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1.
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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1/2
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1/4
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9/10
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3/5
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2.
Vehicles with air brakes require more stopping distance than vehicles with hydraulic brakes. Why?
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Air brakes use different brake drums.
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When driving vehicles with air brakes, the average perception distance increases from 400 feet to 2200 feet.
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It takes one half second or more for the air to flow through the lines to the brakes.
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Stopping distance for vehicles with air brakes is made up of six different factors.
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3.
Empty trucks have the best braking. True or False?
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False.
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True.
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It depends on the truck.
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It depends on the cargo.
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4.
If you must stop on a one-way or divided highway, you should place warning devices _______ toward the approaching traffic.
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5, 25 and 50 feet
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10, 100 and 200 feet
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5, 50 and 500 feet
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3, 15 and 45 feet
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5.
Air tanks usually hold enough compressed air to allow the brakes to be used _________ even if the compressor stops working.
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for 3 days
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for one day
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several times
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for one stop
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6.
If your trucks has a high center of gravity, which of the following is true for curves?
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You should slow down, as your truck can roll over at the posted speed limit for the curve.
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You should travel at the posted speed limit.
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Reduce your speed to a crawl.
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None of the above.
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7.
If your brakes fail while you are driving on a downgrade, you should:
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use an escape ramp if it's available.
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immediately start looking outside your vehicle for something to stop it.
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take the least hazardous escape route you can.
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All of the above.
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8.
You should drain the air tanks completely. If water and oil collect in the air tanks:
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your brakes could become hard to press.
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your brakes could fail.
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your brakes could heat up.
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None of the above.
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9.
If the low pressure warning signal doesn't work:
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you could lose air pressure and you would know it.
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in dual systems the stopping distance will be decreased.
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this could cause sudden emergency braking in a single-circuit air system.
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None of the above.
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10.
In vehicles with air brakes, the brake pedal:
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let the
air out of the spring brakes.
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controls the air pressure applied to the brakes.
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tells you how much pressure is in
the air tanks.
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pumps air into the air storage
tanks.
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