District of Columbia CDL Double 1 - DMV Written Test Questions with Answers - MCQGeeks.com

Q.1

If the low pressure warning light comes on while you are driving:

Braking will only be possible if there is still enough air in the tanks.
You can apply the brakes 14 times before the air in the system runs out.
You should continue to drive normally and check the brake system when it is convenient.
You should stay at least 100 feet away from other vehicles.

Q.2

After connecting the air lines to the trailer while coupling, you should:

Supply air to the trailer.
Chock the wheels.
Inspect the fifth wheel.
Connect the electrical cord.

Q.3

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.4

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.5

When stopped on the side of the road, the driver should:

Keep their side door open.
Turn on their emergency flashers.
Wave their arms.
Turn off all their lights.

Q.6

A vehicle inspection is required:

For insurance purposes.
To get fuel.
By state and federal law.

Q.7

Friction inside a brake drum is caused when the brake shoes and linings:

Create excess heat.
Push against each other.
Separate from the axle.
Push against the inside of the drum.

Q.8

Coupling can be tested by a driver:

Placing their fingers inside the coupling mechanism.
Pulling against the pin of the second semi-trailer.
Placing glue over the fifth wheel.
Releasing the orange lever in the cab.

Q.9

Joggers who are wearing headsets:

Are usually aware of what is happening around them.
May not be aware of what is happening around them.
Can clearly hear sounds of traffic.
Usually don’t have music playing.

Q.10

Poisonous fumes can enter a truck's cab due to:

A defective exhaust system.
The wrong type of fuel being used.
A lack of oil in the engine.
Under-inflated tires.

Q.11

After a trip:

A vehicle should be placed out-of-service.
A vehicle's oil should be changed.
A vehicle's after-trip inspection should be completed.
A vehicle's battery should be disconnected.

Q.12

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.13

If a truck is equipped, a trailer brake hand valve can be used to:

Add fuel to the vehicle.
Prevent the vehicle from rolling back when being started from a stop.
Check the oil level.
Load cargo.

Q.14

Regarding winter driving, all of the following are true, except:

Front tires should have a tread depth of at least 4/32 an inch.
Tires should be slightly deflated.
Rear tires should have a tread depth of at least 2/32 an inch.
Use a gauge to verify that each tire has a safe tread depth.

Q.15

Doubles and triples are:

More stable than straight trucks.
Most likely to turn over due to the "crack-the-whip" effect.
Easier to drive than other vehicles.
Less likely to be affected by wind than other vehicles.

Q.16

Test the tractor protection valve by:

Removing the air supply knob.
Removing the parking brake control knob.
Releasing air with the brake pedal.
Releasing air with the gas pedal.

Q.17

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.18

If your trailer goes off course while you are backing, you should:

Continue the backing process without changing anything.
Pull the truck forward, readjust, and start backing again.
Get out of the truck and move the trailer into the right position.
Turn the steering wheel all the way to the left until the trailer straightens out.

Q.19

Which of the following is required emergency equipment?

Red reflective triangles
A flashlight
An electric sign
Tape

Q.20

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.

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