Have a fire extinguisher and other emergency equipment.

Not have a fire extinguisher, unless it is being used to transport hazardous materials.

Not have a fire extinguisher, unless it will be traveling through remote areas.

Wisconsin CDL Double 1 - DMV Written Test Questions with Answers

Q.1

Pressing and releasing a brake pedal unnecessarily can:

Release air faster than it can be replaced.
Add more air to the braking system.
Make the brake pedal more sensitive.
Create a loud noise.

Q.2

The air compressor is connected to the:

Transmission.
Engine.
Radiator.

Q.3

If you are braking on dry pavement while traveling at 55 mph, how much distance will brake lag add to your overall stopping distance?

32 feet
45 feet
20 feet

Q.4

Air lines should be securely connected to:

The fifth wheel.
The proper glad hands.
The kingpin.
The pintle hook.

Q.5

Mirrors should be adjusted:

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

Q.6

Most heavy-duty vehicles use ____ air brake systems.

Single
Dual
Triple
Quad

Q.7

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.

Q.8

Before a trip, make sure the glide plate is:

Detached from the vehicle.
Far from the upper fifth wheel.
Securely mounted to the trailer frame.

Q.9

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.10

When parking, you should:

Share a parking lot with automobiles.
Park in a way that will prevent you from having to back up.
Ask drivers of smaller vehicles to move.

Q.11

What is a bobtail tractor?

A tractor without a trailer
A tractor attached to two trailers
A tractor with a tank

Q.12

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.13

If there is a cargo fire in a box trailer:

The trailer doors should be opened.
The trailer doors should not be opened.
A large, heavy blanket should be put over the trailer.

Q.14

Which type of brakes do most heavy-duty vehicles have?

Air brakes
Solid brakes
Liquid brakes
Gravity brakes

Q.15

When traveling down a downgrade, the speed of a vehicle will likely:

Decrease.
Not change.
Increase.
Match the speed of traffic.

Q.16

A CMV should:

Not have a fire extinguisher, unless it is being used to transport hazardous materials.
Not have a fire extinguisher, unless it will be traveling through remote areas.
Have a fire extinguisher and other emergency equipment.

Q.17

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.18

When inspecting a power steering-equipped vehicle, you should be sure that:

The fluid is at the proper level.
The hoses are connected to the battery.
The hoses do not contain any fluid.
Only small leaks are present.

Q.19

If you are turning left and there are two available left turn lanes, which lane should you choose?

The left lane
The right lane
Either lane
Trucks should not turn where there are two left turn lanes.

Q.20

Hydroplaning usually occurs:

When tires are properly inflated.
At speeds under 15 mph.
In areas where water collects on the road.
During the evening.