CDL DOUBLES PRACTICE TEST MINNESOTA
11.
Too little weight on the driving axles can cause:
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poor traction.
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longer stopping distances.
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poor visibility.
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mechanical damage.
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12.
Which of the following is a common cause of truck fires?
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Under-inflated tires and duals that touch.
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loose fuel connections.
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Short circuits due to loose connections.
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All of the above.
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13.
If you doubt you have enough space to pass under a bridge, you should:
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turn on your 4-way emergency flashers.
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turn on your headlights.
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go slowly.
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drive faster.
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14.
Front-end header boards:
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should never be used.
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reduce traction.
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protect drivers from spilled cargo.
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protect drivers from cargo in case of an accident or emergency stop.
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15.
If brakes fail on a long downgrade, you should:
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set the parking brake.
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use an escape ramp if it is available.
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turn off the engine as soon as you.
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pump the brake pedal 3 times.
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16.
When coupling double trailers, if the second trailer does not have spring brakes, to set the trailer emergency brakes you should:
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1. Disconnect the emergency line 2. Drive the tractor close to the trailer 3. Charge the trailer air tank 4. Connect the emergency line.
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1. Connect the emergency line 2. Drive the tractor close to the trailer 3. Disconnect the emergency line 4. Charge the trailer air tank.
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1. Connect the emergency line 2. Charge the trailer air tank. 3. Drive the tractor close to the trailer 4. Disconnect the emergency line.
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1. Drive the tractor close to the trailer 2. Connect the emergency line 3. Charge the trailer air tank 4. Disconnect the emergency line.
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17.
The minimum number of mirrors a registered vehicle must have is:
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4
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1
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3
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2
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18.
During freezing weather, which area is most likely to be slippery after it rains?
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Roads that look wet.
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Shaded areas.
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Bridges.
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All of the above.
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19.
Who is responsible for inspecting the cargo?
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The motor carrier
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The driver
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The shipper
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The person who loaded and secured the cargo
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20.
Your vehicle has hydraulic brakes. When you press the brake pedal while driving and the pedal goes to the floor, remember that:
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pumping the brake pedal may generate enough hydraulic pressure to stop the vehicle.
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the parking brake should never used to slow the vehicle.
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shifting into neutral may help slow the vehicle.
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All of the above.
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