Height warnings may be posted, but do not have to be.

Height warnings must always be posted.

Height warnings must be posted at least twice.

Is necessary to warm up parts of the engine.

Is encouraged to improve gas mileage.

Should be done on surfaces with poor traction.

Wyoming CDL Double 1 - DMV Written Test Questions with Answers

Q.1

On low bridges:

Height warnings must always be posted.
Height warnings must be posted at least twice.
Height warnings may be posted, but do not have to be.

Q.2

What is a shut-off valve?

A device that prevents air from escaping an air brake system
The ignition switch
An object connected to the spring brake system
A coupling device

Q.3

If another driver is following you too closely, you should do all of the following, except:

Avoid quick changes.
Increase the distance between you and the vehicle in front of you.
Speed up.
Avoid relying on tricks to help others pass.

Q.4

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.5

When driving with trailers, you should:

Make quick, sudden changes.
Avoid making sudden moves.
Accelerate by pushing the accelerator to the floor.

Q.6

____ are the cause of more than half of all accident-related truck driver deaths.

Truck rollovers
Motorcycles
Slippery roads
Pedestrians

Q.7

A truck should be parked:

So that it must be backed up to leave the space.
So that it can be pulled forward to leave the space.
On the grass.

Q.8

Both systems in a dual air brake systems share:

Air tanks.
Hoses.
Air lines.
An air compressor.

Q.9

Combination vehicles are usually:

Easier to drive than single commercial vehicles.
Lighter than single commercial vehicles.
More difficult to drive than single commercial vehicles.

Q.10

Driving a combination vehicle ____ than driving a single vehicle.

Is easier
Requires more driving skill
Is better for training
Is safer in inclement weather

Q.11

Which of the following is not a part of an air brake system?

A service brake system
A parking brake system
An emergency brake system
An axle brake system

Q.12

When checking your vehicle's lights before driving:

The vehicle should be running and in gear.
The engine should be turned off.
The check can be done from inside the vehicle.
The check can be done by looking at a reflection from a shiny surface.

Q.13

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.

Q.14

If the safety relief valve in the air brake system releases air:

The compressor needs more air.
The air pressure has become too high.
The brakes are fully operational.

Q.15

If hydraulic brakes fail, a driver can reduce their speed by:

Shifting into a higher gear.
Shifting into a lower gear.
Finding a hill.
Letting the truck run out of gas.

Q.16

Rough acceleration:

Can damage a vehicle.
Is necessary to warm up parts of the engine.
Is encouraged to improve gas mileage.
Should be done on surfaces with poor traction.

Q.17

Steering wheel play of more than ____ can make steering difficult.

10 degrees
25 degrees
50 degrees

Q.18

Rims with welding repairs:

Are not safe to be used.
Are acceptable to be used on tires on the rear of a vehicle.
Are acceptable to be used only when carrying a heavy load.

Q.19

An application pressure gauge shows:

How much air pressure is being applied to the brakes.
How much air pressure is available.
How much air pressure is required to stop a vehicle.

Q.20

When starting an engine:

The brakes will lock up.
Warning lights should turn on, then quickly turn off.
Coolant temperatures should decrease.