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South Carolina
South Carolina CDL Knowledge Test Class B 2
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Q.1
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.2
Submit
The parking brake should be:
Used whenever you park the vehicle.
Used while driving.
Set when driving in bad weather.
Used to stop the vehicle in normal driving.
Q.3
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If you are driving in fog, you should not:
Turn on the four-way flashers.
Slow down.
Use your high beam lights.
Q.4
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You may be an aggressive driver if you:
Expect delays on your drive.
Slow down and maintain a reasonable following distance.
Make hand gestures that could anger other drivers.
Q.5
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Rough acceleration:
Is recommended.
Can cause mechanical damage.
Is required on slippery surfaces.
Q.6
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How could you reduce your stress while driving?
Drink a caffeinated beverage
Talk on your cell phone
Gesture at other drivers
Listen to calming music
Q.7
Submit
The driver of a commercial motor vehicle:
Can use any cell phone while driving.
Can only use a hands-free mobile phone while driving.
Can only use a cell phone on rural roads.
Can use a cell phone at night.
Q.8
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What happens if the air pressure in a system's air tanks falls below 60 psi?
A warning light will come on.
The vehicle will not shift out of gear.
The front lights will flash.
The vehicle should stop.
Q.9
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Antifreeze helps to keep an engine functioning properly:
But only in cold weather.
But only in hot weather.
Regardless of the weather.
While minimizing the vehicle's fuel use.
Q.10
Submit
Which of the following is not a warning sign of fatigue?
Staying within your lane
Difficulty focusing
Rubbing your eyes
Q.11
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If a speed limit is posted, the posted speed:
Should never be exceeded.
May be exceeded if passing another vehicle.
May be exceeded if driving in a rural area.
Q.12
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Anti-Lock Braking Systems (ABS):
Are not used on trucks.
Are only used on tucks carrying hazardous materials.
Allow drivers to stay in control when braking.
Q.13
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When the spring brakes are on, you should never:
Turn on the lights.
Turn off the vehicle.
Push down the brake pedal.
Q.14
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Most heavy-duty vehicles use:
Single air brake systems.
Dual air brake systems.
Triple air brake systems.
Quadruple air brake systems.
Q.15
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Truck tractors with air brakes built on or after March 1, 1997 must have:
An Anti-Lock Braking System (ABS).
Bluetooth.
GPS.
A rear back-up camera.
Q.16
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Of the following, which is the most slippery surface?
Ice that is dry
Ice that is wet
Wet pavement
Q.17
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When loading a trailer, weight should be:
Placed as high as possible.
Placed as low as possible.
Placed only on the left side, if possible.
Placed only on the right side, if possible.
Q.18
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When turning, you should:
Signal before the turn.
Turn off your turn signal just before starting the turn.
Signal only if vehicles are in front of you.
Q.19
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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.20
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Brake pads should:
Be covered with grease.
Be covered with oil.
Be covered with brake fluid.
Not have any oil or grease on them.
Q.21
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How can you prevent drowsiness before a trip?
Get about four hours of sleep.
Plan stopping points into your trip in advance.
Drive alone.
Schedule long trips at night.
Q.22
Submit
An exhaust system should be:
Loose.
Leaking.
Fastened securely.
Q.23
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When driving on packed snow, you should reduce your speed by:
One-half or more.
About one-third.
About one-quarter.
Q.24
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A steering wheel should be held:
With both hands.
With one hand, keeping the other hand free for other tasks.
With one hand at a time, alternating between hands.
At the base of the wheel.
Q.25
Submit
Rust around wheel nuts may mean:
It rained recently.
The nuts are loose.
The nuts are too tight.
Q.26
Submit
What is Gross Combination Weight?
The total weight of the powered unit, trailer, and cargo
The total weight of a single vehicle without its load
The maximum weight allowed by the manufacturer
Q.27
Submit
If your vehicle is equipped with a cargo lift, you should ensure that:
The lift is loosely attached.
The lift is not leaking.
The lift is fully extended.
The lift is the proper color.
Q.28
Submit
The parking brake should be:
Used whenever you park your vehicle.
Used while driving.
Set when driving in bad weather.
Removed.
Q.29
Submit
Blocking is used to:
Keep cargo in a large box.
Prevent cargo from sliding in a trailer.
Prevent cargo from falling out of a trailer.
Q.30
Submit
When starting the engine as part of the pre-trip inspection, the driver should:
Listen for unusual noises.
Rev the engine.
Turn up the radio.
Turn on the heater.
Q.31
Submit
Before driving a vehicle with air brakes, you should ensure that the ____ come on automatically when air pressure falls below 45 psi.
Spring brakes
Parking brakes
Air brakes
Q.32
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.33
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.
Q.34
Submit
When approaching a construction worker who is near the road, you should:
Increase your speed.
Decrease your speed.
Move to the shoulder.
Q.35
Submit
Rims with welding repairs:
Are not safe to use.
Are acceptable to be used on tires in the rear of the vehicle.
Are acceptable to be used if carrying a light load.
Q.36
Submit
When approaching your vehicle as part of a pre-trip inspection, seeing fresh oil underneath the vehicle is:
A good sign.
Normal.
A cause for concern.
Q.37
Submit
What can happen if a parking brake is used in very wet weather when temperatures are below freezing?
The brakes will squeak.
The brakes may freeze so the vehicle cannot move.
The brakes may suddenly release by themselves.
The brakes may explode.
Q.38
Submit
Once they have begun to drive after a tire on their vehicle has been changed, a driver should stop after a short distance to:
Ensure that the lug nuts are still tight.
Ensure that the tire is wearing evenly.
Ensure that the air pressure of the tire is still acceptable.
Q.39
Submit
To avoid a hazard, you:
Should always come to a complete stop.
May need to swerve your vehicle out of the way.
Should change lanes without looking.
Q.40
Submit
At least eight red reflective triangles must be carried within a commercial motor vehicle.
True
False
Q.41
Submit
Hydroplaning usually occurs:
When tires are properly inflated.
At speeds under 15 mph.
In areas where water collects on the road.
During the evening.
Q.42
Submit
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.43
Submit
Pre-trip inspections should be done:
Differently each time in order to place emphasis on different items.
The same way each time to prevent you from forgetting anything.
Once in a while.
Q.44
Submit
A sign indicating a maximum safe speed:
Is suggesting a driving speed, but vehicles may travel faster than the posted speed.
Is suggesting a speed limit to be followed only by vehicles weighing more than 26,000 pounds.
Should be followed and no vehicle should travel faster than the posted speed.
Is only applicable to automobiles.
Q.45
Submit
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.46
Submit
If you must stop on the side of a one-way or divided highway, how far behind your vehicle should you place warning devices?
10, 15, and 30 feet
10, 25, and 50 feet
10, 100, and 200 feet
Q.47
Submit
In order to receive a hazardous materials endorsement, a person must complete all of the following, except:
A HazMat knowledge test.
An FBI fingerprint check.
A CIA intelligence check.
Q.48
Submit
If a tire rim is damaged, it should be:
Left on the vehicle.
Welded to repair the damage.
Replaced.
Put on the axle farthest from the driver.
Q.49
Submit
When driving in winter, which of the following should receive extra attention in a pre-trip inspection?
Coolant and antifreeze levels
The air conditioning unit
The oil pressure
Q.50
Submit
Hydraulic brakes can fail for one of two reasons. Which of the following is one of those reasons?
There is a loss of hydraulic pressure.
You are driving uphill.
The brakes get too cold.
The brakes are used too much in one day.
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