MAINE CDL DOUBLES TRIPLES PRACTICE TEST
11.
If you must stop on a one-way or divided highway, place your warning devices:
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100 feet, 200 feet, and 300 feet toward the approaching traffic.
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10 feet, 50 feet, and 150 feet toward the approaching traffic.
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10 feet, 100 feet, and 200 feet toward the approaching traffic.
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12.
The safety valve is usually set to open at:
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100 psi.
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150 psi.
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200 psi.
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13.
When backing a trailer, you should turn the steering wheel to the right to make the trailer go left (or vice versa). Once the trailer starts to turn, you should:
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turn the wheel the other way to follow the trailer.
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keep backing up.
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turn the wheel more in the direction you want to go.
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14.
Pre-trip inspections are:
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required by law
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required only for trips of more than 50 miles.
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recommended.
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15.
Air pressure should build up in a single air system, within about:
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15 minutes.
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10 minutes.
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3 minutes.
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16.
If there is a cargo fire in a van or box trailer, you should:
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enlist the help of bystanders.
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keep the doors shut.
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open the doors, especially if your cargo contains hazardous materials.
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17.
The service line is also called:
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brake line.
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control line.
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cable line.
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18.
When checking the engine compartment in a vehicle inspection, you should check all of the following except:
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Windshield washer fluid level
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Engine oil level
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Shock absorbers
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19.
When driving a truck with more than 1 trailer, drivers should:
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be especially careful in adverse conditions.
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allow more following distance.
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All of the above.
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20.
Rollovers happen when drivers:
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turn too slowly.
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turn too fast.
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brake too hard.
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