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UPGRADE TO CDL PREMIUM
1.
If air doesn't flow all the way to the back:
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the trailer will tend to swing around.
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your brakes will not work properly.
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a rollover is more likely.
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2.
The best way to know what's going on behind and to the sides of your vehicle is to:
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check your mirrors regularly.
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use the rear view camera.
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lean out of the window.
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3.
Air brakes use ________ to make the brakes work.
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compressed gas cylinders
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compressed air
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compressed gases
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4.
To perform an applied leakage test, the vehicle’s air pressure should be built up to maximum pressure. Check the air gauge to see that the air pressure should drop no more than:
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3 psi for single vehicles and 4 psi for a combination of 2 vehicles.
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1 psi for single vehicles and 3 psi for a combination of 2 vehicles.
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2 psi for single vehicles and 5 psi for a combination of 2 vehicles.
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5.
Controlled braking:
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involves locking the wheels and then releasing the brakes.
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can be used to keep your vehicle in a straight line and allow you to turn if necessary.
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must be used when you need to turn sharply while braking.
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6.
Rough acceleration:
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can cause mechanical damage.
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is necessary to warm up the engine.
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improves gas mileage.
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7.
Excessive use of the service brakes results in overheating and leads to:
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brake fade.
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poor traction.
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reduction of the brake drums.
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8.
The air storage tanks:
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are used to hold compressed air.
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are connected to the engine through gears or a v-belt.
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stop the compressor from pumping air.
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9.
Empty trucks:
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require greater stopping distances.
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are higher than loaded trucks.
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All of the above.
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10.
How can you tell if your vehicle is equipped with ABS?
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Look for yellow ABS malfunction lamps on the instrument panel.
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Trailers will have yellow ABS malfunction lamps on the left side.
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All of the above.
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