COLORADO CDL AIR BRAKES PRACTICE TEST
11.
How can you tell if your vehicle is equipped with ABS?
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Look for yellow ABS malfunction lamps on the instrument panel.
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Look under the vehicle for the wheel speed sensor wires coming from the back of the brakes.
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Trailers will have yellow ABS malfunction lamps on the left side.
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All of the above.
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12.
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 is in the air tanks.
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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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13.
If you are driving a 30-foot vehicle at 55 mph, you should leave at least _____ between you and the vehicle ahead.
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5 seconds
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4 seconds
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2 seconds
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3 seconds
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14.
In combination vehicles with air brakes, the trailer air supply control should pop out when the air pressure falls within the range of:
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20 to 45 psi
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50 to 75 psi
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100 to 120 psi
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10 to 20 psi
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15.
The tire load rating is stated:
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on the side of each tire.
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on the dashboard.
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inside the suspension system.
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on each axle.
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