MT CDL AIR BRAKES PRACTICE TEST
21.
Which of the following is not a way to know when to change gears?
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Check that the pressure gauge shows normal oil pressure
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Use road speed (mph)
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Use engine speed (rpm)
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Watch your tachometer
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22.
You must take the CDL skills tests in the type of vehicle for which you wish to be licensed. If your test vehicle does not have air brakes:
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you'll have to immediately retake your test using another vehicle.
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you'll need to take another knowledge test about air brakes.
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you won't receive a CDL.
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you will be restricted to driving vehicles without air brakes.
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23.
The parking or emergency brakes of trucks or buses must be held on by:
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hydraulic pressure.
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fluid pressure.
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spring pressure.
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air pressure.
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24.
Before starting down a hill, you should slow down and shift down:
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to a gear that will cause your engine to exceed its redline.
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so you can coast downhill.
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to a gear that will cause your brakes to overheat.
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to a speed that you can control without using the brakes hard.
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25.
When you apply the brakes, the brake shoes and linings are pushed against:
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slack adjusters.
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the air compressor.
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the s-cam.
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the inside of
the brake drum.
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