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North Carolina
North Carolina CDL Knowledge Test Class A 1
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Q.1
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What is Gross Vehicle Weight (GVW)?
The total weight of a vehicle and its load
The total weight of a vehicle's tractor
The total weight of a loaded trailer
The weight of a tractor and trailer, before adding in the load
Q.2
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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
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The air storage tanks:
Hold only enough air for one braking cycle.
Hold enough air for brakes to be used several times if the compressor stops working.
Do not hold air unless there is an emergency.
Hold enough air for more than 1,000 braking cycles.
Q.4
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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.5
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When driving with a load, the driver should:
Stop and check on the cargo within the first 50 miles of the trip.
Ask other drivers about the condition of their load.
Use the side mirrors only to check on the cargo.
Not check on the cargo if it was secured properly before starting the trip.
Q.6
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If driving on a surface with poor traction, a driver should accelerate slowly:
Because it is always good to accelerate slowly.
To keep from losing control of the vehicle.
So that they do not accelerate faster than the vehicle ahead.
Q.7
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Driving in extremely hot weather:
Should not be done.
Requires you to remove oil from the engine.
Is safer with less coolant.
Can increase tire pressure.
Q.8
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If a load is 40 feet long, it must be secured by a minimum of ____ tie-downs.
Two
Three
Four
Five
Q.9
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During the driving test, when encountering a railroad crossing, you should:
Pass another vehicle on the tracks if the other vehicle is going too slow.
Get out of the vehicle to check for a train.
Not change gears while your vehicle is on the tracks.
Q.10
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If the spring brakes are activated, you should never:
Push down the brake pedal.
Open the hood.
Release air from the air storage tanks.
Open the door to the cab.
Q.11
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If involved in a crash, basic procedures should include all of the following, except:
Protecting the area.
Notifying the proper authorities.
Caring for the injured.
Driving away without stopping.
Q.12
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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.13
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What should you do if your vehicle gets stuck on railroad tracks?
Stay in the vehicle.
Get out of the vehicle and call for assistance.
Continue trying to get your vehicle off the tracks until you are successful.
Q.14
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Header boards:
Should never be used.
Protect the driver from being hit by cargo.
Protect the driver's head when entering the cab of a truck.
Provide extra storage.
Q.15
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If your truck or trailer catches fire, you should:
Park in a congested area near trees.
Pull into a service station.
Park near other vehicles.
Park in an open area.
Q.16
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While still below the legal limit, a driver operating a CMV with a detectable amount of alcohol in their system will:
Result in an out-of-service order for two hours.
Result in an out-of-service order for 10 hours.
Result in an out-of-service order for 24 hours.
Q.17
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Which of the following is not a type of distraction?
Physical
Mental
Obtuse
Q.18
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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.19
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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.20
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If the spring brakes are on, you should:
Not use the brake pedal.
Press the accelerator.
Move the steering wheel.
Q.21
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When leaving your vehicle unattended:
The parking brake should be used.
The parking brake only needs to be used if the vehicle is parked on a slope.
The parking brake should not be used, as it can damage the tires.
Q.22
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When checking the engine compartment:
The parking brake should not be engaged.
Wheels should be chocked.
The engine should be running.
The gearshift should be in first gear.
Q.23
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When inspecting underneath your vehicle for leaking fluids, you must look for all the following, except:
Fresh oil.
Coolant.
Grease.
Windshield wiper fluid.
Q.24
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What color is the low air pressure warning light?
Green
Orange
Red
Purple
Q.25
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Bridges usually:
Freeze, but only once the temperature drops significantly below 32 degrees Fahrenheit.
Freeze after other road surfaces freeze.
Freeze before other road surfaces.
Have heaters to prevent them from freezing.
Q.26
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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.27
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A distracted driver:
Usually follows the rules of the road.
Usually has slowed perception.
Is a good person to follow.
Q.28
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Test the low pressure warning signal:
Once a month.
Once a week.
Twice a week.
Before every trip.
Q.29
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If you remain in neutral for too long while switching gears:
The vehicle will speed up.
You may have trouble putting the vehicle into the next gear.
You may kill the engine.
Q.30
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How can a driver maintain alertness while driving?
Stay fit and healthy
Keep the cab warm
Eat heavy foods
Q.31
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Blocking is used to:
Prevent cargo from shifting.
Prevent cargo from being loaded too high.
Prevent cargo from being unloaded too quickly.
Q.32
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Poisonous fumes can enter a cab due to:
A defective exhaust system.
Using the wrong type of fuel.
A lack of oil in the engine.
Q.33
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Loading cargo onto a vehicle:
Must be done by the driver.
May be done by a person other than the driver, and they become responsible for the safety of the cargo.
May be done by a person other than the driver, but the driver is responsible for the safety of the cargo.
Must be done by a professional loader.
Q.34
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Vehicles with dual air brake systems:
Maintain full-capacity air pressure in the braking systems even when the vehicle is not running.
Maintain some air pressure in the braking systems when the vehicle is not running.
Must be run to build enough air pressure to brakes to operate properly.
Do not need time to build air pressure before a trip.
Q.35
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Where is the safety relief valve usually located?
Near the rear brake
Near the front brake
In an air tank
On the dashboard
Q.36
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How should you check your hydraulic brakes?
Pump the brakes three times, then apply firm pressure to the brake pedal for five seconds. The brake pedal should not move.
Pump the brakes three times, then apply firm pressure to the brake pedal for five seconds. The brake pedal should slowly move toward the floor.
Pump the brakes three times, then apply firm pressure to the brake pedal for five seconds. The brake pedal should slowly rise.
Pump the brakes three times, then apply firm pressure to the brake pedal for five seconds. The brake pedal should be easy to push to the floor.
Q.37
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When checking the power steering fluid during a vehicle inspection, you will need to do each of the following, except:
Show where the power steering fluid dipstick is located.
Check for adequate power steering fluid.
Ensure that the power steering fluid level is above the full mark.
Ensure that the power steering level is above the refill mark.
Q.38
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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.39
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Your vehicle's final position should be:
Exactly where the examiner has instructed it to be.
Within five feet of the final position described by the examiner.
Wherever you can safely park.
Within two feet of the final position described by the examiner.
Q.40
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Dual tires should:
Always come into contact with one another.
Come into contact with one another fairly regularly.
Not come into contact with one another.
Q.41
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When using a fire extinguisher on a fire, you should:
Get as close to the fire as possible.
Stand as far away from the fire as possible.
Aim the extinguisher at the top of the fire.
Q.42
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When changing lanes, turn signals:
Should not be used.
Should only be used if a vehicle is close to you.
Should be used each time.
Q.43
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With the exception of the straight line backing exercise, a driver may exit their vehicle and check its position during testing exercises up to:
One time.
Two times.
Three times.
Q.44
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When traveling down a downgrade, the speed of a vehicle will likely:
Decrease.
Stay the same.
Increase.
Q.45
Submit
A header board is used to:
Allow a driver to see behind them.
Protect the driver from moving cargo.
Provide extra storage capacity.
Prevent the driver from leaving the tractor.
Q.46
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If the safety relief valve in an air brake system is releasing air:
You should not be concerned as this is a normal process.
There is something wrong with the brakes.
The valve is operational.
Q.47
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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.48
Submit
During a static leakage test, the maximum leakage rate for a triple combination vehicle with air brakes is ____ in a minute.
3 psi
5 psi
7 psi
9 psi
Q.49
Submit
The minimum acceptable tread depth for rear tires is:
1/64 of an inch.
1/32 of an inch.
2/32 of an inch.
Q.50
Submit
When entering a foggy area, you should:
Stop on the side of the roadway.
Pass other vehicles.
Slow down.
Use your high beam headlights.
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