North Carolina CDL Double 1 - DMV Written Test Questions with Answers - MCQGeeks.com

Q.1

Belts in the engine compartment should be:

Frayed.
Tight.
Greasy.
Easy to slide off.

Q.2

Fully-loaded rigs:

Are less likely to roll over than empty rigs.
Are more likely to roll over than empty rigs.
Are just as likely to roll over as empty rigs.
Should not be driven.

Q.3

When you leave your vehicle, you should:

Apply the parking brake.
Apply the air brake.
Not apply any brake.
Leave the door open.

Q.4

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.5

The air compressor is connected to the:

Transmission.
Engine.
Radiator.

Q.6

If the emergency air line loses pressure:

The service brakes will activate.
The tractor protection valve will close.
The rear trailer will detach from the combination.

Q.7

If the brakes “pull” to one side or the other when you use them, it's a sign that:

The brakes are working properly.
The brakes need to be checked.
The brakes are new.
The brakes have too much stopping power.

Q.8

When preparing to drive in the winter, be sure to check:

The coolant level.
The defrosting and heating equipment.
The windshield wipers.
All of the above.

Q.9

To stop in a vehicle that uses air brakes, the driver should:

Pull the air brake lever.
Engage the brake lever.
Push the brake pedal down.
Pull the brake pedal up.

Q.10

If you are driving so slowly that you could impede other vehicles, you should:

Stay in the left lane.
Drive with your emergency flashers activated.
Not use any lights.
Wave an arm out of your window.

Q.11

If you’re not sure what to do to extinguish a fire in your vehicle, you should:

Use water.
Stay inside the vehicle.
Wait for the firefighters.

Q.12

Before attempting to put out an engine fire:

The hood should be opened.
The engine should be turned off.
The accelerator should be depressed to use up the remaining fuel.

Q.13

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

A commercial motor vehicle driver:

May use any cell phone while driving.
May only use a hands-free cell phone while driving, if permitted.
May only use a cell phone while driving on rural roads.

Q.15

In a vehicle equipped with an automatic tractor protection valve, the valve will pop out when:

Air pressure drops to a level between 20 and 45 psi.
You are experiencing a trailer jackknife.
Wheels have regained traction after a skid.
Air pressure is above 45 psi.

Q.16

Emergency air lines are often coded with the color:

Green.
Orange.
Yellow.
Red.

Q.17

Service brakes should:

Be tested once a month.
Only be tested by a trained mechanic.
Be tested before every trip.

Q.18

What may happen if the exhaust system is not working properly?

Poisonous fumes may enter the cab.
Poisonous fumes may exit the rear of the muffler system.
It may prevent proper steering.
It may cause problems if the trailer is fully loaded.

Q.19

Pull out the trailer air supply control, or set it in the "emergency" position, when testing:

The trailer emergency brakes.
The parking brake.
The trailer service brakes.
The landing gear.

Q.20

When starting your vehicle, the coolant temperature should:

Not change.
Increase gradually.
Quickly jump from low to high.

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