IN CDL Air Brakes Practice Test
16.
If you must stop on a one-way or divided highway, place your warning devices:
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10 feet, 100 feet, and 200 feet toward the approaching traffic.
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100 feet, 200 feet, and 300 feet toward the approaching traffic.
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50 feet, 100 feet, and 150 feet toward the approaching traffic.
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10 feet, 50 feet, and 150 feet toward the approaching traffic.
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17.
If air doesn't flow all the way to the back:
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your brakes will not work properly.
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the trailer will tend to swing around.
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a rollover is more likely.
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your lower fifth wheel may fall off.
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18.
Which of the following is NOT a way to determine if your trailer is equipped with ABS (antilock braking system)?
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It was built after March 1, 1998.
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The letters "ABS" are printed on the side of the steering wheel.
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Wheel speed sensor wires are coming from the back of the brakes.
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It has yellow ABS malfunction lamps.
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19.
If the air pressure gets too low:
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the brakes will lock up.
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you should set the parking brake.
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ABS will help maintain vehicle control.
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the brakes will not work.
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20.
With the air pressure built up to governor cutoff, the maximum leakage rates per minute after the initial pressure drop are:
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3 psi for single vehicles and 4 psi for a combination of 2 vehicles.
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5 psi for single vehicles and 6 psi for a combination of 2 vehicles.
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4 psi for single vehicles and 2 psi for a combination of 2 vehicles.
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1 psi for single vehicles and 2 psi for a combination of 2 vehicles.
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