CDL COMBINATION PRACTICE TEST (OK)
11.
What is the proper following distance for a 50 foot truck traveling at 50 mph?
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25 seconds
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5 seconds
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6 seconds
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12.
You have two tie-downs on a 15 foot load. How many more tie-downs do you need to secure cargo and keep it from shifting or falling?
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One
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None
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Two
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13.
Most heavy vehicles require ________ change gears.
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single clutching
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double shifting
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double clutching
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14.
If the safety relief valve in the air brake system releases air:
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something is wrong.
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this will supply more power to the brakes.
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the valve is fully operational.
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15.
If the drive wheels begin to spin when accelerating, you should:
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take your foot off the accelerator.
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continue to accelerate.
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brake gently.
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16.
Foundation brakes are used:
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only with the right wheels.
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at each wheel.
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only with the front wheels.
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17.
Never
drive with landing gear only part way up. Why?
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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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It may catch on railroad tracks.
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18.
What is the proper following distance for a 40 foot truck traveling at 35 mph?
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4 seconds
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10 seconds
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12 seconds
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19.
The best way to test the trailer service brakes is to:
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pull forward quickly, then apply the trailer brakes with your hand control.
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accelerate to the maximum possible speed, then apply the trailer brakes fully.
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None of the above.
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20.
If a load is 50 feet long, the minimum number of tie-downs required is:
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5
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4
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10
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