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19 Cards in this Set
- Front
- Back
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1. Why must air tanks be drained? |
To drain moisture and oil out of the tank.
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2. What is a supply pressure gauge used for? |
To tell you how much air is in the air tanks.
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3. All vehicles with air brakes must have a low air pressure warning signal. True or False?
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True.
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4. What are spring brakes?
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If the airbrakes leak down, springs press the brakes on to stop the vehicle.
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5. Front wheel brakes are good under all conditions. True or False?
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True.
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6. How do you know if your vehicle is equipped with anti lock brakes?
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The vehicle will have a yellow ABC malfunction lamp.
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1. What is a dual air brake system?
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A two brake system, one operates the front brakes and one operates the back brakes.
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2. What are the slack adjusters?
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It is an adjusting nut on the backside of the brake drum used for adjusting the brakes.
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3. How can you check slack adjusters?
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Park on level ground, turn off parking brakes, pull hard on each slack adjuster. It shouldn't move more than one inch.
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4. How can you test the low pressure warning signal?
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Shut off the engine with enough air pressure, turn on the electrical power and step on and off the brake pedal until the low air pressure warning signal comes on.
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5. How can you check that the spring brakes come on automatically?
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Shut off the engine with enough air pressure, turn on the electrical power and step on and off the brake pedal until the low air pressure warning signal comes on.
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6. What are the maximum leakage rates?
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Less than two psi in one minute for single vehicles and less than three psi in one minute for combination vehicles.
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1. Why should you be in the proper gear before starting down a hill?
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Brakes can fade or fail from excessive heat caused by using them too much and not relying on the engine braking effect.
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2. What factors can cause brakes to fade or fail?
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Over heating, low air pressure, and not relying on the engine braking effect. Excessive heat is the number one enemy of brakes. There are a number of factors that can lead to your brakes overheating, including improper braking techniques and improper brake adjustment.
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3. The use of brakes on a long, steep downgrade is only a supplement to the braking effect of the engine. True or False?
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True.
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4. If you are away from your vehicle only a short time, you do not need to use the parking brake. True or False?
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False.
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5. How often should you drain air tanks?
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Daily.
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6. How do you brake when you drive a tractor trailer combination with ABS?
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Use only the braking force necessary to stop safely and stay in control.
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7. You still have normal brake functions if your ABS is not working. True or False?
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True |
