CDL AIR BRAKES PRACTICE TEST - CALIFORNIA
21.
Air brakes are 3 different braking systems: service brake, parking brake, and _______ brake.
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emergency
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S-cam
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foot
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22.
When you apply the brakes, the brake shoes and linings are pushed against:
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the supply pressure gauge.
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the S-cam.
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None of the above.
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23.
The safety valve is usually set to open at:
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150 psi.
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200 psi.
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100 psi.
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24.
Dual tires:
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should always come in contact with each other.
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should come in contact with each other whenever possible.
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should not come in contact with each other.
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25.
Which of the following is not a way to know when to change gears?
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Use engine speed (rpm)
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Use road speed (mph)
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Check that the pressure gauge shows normal oil pressure
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