CDL GENERAL KNOWLEDGE TEST (IOWA) - PRACTICE TEST
11.
Front-end header boards:
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can cause your vehicle to hydroplane.
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protect your from glare and eyestrain.
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protect you from your cargo in case of an accident.
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12.
When driving, you should:
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avoid checking your mirros often.
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check your mirrors regularly.
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use your mirrors only when changing lanes.
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13.
Confused drivers may:
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stop without warning.
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change direction suddenly.
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All of the above.
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14.
You must have at least ________ tread depth in every major groove on front tires.
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1/2 inch
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1/16 inch
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4/32 inch
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15.
What are some advantages of going right instead of left around an obstacle?
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Someone may be passing to the left.
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You can avoid a head-on collision.
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All of the above.
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16.
Which of the following statements is true?
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An empty van is lower than a loaded one.
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The heights posted at bridges and overpasses are always correct.
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The weight of a cargo van changes its height.
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17.
The two ways of knowing when to shift are:
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weather and road conditions.
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engine speed and road speed.
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following distance and traffic speed.
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18.
Which of these statements about using your mirrors is FALSE?
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There are blind spots that your mirrors cannot show you.
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When driving, you should check mirrors regularly to know where other vehicles are around you.
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None of the above.
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19.
If the vehicle ahead of you is smaller than yours:
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it can probably stop faster than you can.
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it will usually take longer to stop.
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it will take the same amount of time to stop.
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20.
Tar in the road pavement often rises to the surface in very hot weather. Spots where the tar "bleeds":
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will help you get better gas mileage.
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have good traction.
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are very slippery.
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