AIR BRAKES CDL PRACTICE TEST - DELAWARE
16.
Your vehicle has a dual air brake system. If one air system is very low on pressure, you should:
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reduce your speed and drive to the nearest garage for repairs.
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call your dispatcher or supervisor for instructions.
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bring the vehicle to a safe stop, and have the air brakes system fixed.
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reduce your speed and check the low air pressure warning signal for the other system regularly.
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17.
Supply pressure gauges tell drivers:
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how much air pressure they 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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how much pressure is in the air tanks.
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All of the above.
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18.
A dual air brake system:
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has a single air brake system, which uses two separate sets of brake controls.
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has a single air brake system, which uses a single set of brake controls.
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has two separate air brake systems, which use a single set of brake controls.
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has two separate air brake systems, which use two separate sets of brake controls.
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19.
To check that spring brakes come on automatically, the first thing to do is to:
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continue to step on and off the brake pedal until the air pressure falls to the manufacturer’s specification.
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turn off the engine, release the parking brake and time the air pressure drop.
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release the parking brake, move the vehicle forward slowly, and apply the brakes firmly.
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All of the above.
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20.
Rough acceleration:
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improves gas mileage.
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is recommended during long trips.
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is necessary to warm up the engine.
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can cause mechanical damage.
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