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DMV PRACTICE
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Georgia CDL Air Brakes Test 2
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Question
1
of 25
QUESTION 1 / 25
On trucks and buses, where are ABS malfunction lamps located?
Choose one answer below.
A
On the driver’s door
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B
On the instrument panel
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C
On the outside of the vehicle by the passenger’s door
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D
Under the hood
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QUESTION 2 / 25
Before driving a vehicle with a dual air brake system, you must wait for the air compressor to build a minimum of ____ in both the primary and secondary systems.
Choose one answer below.
A
25 psi
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B
50 psi
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C
75 psi
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D
100 psi
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QUESTION 3 / 25
An air compressor governor will stop the compressor from pumping air once the air tanks have an air pressure level of:
Choose one answer below.
A
125 psi.
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B
100 psi.
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C
150 psi.
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D
80 psi.
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QUESTION 4 / 25
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 5 / 25
All air tanks must include:
Choose one answer below.
A
A drain valve.
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B
A lock.
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C
A trap door.
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D
A warning sticker.
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QUESTION 6 / 25
Brakes may get out of adjustment:
Choose one answer below.
A
If they are too hot.
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B
In colder weather.
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C
If they are used.
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D
If they get wet.
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QUESTION 7 / 25
Spring brakes come on:
Choose one answer below.
A
When too much air pressure is lost.
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B
When a control on the dashboard is activated.
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C
When the tires have minimal tread depth.
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D
When the brakes are noisy.
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QUESTION 8 / 25
An air brake-equipped vehicle traveling at a speed of 55 mph under ideal driving conditions will need approximately ____ to come to a complete stop.
Choose one answer below.
A
100 feet
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B
250 feet
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C
300 feet
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D
450 feet
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QUESTION 9 / 25
During an applied leakage test, the maximum leakage rate for a single vehicle with air brakes is:
Choose one answer below.
A
3 psi in one minute.
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B
6 psi in one minute.
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C
8 psi in one minute.
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D
4 psi in one minute.
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QUESTION 10 / 25
Test the low pressure warning signal:
Choose one answer below.
A
Once a month.
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B
Once a week.
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C
Twice a week.
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D
Before every trip.
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QUESTION 11 / 25
Dollies equipped with ABS are required to have malfunction lamps located where?
Choose one answer below.
A
On the rear
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B
On the left side
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C
On the front
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D
On the top
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QUESTION 12 / 25
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 13 / 25
Air tank drains:
Choose one answer below.
A
Allow rain water to enter the tank.
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B
Are used to drain water and compressor oil from the air tank.
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C
Should never be opened.
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D
Must remain open during transit.
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QUESTION 14 / 25
If the low pressure warning signal activates while you are driving, you should:
Choose one answer below.
A
Continue driving normally.
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B
Exit the road and park as soon as safely possible.
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C
Stop where you are and park.
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D
Put on your hazard lights and continue driving.
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QUESTION 15 / 25
Which of the following is not a part of an air brake system?
Choose one answer below.
A
A service brake system
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B
A parking brake system
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C
An emergency brake system
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D
An axle brake system
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QUESTION 16 / 25
How is the parking brake released?
Choose one answer below.
A
By tapping the brake pedal three times
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B
By pushing in the brake control knob
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C
By starting the vehicle
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D
By tapping the accelerator twice
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QUESTION 17 / 25
When only the tractor is equipped with an Anti-Lock Braking System (ABS):
Choose one answer below.
A
There is a decreased risk of jackknifing.
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B
There is an increased risk of jackknifing.
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C
The brakes will not work as effectively as they would without ABS.
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D
The brakes will become more sensitive.
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QUESTION 18 / 25
The air compressor governor controls:
Choose one answer below.
A
When the air compressor pumps air into the air storage tanks.
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B
How fast air is pumped into the air storage tanks.
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C
The temperature of air pumped into the air storage tanks.
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D
The speed of the vehicle.
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QUESTION 19 / 25
Why do you need to drain air tanks regularly?
Choose one answer below.
A
Because the air gets old and needs to be replaced
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B
Because compressed air contains some water which must be drained from the tanks
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C
To allow for a change in air pressure
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D
To remove bad air from the tanks
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QUESTION 20 / 25
The parking brake should be:
Choose one answer below.
A
Used whenever you park your vehicle.
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B
Used while driving.
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C
Set when driving in bad weather.
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D
Removed.
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QUESTION 21 / 25
To use the stab braking method in an emergency situation, you should:
Choose one answer below.
A
Apply the brakes completely until the wheels lock up, release the brakes until the wheels start rolling, then repeat the process.
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B
Apply the brakes about halfway, but keep the wheels rolling.
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C
Fully apply the brakes, let the wheels lock up, and hold the brake pedal down, keeping the wheels locked until the vehicle stops.
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D
Apply the emergency brake.
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QUESTION 22 / 25
Some air brake systems use alcohol:
Choose one answer below.
A
To reduce the risk of ice forming in air brake valves.
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B
To make the compressor run more efficiently.
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C
To lubricate parts of the braking system.
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D
To reduce the risk of rust forming on air brake valves.
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QUESTION 23 / 25
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 24 / 25
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 25 / 25
Most heavy-duty vehicles use:
Choose one answer below.
A
Single air brake systems.
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B
Dual air brake systems.
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C
Triple air brake systems.
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D
Quadruple air brake systems.
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