CDL DOUBLES PRACTICE TEST OREGON
11.
With an engine fire, you should:
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open the hood as soon as possible.
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turn the engine off as soon as possible.
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not shoot foam from the vehicle’s underside.
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All of the above.
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12.
On any upgrade, _________ – the more you will have to use lower gears to climb hills or mountains.
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the heavier the load
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the steeper the grade
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the longer the grade
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All of the above.
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13.
Warnings on low bridges or underpasses:
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are often posted, but sometimes they are not.
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must be posted.
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are always posted.
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None of the above.
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14.
"Bobtail" tractors are:
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tractors without semitrailers.
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tractors with a tank.
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tractors with two trailers.
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heavily loaded trailers.
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15.
No matter how small the cargo is, it should have at least:
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4 tie-downs.
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2 tie-downs.
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1 tie-down.
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6 tie-downs.
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16.
When driving a double or triple:
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the lighter trailer should be directly behind the tractor.
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the more heavily loaded trailer should be directly behind the tractor.
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the more heavily loaded trailer should be in the rear.
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all trailers should have the same weight.
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17.
Which of the following will NOT help you prevent rollover?
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Using the controlled braking method.
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Keeping the cargo as close to the ground as possible.
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Driving slowly around turns.
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All of the above.
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18.
Older trailers do not have spring brakes. If the air supply leaks away:
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there will be no emergency brakes.
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the trailer will stop normally.
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the ABS won't work properly.
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All of the above.
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19.
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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50 feet, 100 feet, and 150 feet toward the approaching traffic.
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20.
If brakes fail on a long downgrade, you should:
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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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set the parking brake.
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pump the brake pedal 3 times.
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