MD CDL AIR BRAKES PRACTICE TEST
21.
Hydroplaning is more likely if:
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tire pressure is low.
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the road is wet.
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tire tread is worn.
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All of the above.
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22.
When going down grades, you should:
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rely solely on engine braking to reduce your speed.
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downshift to a lower gear.
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shift up.
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put the transmission in Neutral.
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23.
The total stopping distance for vehicles with air brake systems is made up of __ different factors.
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4
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2
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3
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5
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24.
Supply pressure gauges tell you:
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how much pressure is in the air tanks.
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when the pressure in the system drops below 60 psi.
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when the air pressure in the tanks falls below 60 psi.
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how much air pressure you are applying to the brakes.
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25.
If a load is placed on one side of the trailer:
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making turns may be easier.
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the steering axle weight will be too light to steer safely.
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a rollover is more likely.
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your brakes won't work.
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