Nebraska CDL Air Brakes 1 - DMV Written Test Questions with Answers - MCQGeeks.com

Q.1

Foundation brakes are used:

Only at the front wheels.
Only at the rear wheels.
Only at the driver’s side wheels.
At each wheel.

Q.2

A tank endorsement is:

Only required when transporting gases.
Only required when transporting liquids.
Used when transporting both liquids and gases.
Optional when transporting hazardous materials.

Q.3

If you’re driving and the ABS warning light comes on, it means:

The ABS is working properly.
The ABS has just been activated.
The ABS is not working properly.
The ABS needs to be activated.

Q.4

When you press the brake pedal in a vehicle with S-cam brakes, air pressure pushes out the rod and moves the:

Slack adjuster.
Axle.
Brake drum.
Alcohol evaporator.

Q.5

You should test the low pressure warning signal by:

Turning on the engine and applying the trailer hand brake.
Rapidly pressing and releasing the brake pedal.
Removing wheel chocks and disengaging the parking brake.

Q.6

The leakage rate for a single vehicle with air brakes should be no more than ____ in one minute during a static leakage test.

1 psi
2 psi
3 psi

Q.7

Which of the following is not part of a vehicle’s air brake system?

Air gauges
Low pressure warning device
Air filter

Q.8

What should happen if the air pressure in the air brake system tanks falls below 60 psi?

A warning light should come on.
Lights should flash on the outside of the vehicle.
A message should appear on the control panel.
The vehicle should stop.

Q.9

What can happen if the air pressure gets too low in an air brake system?

The brakes may squeak.
The brakes may not work.
The brakes may be sluggish.
The brakes will be very sensitive.

Q.10

When you are about to start down a hill, you should switch into a ____ gear.

Higher
Faster
Lower

Q.11

Brakes can get out of adjustment:

If they are hot.
During the winter.
If they are used at all.
If brakes on one side are used more often than brakes on the other side.

Q.12

In a dual air brake system, if one air system is very low on pressure:

None of the brakes will work at all.
Either the front or rear brakes will not be fully operable.
There is usually no noticeable effect.

Q.13

If an air compressor is belt-driven, the belt should be routinely checked to ensure that it is:

Thin.
Properly tightened.
Cracked.

Q.14

To use the stab braking method in an emergency situation, you should:

Apply the brakes completely until the wheels lock up, release the brakes until the wheels start rolling, then repeat the process.
Apply the brakes about halfway, but keep the wheels rolling.
Fully apply the brakes, let the wheels lock up, and hold the brake pedal down, keeping the wheels locked until the vehicle stops.
Apply the emergency brake.

Q.15

The application pressure gauge:

Shows how much air pressure is being applied to the brakes.
Shows the temperature of air being used in the braking system.
Shows the pressure of the air coming from the compressor.
Shows the number of times the brakes have been used.

Q.16

If the spring brakes are on, you should:

Not use the brake pedal.
Press the accelerator.
Move the steering wheel.
Be especially careful because the brakes may fail.

Q.17

If using air tanks with manually operated drains, how often should you drain the tanks?

Every day
Once a week
Once a month
Once every 3,000 miles

Q.18

On flat surfaces, wheel chocks:

Can be used to prevent a parked vehicle from moving.
Make it easier for a parked vehicle to roll.
Should only be used on the front driver's side tire.

Q.19

Front brake limiting valves were intended to:

Prevent the front tires from skidding.
Prevent the front tires from overheating.
Create equal brake usage.
Remove uncertainty when applying the brakes.

Q.20

Air tank drains:

Allow rain water to enter the tanks.
Are used to drain water and oil from the air tanks.
Should never be opened.
Must remain open while driving.

Q.21

If the low air pressure warning signal comes on, you should:

Continue driving, but have the brakes repaired within a week.
Pull over and inspect the brakes.
Phone a mechanic while driving.

Q.22

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.23

Truck tractors with air brakes built on or after March 1, 1997 must have:

An Anti-Lock Braking System (ABS).
Bluetooth.
GPS.
A rear back-up camera.

Q.24

In a dual air brake system:

Each system has separate air tanks, hoses, and lines.
The systems share air tanks, but each has its own separate hoses and lines.
Each system uses the same lines and hoses.
One system is the main braking system and a second system is ready to be used if the first one fails.

Q.25

Using an Anti-Lock Braking System (ABS):

Is required in some states.
Shortens brake response time.
Provides additional control.

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