NORTH DAKOTA CDL DOUBLES TRIPLES PRACTICE TEST
11.
When driving in very hot weather, you may have to:
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increase your speed until the tires cool off.
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reduce your speed to prevent overheating.
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watch out for black ice.
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decrease your following distance.
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12.
Too much weight on the steering axle can cause:
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better handling.
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hard steering and damage to the steering axle and tires.
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poor traction.
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None of the above.
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13.
Which of the following statements about retarders is NOT correct?
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You should turn the retarder off whenever the road is wet, icy, or snow covered.
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Retarders help slow a vehicle, reducing the need for using brakes.
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Retarders reduce reduce brake wear.
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Retarders help you avoid skids.
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14.
When the wheels of a trailer lock up, which of the following is most likely to occur?
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The trailer will the trailer
has overturn.
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The trailer will tend to swing around (trailer jackknife).
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The rig will stay in a straight line but slide sideways.
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The trailer will tend to push the towing vehicle sideways (tractor jackknife).
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15.
When making a turn you should:
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honk your horn.
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signal early.
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turn the signal off before entering the turn.
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make gestures to get the attention of other drivers.
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16.
Which of the the following statements about fatigue is true?
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Fatigue may cause you to not see and react to hazards.
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Fatigue impairs your vision and judgment.
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Fatigued driving is one of the leading causes of accidents.
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All of the above.
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17.
Emergency lines are often coded with the color ___ to keep from getting them mixed up with the service line.
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white.
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red.
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yellow.
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blue.
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18.
If the drive wheels start to skid:
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use the brakes to slow down.
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accelerate slightly to regain control.
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push in the clutch to let them turn freely.
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All of the above.
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19.
Which of the following vehicles is most likely to turn over?
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65 ft. conventional double
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5 axle tractor semitrailer
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Triple trailer
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3 axle tractor semitrailer
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20.
A low air pressure warning signal:
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is required on all vehicles without air brakes.
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is optional on vehicles with air brakes.
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is required on vehicles with air brakes.
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None of the above.
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