INDIANA CDL AIR BRAKES PRACTICE TEST
11.
Which of the following is NOT correct? An ABS system:
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is a safety anti-skid braking system.
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reduces the braking pressure to a safe level.
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helps you stop faster.
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helps you avoid wheel lock up.
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12.
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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3 seconds
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5 seconds
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2 seconds
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4 seconds
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13.
You are driving a vehicle with air brakes when the low air pressure warning light and buzzer come on. You should:
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activate your hazard lights and drive to the nearest place where you can stop.
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apply the brakes as hard as you can.
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slow down and test your brakes.
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pull off the road and stop immediately.
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14.
In a dual-air system - with engine at operating RPM, the pressure should build from 85 to 100 psi within how many seconds?
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12
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60
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45
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20
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15.
The application pressure gauge shows:
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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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how much air pressure you are applying to the brakes.
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All of the above.
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