INDIANA CDL AIR BRAKES PRACTICE TEST
21.
To avoid becoming a distracted driver you should:
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not engage in complex conversations with others.
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not turn off all communication devices.
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adjust all vehicle controls and mirrors while driving.
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eat and drink while you drive.
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22.
Most heavy duty vehicles use ___ air brake systems for safety.
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single
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triple
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reduced
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dual
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23.
When coupling, you should:
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make sure the sliding fifth-wheel is locked.
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be aware that wrong coupling and uncoupling can be very dangerous.
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make sure the trailer wheels are not chocked.
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make sure the trailer kingpin is bent.
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24.
Excessive use of the service brakes results in overheating and leads to:
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reduction of the brake drums.
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low air pressure.
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poor traction.
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brake fade.
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25.
To make the brakes work, air brakes use:
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hydraulic air.
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compressed air.
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nitrogen.
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carbon monoxide.
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