AIR BRAKES PRACTICE TEST - KENTUCKY
16.
How should you apply the brakes when going down a steep downgrade?
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Apply the brakes whenever you reach your safe speed, until your speed has been reduced to 5 mph below your safe speed.
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Apply the brakes as hard as you can without locking the wheels.
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You should not brake, and only use engine braking to prevent brake failure.
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Apply the brakes when you reach the bottom of the downgrade.
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17.
To prevent rollover, you should:
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keep the cargo as close to the ground as possible.
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drive slowly around on ramps and off ramps.
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go slowly around turns.
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All of the above.
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18.
The application pressure gauge shows:
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how much pressure is in the air tanks.
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how much air pressure you are applying to the brakes.
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how much pressure the relay valves should send to the trailer brakes.
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All of the above.
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19.
In some vehicles a modulating control valve may be used to:
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apply the front brakes.
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apply the parking brake.
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decrease the pressure in the brake system.
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apply the spring brakes gradually.
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20.
ABS malfunction lamps are located:
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on the instrument panel.
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under the hood.
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on the driver'door.
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None of the above.
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