DE CDL AIR BRAKES PRACTICE TEST
16.
A low air pressure warning signal:
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is required on vehicles with air brakes.
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is optional on vehicles with air brakes.
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is required on all vehicles without air brakes.
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None of the above.
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17.
Which of the following is not a way to know when to change gears?
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Use engine speed (rpm)
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Check that the pressure gauge shows normal oil pressure
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Use road speed (mph)
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Watch your tachometer
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18.
If your truck catches fire, the first thing you should do is to:
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pull into a service station and call for help.
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pull off the road and park in an open area.
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get the vehicle off the road and park near other vehicles.
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get off the vehicle, open the hood and start shooting foam to keep the engine cool.
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19.
You must take the CDL skills tests in the type of vehicle for which you wish to be licensed. If your test vehicle does not have air brakes:
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you will be restricted to driving vehicles without air brakes.
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you'll have to immediately retake your test using another vehicle.
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you won't receive a CDL.
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you'll need to take another knowledge test about air brakes.
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20.
Vehicles with air brakes require more stopping distance than vehicles with hydraulic brakes. Why?
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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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Air brakes use different brake drums.
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Stopping distance for vehicles with air brakes is made up of six different factors.
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