CDL DOUBLES PRACTICE TEST SOUTH DAKOTA
11.
Your mirrors should be adjusted so that:
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a part of the vehicle is visible in the mirror.
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no part of the vehicle is visible in the mirror.
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more than half of the mirror shows the vehicle.
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the rear of the vehicle is visible in the mirror.
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12.
At dawn, dusk, in rain or snow, to make yourself easier to see you should:
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use the emergency flashers.
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use the parking lights.
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use the high beams.
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use the low beams.
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13.
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. Charge the trailer air tank. 3. Drive the tractor close to the trailer 4. Disconnect 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. 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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14.
You should test the coupling by:
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applying the parking brakes so the rig will not move.
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pulling against the pin of the second semitrailer.
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locking the pintle hook.
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disconnect the safety chains.
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15.
Rough acceleration can cause:
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tire damage.
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mechanical damage.
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damage electrical and brake lines.
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All of the above.
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16.
What is Gross Vehicle Weight?
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The total weight of a single vehicle, including its load
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The total weight of a single vehicle, excluding its load
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The total weight of the cargo
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The total weight of a combination of vehicles excluding the load
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17.
When backing, you should:
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avoid using the mirrors.
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back and turn toward the right side.
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use a helper if possible.
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back quickly.
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18.
Radial and bias-ply tires:
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should be used together only during bad weather.
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should be used together.
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should not be used together.
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should be used together only when driving in packed snow.
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19.
Doubles/triples are:
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usually faster than most CMVs.
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more stable than other CMVs.
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easier to drive than other CMVs.
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less stable than other CMVs.
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20.
During a walk around inspection of a double or triple trailer, make sure that the converter dolly air tank drain valve is _____ and the glad hands are ______.
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open; properly connected
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closed; properly connected
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closed; not connected
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open; not connected
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