TN CDL COMBINATION PRACTICE TEST
11.
Never
drive with landing gear only part way up. Why?
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It makes it harder to brake.
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It may catch on railroad tracks.
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It may be harder to use.
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It must be exactly 5 feet off the ground.
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12.
ABS helps you:
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increase your normal braking capability.
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steer gently and smoothly while you are braking.
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stop much faster.
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avoid wheel lock up and maintain control of your vehicle when you brake.
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13.
A steering wheel should have no more than _____ of play. If there is more play than this, it may be hard to steer.
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15 degrees
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It doesn't matter.
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30 degrees
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10 degrees
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14.
Which of the following is NOT part of testing the tractor protection valve?
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Charging the trailer air brake system.
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Shutting off the engine.
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Stepping on and off the brake pedal several times to reduce the air pressure in the tanks.
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Pulling forward slowly, then applying the trailer brakes.
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15.
What is a tractor jackknife?
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When the rear wheels of a trailer lock up, and the tractor swings around.
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When the wheels of a trailer lock up, and the trailer swings around.
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When a drive-wheel skid lets the trailer push the towing vehicle sideways.
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None of the above.
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16.
If you feel drowsy while driving, what should you do?
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Turn on the radio to keep you awake.
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Get an energy drink.
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Eat heavy foods.
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Pull off the road and get some sleep.
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17.
Overloading a vehicle with cargo can have negative effects on all of the following except:
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Speed control
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Weight limits
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Steering
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Braking
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18.
When you inspect the coupling, make sure there is ______ between the upper and lower fifth wheel.
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enough space
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about 1/2 inch
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about 1 inch
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no space
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19.
Which of the following is NOT a step in backing up with a trailer?
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Backing slowly
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Checking the outside mirrors on both sides frequently
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Backing quickly when the path is straight
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Looking at your line of travel before you begin
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20.
After a tire has been changed, you should:
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deflate the tire to 15 psi.
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wait at least 30 minutes before driving.
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decrease tire pressure.
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stop a short while later and check that the nuts are tight.
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