CDL PRACTICE TEST (DC) - GENERAL KNOWLEDGE TEST
11.
Which of the following statements about using turn signals is true?
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To turn safely you must keep one hand on the wheel.
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You should use your turn signals when your vehicle is parked at the side of the road.
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To keep others from trying to pass you, you should signal just before you turn.
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None of the above.
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12.
To test for hydraulic leaks, you should:
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pump the brake pedal three times, then hold the pedal for five seconds. The pedal should not move.
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apply the brakes firmly using the brake pedal and check to see if the brake pedal returns to its normal position.
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keep the wheels locked up after you release the brakes.
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use the stab braking method, then re-apply the brakes as soon as you can.
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13.
When you drive a tractor-trailer combination with ABS, you should:
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pump the brakes.
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apply the trailer hand brake whe braking.
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always apply the brakes hard.
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brake as you always have.
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14.
Your vehicle must be equipped with:
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Fire extinguisher(s)
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Warning devices for parked vehicles
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Spare electrical fuses
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All of the above.
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15.
Which of the following is a reason to cover cargo?
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To contain a spill
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To protect people from spilled cargo
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To protect the cargo from weather
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All of the above.
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16.
To make sure you always have overhead clearance, you must be aware that ________ may have reduced the clearances since the heights were posted.
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packed snow
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water on the road
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warm temperatures
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the weight of the cargo
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17.
When driving a 50 foot vehicle at 50 mph, how much space should you keep in front of you?
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4 seconds
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6 seconds
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3 seconds
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5 seconds
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18.
Which of the following is NOT a hazard?
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A cardboard box on the road
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An escape ramp
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Work zones
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A freeway/highway exits that
go downhill
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19.
During the vehicle inspection, when checking the tires you should:
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check for the minimum tread depth (4/32 on all tires).
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ensure that the tread is evenly worn.
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ensure the middle of the tires is more worn than the outside.
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ensure that valve caps are missing.
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20.
To prevent rolling back when you start, if you have a manual transmission you should:
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use the lowest reverse gear.
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never the parking brake.
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over-accelerate.
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partly engage the clutch before you take your right foot off the brake.
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