OKLAHOMA DOUBLES TRIPLES PRACTICE CDL TEST
11.
Most heavy duty vehicles use ___ air brake systems for safety.
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triple
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single
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dual
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12.
For a cargo fire in a box trailer, you should:
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keep the doors shut.
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open the doors immediately and use the fire extinguisher.
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wait 10 minutes before opening the doors.
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13.
If you become drowsy while driving, you should:
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take a break.
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open the windows to get some fresh air.
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drink plenty of coffee.
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14.
Foundation brakes are used:
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at each wheel.
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only with the right wheels.
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only with the front wheels.
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15.
When going down grades, you should:
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put the transmission in Neutral.
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shift up.
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downshift to a lower gear.
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16.
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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17.
If brakes fail on a long downgrade, you should:
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turn off the engine as soon as you.
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use an escape ramp if it is available.
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pump the brake pedal 3 times.
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18.
To prevent a rollover, the driver should:
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make quick lane changes if possible.
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drive slowly around corners, on ramps, and off ramps.
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drive on the shoulder if possible.
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19.
It's very important to distribute the cargo so it is:
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as high up as possible.
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in the centre of the load.
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as low as possible.
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20.
When the wheels of a trailer lock up, which of the following is most likely to occur?
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The trailer will the trailer
has overturn.
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The trailer will tend to swing around (trailer jackknife).
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The trailer will tend to push the towing vehicle sideways (tractor jackknife).
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