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South Carolina
South Carolina CDL Knowledge Test Class A 1
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Q.1
Submit
Texting while operating a CMV is:
Illegal.
Acceptable on rural roads.
Acceptable for drivers contacting their employers.
Q.2
Submit
Header boards:
Should never be used.
Protect drivers from being hit by cargo.
Protect drivers' heads when they are entering the cab of a truck.
Q.3
Submit
If an aggressive driver is involved in a crash down the road, you should:
Pull over and yell at them.
Stop after the crash scene and report the other driver’s behavior to police.
Block the driver in with your vehicle.
Q.4
Submit
When inspecting underneath your vehicle for leaking fluids, you must look for all the following, except:
Fresh oil.
Coolant.
Grease.
Windshield wiper fluid.
Q.5
Submit
Headlights:
Are not usually necessary when driving at night.
Provide better light than the sun.
Should be on the high beam setting whenever possible.
Should always be on the high beam setting.
Q.6
Submit
In extremely hot conditions, you may have to:
Increase your speed to cool the engine.
Reduce your speed to prevent overheating.
Drain the engine coolant.
Follow other vehicles more closely than normal.
Q.7
Submit
Which of the following may result in an applicant being denied a hazardous materials endorsement?
They are considered a security threat by the Transportation Security Administration (TSA).
They are a lawful U.S. citizen.
They work for a foreign company.
They do not have perfect vision.
Q.8
Submit
When traveling down a steep downgrade:
The air brakes should be used.
The vehicle should be placed in a low gear and the driver should use engine braking.
The driver should continually downshift instead of using the brakes.
Q.9
Submit
Backing with a trailer is dangerous because:
It is difficult to see behind the vehicle.
Most trucks do not have the ability to go in reverse.
Cargo may fall out of the trailer.
Q.10
Submit
Hydraulic brakes can fail due to:
A loss of pressure.
Cold weather.
Driving uphill for long periods of time.
Grooves in the roadway.
Q.11
Submit
When conducting a check of the engine compartment during a vehicle inspection, you should not:
Check the engine oil level.
Check the coolant level.
Drain the brake fluid.
Q.12
Submit
When driving at night, you should do all of the following, except:
Make sure you are rested.
Make sure your glasses are clean.
Wear sunglasses.
Q.13
Submit
Laws about securing loads and regulating CMV weights may vary from state to state. During interstate travel:
The law of the state in which the trip originated takes precedence.
The law of the state the vehicle is in takes precedence.
The driver should request federal regulations to override conflicting state laws.
The driver can choose which state’s laws to follow.
Q.14
Submit
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.15
Submit
If taking the driving test and the route does not include a railroad crossing, you:
Will not have to do anything related to a crossing.
May have to explain how you would cross railroad tracks.
Will have to take the test again on a route that does include a railroad crossing.
Q.16
Submit
How long is a CDL valid?
One year
Two years
Four years
Five years
Q.17
Submit
An Anti-Lock Braking System (ABS):
Is not available for vehicles with air brakes.
Is not helpful in most driving situations.
Can help you maintain control when braking.
Q.18
Submit
How is the parking brake released?
By tapping on the brake pedal three times
By pushing in the brake control knob
By engaging the accelerator
By tapping the accelerator twice
Q.19
Submit
Areas of the road that are shaded:
Usually do not freeze.
Usually do not contain moisture, so they can’t freeze.
Will remain slick after ice on other areas of the road has melted.
Should always be avoided.
Q.20
Submit
When the brake pedal is pushed down, air brakes work:
Immediately.
After a short delay.
After about a minute.
Only if it is warm outside.
Q.21
Submit
Driving with a cargo of hanging meat in a trailer:
Is discouraged during the summer months.
Can be problematic because animals are attracted to the smell of the meat.
Is challenging because the load has a high center of gravity.
Q.22
Submit
Of the following, which is the most slippery surface?
Ice that is dry
Ice that is wet
Wet pavement
Q.23
Submit
When parked on the side of the road, you should:
Use only the rear flashing lights.
Use one set of turn signals.
Use your high beam headlights.
Use your four-way flashers.
Q.24
Submit
Emergency equipment in a vehicle is:
Only required for vehicles that are transporting hazardous materials.
Only required during interstate travel.
Required.
Q.25
Submit
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.26
Submit
Dry bulk tanks require special care because:
They have low centers of gravity.
They have high centers of gravity.
Loads are usually stable.
They are usually overloaded.
Q.27
Submit
If you must leave the roadway and drive on the shoulder in an emergency situation, you should:
Brake as hard as possible.
Get both sets of wheels onto the shoulder.
Stay on the shoulder until your vehicle has stopped, if possible.
Q.28
Submit
States verify that a CDL or CLP driver has only one such license by:
Making phone calls to surrounding states.
Using a computerized system that links all states.
Asking the driver.
Looking through the driver's wallet.
Q.29
Submit
Where can you find the tire load rating?
On the inside of the driver’s door
On the dashboard
On the side of each tire
Under the hood
Q.30
Submit
Which of the following is not a sign of a driver becoming tired?
Frequent blinking
Drifting from their lane
Feeling hungry
Q.31
Submit
Applying the brake pedal causes air pressure to activate an electric switch and:
Turn off the brake lights.
Turn on the low pressure warning light.
Turn on the brake lights.
Turn off the low pressure warning light.
Q.32
Submit
Convex mirrors:
Cannot be used on vehicles transporting hazardous materials.
Are illegal in most states.
Can help drivers see a larger area.
Q.33
Submit
A stopped bus:
Is not a cause for concern.
Is not a concern if passengers are not unloading.
Should not be on the roadway.
Is a concern, whether passengers are visible or not.
Q.34
Submit
What must be done if a load is over-length?
A warning flag must be placed on the end of the load.
The load may only be transported between 6 p.m. and 3 a.m.
The load must be shortened.
The emergency flashers must be activated.
Q.35
Submit
Which of the following is not an indication of damaged brakes?
Cracked drums
Shoes with oil or grease on them
Shoes worn thinly
Pads free of oil or grease
Q.36
Submit
Having weight loaded in a way that creates a high center of gravity:
Increases the likelihood of a rollover.
Increases the likelihood that items will fall down.
Increases the difficulty of unloading the cargo.
Q.37
Submit
A cardboard box on the roadway:
Should be expected to be on the roadway.
Is usually empty and harmless.
Could contain a heavy object that could damage vehicles.
Q.38
Submit
If using air tanks with manually operated drains, how often should you drain the tanks?
Every day
Once a week
Once a month
Once every six months
Q.39
Submit
Which of the following is not an example of a distracted person that motorists should be worried about?
A driver talking to a passenger in their vehicle
A child on the side of the road
A construction worker on the side of the road
A person sitting on a bench waiting for a bus
Q.40
Submit
A tread depth of ____ should be in every major groove of a tire that is not in the front of a commercial motor vehicle.
1/32 of an inch
2/32 of an inch
4/32 of an inch
Q.41
Submit
What can happen if the air pressure gets too low in an air brake system?
The brakes may squeak.
The brakes may stop working.
The brakes may be sluggish.
Q.42
Submit
Which of the following surfaces provides the least amount of traction?
Ice that is dry
Ice that is wet
Wet pavement
Dry pavement
Q.43
Submit
Strong winds usually cause the greatest issues for:
Flatbed trailers.
Lighter vehicles.
Heavier vehicles.
Q.44
Submit
During the steering box portion of the vehicle inspection test, you should not:
Ensure that the steering box is securely mounted.
Ensure that the steering box is free of leaks.
Look for missing bolts in the steering box.
Assume all cotter keys are present.
Q.45
Submit
When stopping:
The brake pedal should be pressed down gradually.
The brake pedal should be pushed down quickly.
The brake pedal should be pressed down repeatedly, but not held down continuously.
The amount of force required on the brake pedal will be the same each time you slow or stop.
Q.46
Submit
When using a turn signal, you should not:
Signal early.
Signal continuously.
Cancel the turn signal after completing the turn.
Allow the turn signal to stay on long after the turn has been completed.
Q.47
Submit
Broken suspension parts:
Should be repaired immediately.
Should be repaired, but not immediately.
Cannot be identified.
Q.48
Submit
If you have more than one license:
You are unlikely to be caught.
You are doing nothing wrong.
You will be penalized.
There is no way for authorities to find out.
Q.49
Submit
Before starting down a hill, be sure to:
Accelerate.
Switch into a high gear.
Sound your horn.
Switch into a low gear.
Q.50
Submit
An applicant will be denied a hazardous materials endorsement if they:
Are a U.S. citizen.
Are wanted for a misdemeanor.
Are wanted for certain felonies.
Already have a driver license.
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