Freeze before other road surfaces.

Freeze, but only once the temperature drops significantly below 32 degrees Fahrenheit.

Freeze after other road surfaces freeze.

Have heaters to prevent them from freezing.

Texas CDL Double 1 - DMV Written Test Questions with Answers

Q.1

When turning quickly to avoid an object in the roadway, you should:

Apply your brakes as you steer.
Give yourself extra clearance by turning more than needed to miss the object.
Turn just enough to miss the object and avoid turning more.
Steer and accelerate at the same time.

Q.2

Most drivers are the least alert:

In the morning.
In cold weather.
At night.
After work.

Q.3

Before starting down a hill, be sure to:

Accelerate.
Switch into a high gear.
Sound your horn.
Switch into a low gear.

Q.4

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.5

The service air line is attached to the:

Relay valves.
Supply line.
Emergency air line.
Steering wheel.

Q.6

If you don't pull the dolly out from beneath the rear trailer before unlocking the pintle hook:

The tow bar may cause injury.
The landing gear may break.
The pintle hook may detach.
Nothing bad could happen.

Q.7

When a combination vehicle goes around a corner:

The turn should be made as tightly as possible.
The front and rear wheels move in different paths.
The rear wheels should run over the curb.
It is acceptable for street signs to be knocked over if they are too close to the road.

Q.8

Mirrors should be adjusted:

While moving.
When the trailers are straight.
When you are standing next to the vehicle.
By an assistant.

Q.9

What does the trailer air supply control look like?

It is a square blue knob.
It is a triangular yellow knob.
It is an eight-sided red knob.
It is a circular orange knob.

Q.10

For safety purposes, when should you turn off a retarder?

When the roadways are slippery
When you are carrying a passenger
When you are carrying a heavy load
When driving in heavy traffic

Q.11

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.12

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.13

When it is difficult for others to see your vehicle, such as at dawn or dusk, you can help other drivers by:

Turning your lights on.
Keeping your lights off.
Driving on the shoulder.
Waving an arm out the window.

Q.14

Push in the trailer air supply control to:

Activate the emergency brakes.
Deactivate the air brakes.
Sound the horn.
Supply the trailer with air.

Q.15

Improper coupling is:

Impossible.
Not a problem.
Not easily detected.
Very dangerous.

Q.16

During a static leakage test, the maximum leakage rate for a single vehicle with air brakes is ____ in one minute.

1 psi
2 psi
3 psi
4 psi

Q.17

All air tanks must include:

A drain valve.
A lock.
A trap door.
A warning sticker.

Q.18

When inspecting the trailers in double and triple combinations:

A driver should walk around the trailers.
A driver should remain in the cab.
A driver should use their mirrors.
A driver should board each trailer.

Q.19

If a trailer's spring brakes do not release when you push the tractor air supply control, you should:

Check the air line connections.
Release the pintle hook.
Replace the spring brakes.
Drive normally without checking anything.

Q.20

When you need to stop in an emergency, you should:

Lock the wheels and skid to a stop.
Stop in a way that keeps your vehicle in a straight line.
Stop in a way that turns your vehicle.
Expect your vehicle to slow down more quickly than usual.