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WorksheetsAir Brakes quiz 2
Total questions: 26
Worksheet time: 21mins
What part of the truck is the air compressor connected to?
Engine
Transmission
Radiator
Having ABS on only one axle:
Still allows you additional control when braking.
Slows the vehicle but cannot stop it.
Can be dangerous.
If the vehicle has air brakes, the air compressor drive belt should be checked before each drive. In what condition should the belt be in?
Tight.
Loose.
Cracked.
What kind of force must emergency brakes use?
Electrical.
Heavy.
Mechanical.
Air pressure.
When going down a steep downgrade,
The air brakes should be used.
The vehicle should be continually downshifted instead of using the brakes.
A dual air brake system:
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.
Consists of two separate air brake systems that share a single set of controls.
What does an application pressure gauge do?
Shows how much air pressure is available.
Shows how much air pressure you are applying to the brakes.
Shows how much air pressure would be required to stop the vehicle.
At what psi is the safety valve set to open?
500 psi
150 psi
100 psi
200 psi
If using the spring brakes when hauling a heavy load, a complete stop will:
Be impossible.
Take a short amount of time.
Take a long time.
Before driving a vehicle with a dual brake system, the driver should:
Begin driving just after the vehicle starts.
Let the vehicle warm up to ensure the fuel reaches the engine.
What should happen if the air pressure in the air brake system tanks falls below 55 psi?
The vehicle will not shift out of gear.
The warning light will come on.
The front lights will flash.
Using the brakes creates heat. What happens if there is too much heat produced?
The brakes may not work.
The brakes may squeak more than usual.
The brakes will likely brake unevenly.
In a dual 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 operating fully.
There is usually no noticeable effect.
Why do you need to drain the air tank regularly?
Because compressed air contains some water, and the water collects in the tanks.
Because the air gets old and needs to be replaced.
To allow for a change in pressure.
When the spring brakes are on, you should never:
What do ABS brakes do?
Locks up the wheels.
Help you avoid wheel lock up.
Prevents the vehicle from accelerating when going uphill.
What are the two markings on a front brake limiting valve?
Low and high.
Normal and slippery.
Left and right.
On a truck with air brakes, what does the braking system’s air compressor do?
It pumps it into the air storage tanks.
It moves air to the back of the truck.
It fills the tires.
Air pressure should build up in a single air system, within how long?
12 minutes
3 minutes
15 minutes
What is brake lag?
The air storage tanks:
Hold enough air for the brakes to be used several times if the compressor stops working.
Do not hold air unless there is an emergency.
Hold only enough air for one braking cycle.
Brakes can get out of adjustment:
If the air brakes on one side are used more often than the brakes on the other side.
During the winter.
If they are hot.
If they are used at all.
Truck tractors with air brakes built after March 1, 1997 must have:
Antilock Braking System
Bluetooth
GPS
Which of the following items is not part of a vehicle’s air brake system?
Air filter
Low pressure warning device
Air gauges
If the spring brakes are on, you should:
True or False: Front Brake Chambers have parking brake capabilities.
True
False
