OKLAHOMA CDL AIR BRAKES PRACTICE TEST
6.
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 parking brakes.
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the use of the spring brakes.
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7.
Which of the following is not a braking system on a truck?
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Steering brake
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Parking brake
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Service brake
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8.
Why should you check your mirrors regularly to know where other vehicles are around you?
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To move out of their way if they want to get past.
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To know whether you can make a quick lane change in an emergency.
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To flash the brake lights if you are being tailgated.
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9.
Having ABS on only the trailer:
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still gives you more control over your vehicle during braking.
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makes the trailer more likely to swing out.
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is very dangerous.
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10.
To make the brakes work, air brakes use:
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nitrogen.
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compressed air.
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hydraulic air.
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