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Driving Test
California
California CDL Air Brakes 1
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Q.1
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A driver can rely on front wheel braking to work:
On dry roadways only.
Under all conditions.
Under all conditions, except for snow.
Q.2
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When leaving your vehicle unattended:
The parking brake should be used.
The parking brake only needs to be used if the vehicle is parked on a slope.
The parking brake should not be used, as it can damage the tires.
Q.3
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Using the brakes creates heat. If too much heat is produced:
The brakes may not work.
The brakes may squeak more than usual.
The brakes will brake unevenly.
Q.4
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What do the two systems of a dual air brake system share?
Hoses
An air compressor
Air tanks
Q.5
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What do air brakes use to make the brakes work?
Compressed air
Outside air
Non-compressed air
Q.6
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What is removed when an air tank is drained?
Water and oil
Ammonia
Liquid cleaners
Q.7
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If the low air pressure warning signal comes on in a vehicle with air brakes, the driver should:
Test the brakes while driving, but continue driving if nothing seems wrong.
Immediately stop driving.
Drive with the hazard lights activated.
Q.8
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Air tank drains:
Should not be used in cold weather.
Are helpful to remove water and oil from the air tanks.
Are used to move air to the brakes.
Q.9
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Air pressure should build up in a single air system within:
15 minutes.
12 minutes.
Three minutes.
Q.10
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In a dual air brake system, a leak in one system:
Always means there are leaks in both systems.
May not affect the other system.
Is not something to worry about.
Q.11
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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.
Q.12
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An air compressor governor will stop the compressor from pumping air once the air tanks have an air pressure level of:
125 psi.
100 psi.
150 psi.
Q.13
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If the safety relief valve in the air brake system releases air:
The compressor needs more air.
The air pressure has become too high.
The brakes are fully operational.
Q.14
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The parking brake in a newer vehicle is applied by:
Moving a lever to the right.
Pushing a yellow, diamond-shaped knob.
Pulling a yellow, diamond-shaped knob.
Q.15
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If the safety relief valve in an air brake system is releasing air:
You should not be concerned as this is a normal process.
There is something wrong with the brakes.
The valve is operational.
Q.16
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During an applied leakage test, the maximum leakage rate for a single vehicle with air brakes is:
3 psi in one minute.
6 psi in one minute.
8 psi in one minute.
Q.17
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The ____ are activated by an electric switch that is triggered by the brake pedal.
Headlights
Turn signals
Brake lights
Q.18
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The air pressure in a dual air brake system should build from 85 to 100 psi within:
Two minutes.
15 seconds.
45 seconds.
Q.19
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You should ____ if the low pressure warning signal activates while you are driving.
Stop where you are and park
Exit the roadway as soon as safely possible
Continue driving normally
Q.20
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Braking mechanisms are located ____ a brake drum.
Outside
Inside
Next to
Q.21
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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.22
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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.
100 feet
250 feet
450 feet
Q.23
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When parked on a flat surface, you should:
Use wheel chocks to prevent your vehicle from moving.
Not use wheel chocks.
Use wheel chocks, but only if you have applied the parking brake.
Q.24
Submit
What is often found in compressed air?
Water
Cardboard
Brake fluid
Q.25
Submit
A dual air brake system:
Consists of two separate air brake systems that share a single set of controls.
Is a single air brake system with two different sets of controls.
Consists of one air brake system for the left side of the truck and one system for the right side of the truck, each with its own set of controls.
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