Nebraska CDL Combination 2 - DMV Written Test Questions with Answers - MCQGeeks.com

Q.1

The best way to notice if a trailer has begun to skid is to:

Ask another driver.
Use your mirrors to determine if the trailer has left the lane.
Look at the skid sensor.
Feel the tractor move.

Q.2

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.3

After finishing a pre-trip inspection, you should:

Leave the rear shut-off valves open.
Remove the service line valve.
Close the emergency line valve.
Leave the emergency line valve open.

Q.4

When traveling more slowly than 40 mph, maintain at least ____ of following distance per every 10 feet of your vehicle.

One second
Two seconds
Three seconds
Four seconds

Q.5

The ____ trailer is the most likely to turn over if a driver takes a turn too quickly.

Front
Last
Middle

Q.6

Using the trailer hand brake while experiencing a trailer jackknife will:

Stop the skid.
Straighten the trailer.
Increase traction.
Continue the skid.

Q.7

Rollovers happen when:

A truck driver is driving too fast.
The driver of a vehicle in front of a truck is moving to slowly.
A truck driver is driving too slowly.
ABS is working effectively.

Q.8

What does the tractor protection valve do?

Protects the tractor from being stolen
Protects the tractor from exceeding a set speed
Keeps air in the braking system, should the trailer break away or develop a leak
Ensures oil adequately lubricates the engine

Q.9

Having anti-lock brakes on only one axle:

Will not make a difference in braking.
Will provide increased control in braking.
Will likely cause the air brakes to malfunction.

Q.10

Pushing in the trailer air supply control will:

Supply the trailer with air.
Deactivate the air brakes.
Prevent the vehicle from skidding.

Q.11

When braking with ABS, you should:

Push the brake pedal harder than usual.
Push the brake pedal as you normally would.
Push the brake pedal more lightly than usual.

Q.12

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

Truck rollovers
Motorcycles
Slippery roads
Pedestrians

Q.13

Combination vehicles:

Often have taller trailers than single commercial vehicles.
Are usually lighter than single commercial vehicles.
Require more skill to drive than single commercial vehicles.

Q.14

Place the trailer air supply control in its "emergency" position to test:

The trailer emergency brakes.
A coupling device.
The anti-lock brakes.

Q.15

When connecting a converter dolly to a second trailer, the trailer height should be ____ the center of the fifth wheel.

Level with
Slightly higher than
Slightly lower than

Q.16

The trailer hand valve should:

Be used for parking.
Be used only to test the trailer brakes.
Be used together with the brake pedal.
Be used on slippery surfaces.

Q.17

When lightly loaded, combination vehicles:

Should not be driven.
Have reduced braking capabilities.
Will not rollover.
Should be loaded with most of the weight in the rear of the trailer.

Q.18

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.

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