COMBINATION PRACTICE TEST - OH CDL
11.
What is the proper following distance for a 40 foot truck traveling at 35 mph?
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12 seconds
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4 seconds
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10 seconds
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12.
Before connecting the converter dolly to the rear trailer, make sure that:
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the kingpin rests on the fifth-wheel.
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the trailer height is slightly lower than the center of the fifth-wheel.
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the shut-off valves at the rear of the first trailer are open.
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13.
The only way to stop a front-wheel skid is to:
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let the vehicle slow down.
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countersteer.
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supply more power to the drive wheels.
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14.
During a walk around inspection of a combination vehicle, drivers should check that:
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the glide plate is securely mounted to the trailer frame.
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all locking pins are present and locked in place.
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All of the above.
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15.
In your mirror, you see a car approaching from the rear. The next time you check your mirror, you don't see the car. If you wish to change lanes, you should:
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assume the car left the roadway and change lanes as normal.
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ease into the other lane slowly so the other car can get out of the way.
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wait until you are sure the car isn't in your blind spot.
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16.
What is a tractor jackknife?
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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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17.
Which of the following is NOT a step in backing up with a trailer?
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Looking at your line of travel before you begin
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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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18.
If a drawbridge does not have a signal light or traffic control attendant, you should:
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drive through the drawbridge with caution.
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stop and look to make sure the draw is completely closed before crossing.
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stop at least 5 feet before the draw of the bridge.
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19.
The tire load rating is stated:
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on each axle.
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on the side of each tire.
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inside the suspension system.
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20.
The wheels of a large combination vehicle are more likely to lock up when:
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the vehicle is lightly loaded.
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the trailer has new tires.
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the vehicle is heavily loaded.
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