AIR BRAKES CDL PRACTICE TEST - IOWA
6.
Stepping on and off the brake pedal several times:
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reduces the air pressure in the tanks.
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may cause air leaks.
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may result in dangerously thin linings.
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7.
Vehicles with air brake systems take longer to come to a complete stop than vehicles with hydraulic brakes because of:
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brake lag.
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brake fading.
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reaction distance.
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8.
Overloading a vehicle with cargo can have negative effects on all of the following except:
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Steering
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Braking
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Weight limits
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9.
What should you do to correct a drive-wheel braking skid?
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Fully apply the brakes, turn the steering wheel quickly, push in the clutch, and countersteer.
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Stop braking, turn the steering wheel quickly, push in the clutch, and countersteer.
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Turn in the same direction as the skid.
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10.
When you pull hard on a slack adjuster and it moves more than about _____ where the push rod attaches to it, the slack adjuster probably needs adjustment.
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1/2 inch
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2 inches
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1 inch
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