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UPGRADE TO CDL PREMIUM
1.
If a load is placed on one side of the trailer:
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a rollover is more likely.
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the steering axle weight will be too light to steer safely.
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making turns may be easier.
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2.
A low air pressure warning signal:
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is required on all vehicles without air brakes.
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is optional on vehicles with air brakes.
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is required on vehicles with air brakes.
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3.
In vehicles with air brakes, the air compressor governor:
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controls how much air the air compressor will pump into the air storage tanks.
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controls when the air compressor will pump air into the air storage tanks.
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controls when the air storage tanks will pump air into the air compressor.
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4.
When driving in a construction zone, if a construction worker is near the road, you should:
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further reduce your speed.
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come to a complete stop.
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maintain a constant speed.
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5.
If air doesn't flow all the way to the back:
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a rollover is more likely.
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your brakes will not work properly.
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the trailer will tend to swing around.
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6.
Which of the following is a reason why air tanks must be drained?
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Your brakes may fail due to the water freezing.
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Your battery fluid may drain out.
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The governor may stop the compressor from pumping air.
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7.
Before driving a vehicle with a dual air brake system, you should allow time for the air compressor to build up a minimum of ____ pressure in both the primary and secondary systems.
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150 psi
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50 psi
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100 psi
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8.
Pressing and releasing the brake pedal unnecessarily can:
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causes friction, which slows the vehicle.
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let air out faster than the compressor can replace it.
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apply more air pressure.
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9.
The air compressor is connected to:
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the radiator.
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the engine.
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the transmission.
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10.
If your vehicle is hydroplaning, you should:
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release the accelerator and push in the clutch.
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use the brakes to slow down.
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accelerate to get through the water as quickly as possible.
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