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1.
In a vehicle with a dual air brake system:
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each system has its own air tanks.
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one system supplies air to the trailer.
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both systems typically operate the regular brakes on the rear axle.
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All of the above.
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2.
After supplying air to the trailer brake system, you should check the brake system for crossed air lines by:
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shutting the engine off so you can hear the brakes.
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checking the air brake system pressure gauge for signs of major air loss.
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applying and releasing the trailer brakes and listening for the sound of trailer brakes.
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All of the above.
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3.
The heavier the vehicle:
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the more work the brakes must do to stop it.
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the higher the center of gravity will be.
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the less work the brakes must do to stop it.
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None of the above.
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4.
With brake drums, if brakes become too hot:
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your ABS will malfunction.
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the air compressor will kick on to cool the brakes.
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the brakes will supply too much power to the drive wheels.
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the brakes may stop working.
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5.
The air compressor stops pumping air into the air storage tanks when air tank pressure rises to around:
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125 psi.
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450 psi.
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100 psi.
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250 psi.
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6.
If your ABS is not working:
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it will slow your truck to a halt and force you to pull over.
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the drive wheels will begin to spin, and you should take your foot off the accelerator.
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you still have normal brake functions, and should drive and brake as you always have.
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you should immediately bring your vehicle to a complete stop.
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7.
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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Your transmission fluid may drain out.
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8.
A low air pressure warning signal must come on when the air pressure in the tanks falls below:
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15 psi.
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10 psi.
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100 psi.
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60 psi.
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9.
When a tire fails, you must:
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hold the steering wheel firmly.
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get out and check all the tires after you have come to a stop.
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stay off the brake.
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All of the above.
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10.
The service brake applies and releases:
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the parking brake when you use the parking brake control.
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the brake when you use the brake pedal during normal driving.
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the brake in an emergency situation.
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None of the above.
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