IOWA CDL PRACTICE TEST - GENERAL KNOWLEDGE
11.
If driving a heavy vehicle, you should:
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stay in the right lane.
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try to pass other vehicles going uphill.
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stay in the left lane.
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12.
Blocking and bracing are:
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coupling devices used to connect the service air lines from the truck or tractor to the trailer.
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driving techniques used to regain control when your drive wheels start to skid.
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used to keep cargo from sliding and to prevent movement of cargo.
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13.
Fully loaded rigs:
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are just as likely to roll over as empty rigs.
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are much more likely to roll over than empty rigs.
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are less likely to roll over than empty rigs.
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14.
When going down long, steep downgrades, you should:
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downshifting and then use the brakes.
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try not to use the brakes.
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only use the brakes.
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15.
When you have to back, you should always try to back toward the driver's side because:
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you can see better and watch the rear of your vehicle out the side window.
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backing toward the left side is more dangerous.
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None of the above.
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16.
Drivers operating CMVs must notify their employer within ______ of a conviction for any traffic violation (except parking).
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3 days
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7 days
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30 days
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17.
Name 2 causes of tire fires.
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Driver smoking and bleeding tar.
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Under-inflated tires and duals that touch.
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Loose connections and poor ventilation.
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18.
When driving on a slippery surface, you should do all of the following except:
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adjust braking to conditions.
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not pass slower vehicles unless necessary.
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keep a shorter following distance.
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19.
How does ABS help you?
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ABS makes stab braking more effective.
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ABS replaces your normal brakes and helps you to stop faster.
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ABS helps you avoid wheel lock up and maintain control when you brake hard on slippery surfaces.
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20.
Which of the following statements about retarders is NOT correct?
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Retarders help you avoid skids.
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Retarders help slow a vehicle, reducing the need for using brakes.
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You should turn the retarder off whenever the road is wet, icy, or snow covered.
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