AIR BRAKES CDL PRACTICE TEST - MINNESOTA
6.
Service brakes should:
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only be checked by a mechanic.
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always be checked before applying the brakes.
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be checked before each trip.
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All of the above.
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7.
It is not safe to drive a vehicle that has brake drums with cracks that are longer than ___ the width of the friction area.
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3/5
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1/2
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9/10
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1/4
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8.
With the air pressure built up to governor cutoff, the maximum leakage rates per minute are ___ psi for single vehicles and ___ psi for a combination of 2 vehicles.
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4; 5
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3; 4
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3; 2
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5; 6
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9.
In vehicles with air brakes, the two markings on a front brake limiting valve are:
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left and right.
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normal and slippery.
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wet and dry.
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high and low.
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10.
Why should you check your mirrors regularly to know where other vehicles are around you?
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To better assess your own speed.
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To move out of their way if they want to get past.
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To know whether you can make a quick lane change in an emergency.
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To flash the brake lights if you are being tailgated.
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