
You should check and adjust your mirrors:
Before driving.
While driving.
After driving.
Q.20.
To avoid a collision with a hazard on the roadway:
You should always try to stop.
Swerving may be a safer option than stopping.
You should never swerve.
Q.21.
When traveling down a downgrade, the speed of a vehicle will likely:
Decrease.
Stay the same.
Increase.
Q.22.
When turning, when should the turn signal be canceled?
Before entering the turn
During the turn
After the turn is completed
Q.23.
Blocking cargo:
Should never be done.
Should be done to prevent the shifting of cargo.
Can only be done with metal pieces.
Q.24.
After a tire has been changed, the driver should stop after a short distance of driving to:
Recheck the tightness of the lug nuts.
See if rocks have gotten into the tread.
Polish the tire.
Q.25.
If driving a vehicle with a manual transmission, you can prevent your vehicle from rolling backward when starting from a stop by:
Partly engaging the clutch before removing your foot from the brake pedal.
Placing the vehicle in reverse before moving forward.
Fully engaging the clutch before removing your foot from the brake pedal.
Placing the vehicle in neutral before moving forward.
Q.26.
If other vehicles are having a difficult time getting around your truck on a road with two or more lanes, you should:
Speed up.
Drive on the shoulder.
Use the right lane.
Q.27.
When traveling at speeds under 40 mph, you should maintain at least ____ of following distance for every 10 feet of your vehicle's length.
One second
Two seconds
Three seconds
Q.28.
If air pressure drops to a level between ____, a visual low pressure warning signal should have already activated.
55 and 75 psi.
80 and 95 psi.
65 and 100 psi.
Q.29.
A vehicle inspection is required:
For insurance purposes.
To get fuel.
By state and federal law.
Q.30.
Using the brakes creates heat. If too much heat is produced:
The brakes may not work.
The brakes may squeak more than usual.
The brakes will brake unevenly.
Q.31.
During a basic vehicle control skills test, a look is when:
A driver checks the gauges on their instrument panel.
A driver checks their blind spots.
A driver walks to the back of their vehicle to check its position.
Q.32.
During a static leakage test, what is the maximum leakage rate that is safe for a double combination vehicle?
3 psi in one minute.
6 psi in one minute.
8 psi in one minute.
Q.33.
Hanging meat in a refrigerated truck:
Is a good way for inexperienced drivers to gain experience.
Requires a skilled driver.
Is illegal in most states.
Q.34.
If the coolant temperature gauge goes above the highest safe temperature, you should:
Continue to drive.
Pull over and figure out what's wrong.
Run the air conditioner.
Q.35.
During the driving test, the examiner will be scoring you on:
How well-spoken you are.
How quickly you arrive to your destination.
General driving behavior.
Q.36.
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.37.
Which of the following is not a warning sign of fatigue?
Frequent blinking
Rubbing your eyes
Missing exits or traffic signs
Staying within your lane
Q.38.
Most heavy trucks with manual transmissions require ____ to change gears.
Single clutching
Double clutching
Triple clutching
Q.39.
Sending text messages while driving:
May be done if the messages are short.
Is encouraged.
Is permitted if you are asking a question of your employer.
Is not permitted.
Q.40.
If a vehicle is equipped with power steering, you should inspect:
The hoses.
The pumps.
Both of the above.
Q.41.
Mirrors should be adjusted:
While moving.
When the trailers are straight.
When you are standing next to the vehicle.
By an assistant.
Q.42.
When completing an offset back/left parking maneuver, a driver should:
Pull straight forward, then back to the left.
Drive straight back, then pull forward to the left.
Pull straight forward, then drive straight back.
Q.43.
If a driver begins to feel fatigued while driving, they should:
Continue driving.
Drink coffee.
Stop and rest.
Drive faster to finish the trip more quickly.
Q.44.
When preparing to enter traffic, you should do all of the following, except:
Wait for a large gap between vehicles.
Be prepared for your vehicle to accelerate slowly, especially if it is loaded.
Make sure you can completely cross traffic, if necessary, without interfering with traffic.
Assume other drivers will make room for your much larger vehicle.
Q.45.
When transporting cargo, drivers must check the securement of the cargo every:
10 miles.
150 miles.
500 miles.
Q.46.
Parked delivery trucks may be hazardous because:
The trucks are often shiny.
People are often in a hurry when exiting such trucks and may not look for other vehicles.
Packages often fall out of the trucks and into the road.
Q.47.
Which of the following is not a strategy to avoid becoming an aggressive driver?
Not expecting delays on a drive
Maintaining a reasonable following distance
Keeping your hands on the wheel
Avoiding gesturing at other drivers
Q.48.
Tie-downs are used to:
Prevent cargo from shifting.
Prevent skidding.
Keep doors closed while driving.
Q.49.
Before beginning to drive downhill, you should:
Take your vehicle out of gear.
Shift into a lower gear.
Move into the left lane.
Q.50.
Distracted driving:
Is not a concern.
Only happens when drivers are physically doing something, like using a cell phone.
Can occur due to mental activities, such as daydreaming.
Is encouraged on uncrowded roads.
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