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North Dakota CDL Air Brakes Test 2
Practice mode
Question
1
of 23
QUESTION 1 / 23
What can happen if parking brakes are used in very wet weather with temperatures below freezing?
Choose one answer below.
A
The brakes will squeak.
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B
The brakes may freeze so the vehicle cannot move.
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C
The brakes may suddenly release by themselves.
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D
The brakes may become too smooth to be used.
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QUESTION 2 / 23
How many air storage tanks are used in an air brake system?
Choose one answer below.
A
Two tanks
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B
Four tanks
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C
Six tanks
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D
The number varies.
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QUESTION 3 / 23
Air tank drains:
Choose one answer below.
A
Allow rain water to enter air tanks.
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B
Are used to drain water and oil from air tanks.
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C
Should never be opened.
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D
Must remain open while driving.
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QUESTION 4 / 23
In a dual air brake system, a leak in one system:
Choose one answer below.
A
Always means there are leaks in both systems.
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B
May not affect the other system.
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C
Is not something to worry about.
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D
Will also affect the other system.
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QUESTION 5 / 23
Brake fading is caused when:
Choose one answer below.
A
Brakes are not used often enough.
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B
Brakes overheat.
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C
Brakes are too cold.
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D
Brakes are wet.
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QUESTION 6 / 23
When you press the brake pedal in a vehicle with S-cam brakes, air pressure pushes out the rod and moves the:
Choose one answer below.
A
Slack adjuster.
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B
Axle.
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C
Brake drum.
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D
Alcohol evaporator.
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QUESTION 7 / 23
The ____ tells a driver how much pressure is in the air tanks.
Choose one answer below.
A
Application pressure gauge
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B
Air compressor governor
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C
Supply pressure gauge
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D
Drum brake
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QUESTION 8 / 23
How is the parking brake released?
Choose one answer below.
A
By tapping on the brake pedal three times
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B
By pushing in the brake control knob
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C
By engaging the accelerator
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D
By tapping the accelerator twice
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QUESTION 9 / 23
Most heavy-duty vehicles use ____ air brake systems.
Choose one answer below.
A
Single
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B
Dual
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C
Triple
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D
Quad
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QUESTION 10 / 23
If the brake pads rub against the brake drums and create too much heat:
Choose one answer below.
A
The brakes will stick.
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B
The brakes will become extra sensitive.
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C
The brakes may stop working.
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D
The air compressor will kick on to cool the brakes.
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QUESTION 11 / 23
What color are ABS malfunction lamps?
Choose one answer below.
A
Orange
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B
Yellow
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C
Green
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D
Blue
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QUESTION 12 / 23
Air brakes are:
Choose one answer below.
A
An effective tool for stopping large vehicles.
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B
Prohibited on large vehicles.
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C
Only effective in poor weather.
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D
A tool to improve fuel efficiency.
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QUESTION 13 / 23
An Anti-Lock Braking System (ABS):
Choose one answer below.
A
Cannot be used with air brakes.
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B
Should be used on dry pavement.
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C
Can assist in maintaining control when braking.
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D
Should only be used if all axles have ABS.
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QUESTION 14 / 23
To make a stop in a vehicle using air brakes, the driver should:
Choose one answer below.
A
Press down the brake pedal.
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B
Lift the brake pedal toward them.
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C
Push in the brake knob.
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D
Pull out the brake knob.
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QUESTION 15 / 23
A vehicle equipped with an Anti-Lock Braking System (ABS) uses a ____ light to warn that the system is not working properly.
Choose one answer below.
A
Green
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B
Yellow
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C
Orange
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D
White
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QUESTION 16 / 23
The most common type of foundation brake used is the:
Choose one answer below.
A
S-cam drum brake.
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B
C-cam drum brake.
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C
G-cam disc brake.
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D
P-cam disc brake.
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QUESTION 17 / 23
If a vehicle has air brakes, the air compressor drive belt should be checked before each drive. In what condition should the belt be?
Choose one answer below.
A
Loose
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B
Tight
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C
Cracked
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D
Bumpy
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QUESTION 18 / 23
Truck tractors with air brakes that were built on or after March 1, 1997 are equipped with:
Choose one answer below.
A
An extra set of brakes.
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B
Voice-activated brakes.
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C
Cruise control.
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D
Anti-Lock Braking Systems (ABS).
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QUESTION 19 / 23
Vehicles with dual air brake systems:
Choose one answer below.
A
Have air pressure in the braking system even when the vehicle is not running.
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B
Maintain some air pressure in the braking system when the vehicle is not running.
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C
Must be run to build air pressure to allow the brakes to operate properly.
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D
Maintain air pressure when shut off for periods of less than four hours.
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QUESTION 20 / 23
In a vehicle with dual air brakes, what happens if one system is low on pressure?
Choose one answer below.
A
The air from the other system will be used to supplement the system with the low pressure.
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B
The front or rear brakes may not work properly.
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C
All brakes will be inoperable.
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D
The low system will use an auxiliary system to fill the tank.
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QUESTION 21 / 23
A tank endorsement is:
Choose one answer below.
A
Only required when transporting gases.
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B
Only required when transporting liquids.
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C
Required when transporting both liquids and gases.
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D
Optional when transporting hazardous materials.
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QUESTION 22 / 23
Braking mechanisms are located ____ a brake drum.
Choose one answer below.
A
Outside
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B
Inside
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C
Next to
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D
On top of
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QUESTION 23 / 23
If the spring brakes are activated, you should never:
Choose one answer below.
A
Push down the brake pedal.
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B
Open the hood.
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C
Release air from the air storage tanks.
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D
Open the door to the cab.
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