DC CDL AIR BRAKES PRACTICE TEST
16.
It may not be safe to operate at legal maximum weights:
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in hot weather.
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on two-way streets.
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on highways.
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during bad weather or in mountains.
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17.
Emergency brakes must be held on by:
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hydraulic pressure.
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air pressure.
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mechanical force.
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dynamic pressure.
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18.
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 inside of
the brake drum.
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the s-cam.
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19.
The safety valve is usually set to open at:
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150 psi
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125 psi
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200 psi
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100 psi
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20.
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 won't receive a CDL.
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you'll need to take another knowledge test about air brakes.
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you will be restricted to driving vehicles without air brakes.
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