MD CDL AIR BRAKES PRACTICE TEST
16.
One way to prevent hydroplaning is to:
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have less than 4/32 inch tread depth in every major groove on front tires.
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use the controlled braking method.
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take curves at higher speeds.
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make sure you have enough tread on your tires.
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17.
A dual air brake system:
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has a single air brake system, which uses a single set of brake controls.
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has two separate air brake systems, which use two separate sets of brake controls.
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has a single air brake system, which uses two separate sets of brake controls.
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has two separate air brake systems, which use a single set of brake controls.
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18.
The application pressure gauge shows:
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how much pressure the relay valves should send to the trailer brakes.
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how much pressure is in the air tanks.
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how much air pressure you are applying to the brakes.
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All of the above.
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19.
If your trucks has a high center of gravity, which of the following is true for curves?
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You should travel at the posted speed limit.
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You should slow down, as your truck can roll over at the posted speed limit for the curve.
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Reduce your speed to a crawl.
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None of the above.
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20.
The best way to know what's going on behind and to the sides of your vehicle is to:
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lean out of the window.
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use the rear view camera.
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check your mirrors regularly.
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ask your passenger(s).
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