AIR BRAKES PRACTICE TEST - INDIANA
6.
When you make a quick lane change, the crack-the-whip effect can:
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the trailer to swing wide to the left.
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turn the trailer over.
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make it harder to turn without skidding.
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improve your traction.
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7.
When parking a trailer without spring brakes, it is very important for safety that you use wheel chocks. Why?
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You may not notice a major leak in the service line until you try to put the brakes on.
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if you don't use wheel chocks, supply air will be sent to the service line instead of going to charge the trailer air tanks.
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The air could leak out of the trailer air tank, releasing its emergency brakes.
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None of the above.
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8.
How should you apply the brakes when going down a steep downgrade?
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Apply the brakes when you reach the bottom of the downgrade.
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You should not brake, and only use engine braking to prevent brake failure.
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Apply the brakes whenever you reach your safe speed, until your speed has been reduced to 5 mph below your safe speed.
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Apply the brakes as hard as you can without locking the wheels.
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9.
What should you do to correct a drive-wheel braking skid?
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Turn in the same direction as the skid.
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Fully apply the brakes, turn the steering wheel quickly, push in the clutch, and countersteer.
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Stop braking, turn the steering wheel quickly, push in the clutch, and countersteer.
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None of the above.
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10.
The use of air brakes on a steep downgrade is only a supplement to:
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the braking effect of the engine.
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the use of the spring brakes.
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the use of the parking brakes.
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the use of the "controlled braking" method.
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