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Rhode Island
Rhode Island CDL Air Brakes 2
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Q.1
Submit
What is often found in compressed air?
Water
Cardboard
Brake fluid
Q.2
Submit
If an air compressor is belt-driven, the belt should be routinely checked to ensure that it is:
Thin.
Properly tightened.
Cracked.
Q.3
Submit
Braking mechanisms are located inside:
The fifth wheel.
A brake drum.
The landing gear.
Q.4
Submit
The ____ are activated by an electric switch that is triggered by the brake pedal.
Headlights
Turn signals
Brake lights
Q.5
Submit
During an applied leakage test, the maximum leakage rate for a triple combination vehicle is ____ in a minute.
2 psi
4 psi
6 psi
Q.6
Submit
If using spring brakes when hauling a heavy load, a complete stop will:
Be impossible.
Take a long time.
Take a short amount of time.
Q.7
Submit
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.8
Submit
A safety valve is set to open at ____ pounds per square inch (psi).
100
150
200
Q.9
Submit
Do not operate a vehicle if any brake drums have cracks that are larger than ____ of the width of the friction area.
One half
One third
One fifth
Q.10
Submit
The ____ between an air compressor and reservoir tank prevents air from escaping if the air compressor has a leak.
Slack adjuster
One-way check valve
Tractor protection valve
Q.11
Submit
In a dual air brake system, air pressure should build from 85 to 100 psi within ____ seconds.
25
10
45
Q.12
Submit
Having ABS on only one axle:
Can be dangerous.
Still allows you additional control when braking.
Slows the vehicle, but cannot stop it.
Q.13
Submit
A wig wag is:
A low pressure warning device.
A tube that carries air to the brakes.
A type of air brake system.
Q.14
Submit
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.15
Submit
During an applied leakage test, the maximum leakage rate for a double combination vehicle is ____ in a minute.
2 psi
4 psi
6 psi
Q.16
Submit
What do the two systems of a dual air brake system share?
Hoses
An air compressor
Air tanks
Q.17
Submit
A low air pressure warning signal should activate:
When tank pressure falls below 120 psi.
When tank pressure falls below 60 psi.
When tank pressure falls below 10 psi.
Q.18
Submit
When stopping in an emergency situation, you should:
Veer your trailer to the right and stop.
Stop in a straight line.
Veer your trailer to the left and stop.
Q.19
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.
Q.20
Submit
When experiencing cold weather, be sure to check your vehicle's alcohol evaporator:
Every three hours.
Every day.
Every other week.
Q.21
Submit
What color light indicates a vehicle's ABS is not working?
Green
Blue
Yellow
Q.22
Submit
When the spring brakes are on, you should never:
Turn on the lights.
Turn off the vehicle.
Push down the brake pedal.
Q.23
Submit
During a static leakage test, what is the maximum leakage rate that is safe for a double combination vehicle?
3 psi in one minute.
6 psi in one minute.
8 psi in one minute.
Q.24
Submit
In a vehicle with dual air brakes, a leak in one system ____ the second system.
Will always affect
May not affect
Is caused by
Q.25
Submit
Why should you regularly drain the air tanks?
Because the air gets old and needs to be replaced
Because compressed air contains some water and the water collects in the tanks
To allow for a change in pressure
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