CDL COMBINATION PRACTICE TEST CALIFORNIA
11.
Which of the following will NOT help you prevent rollover?
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Keeping the cargo as close to the ground as possible.
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Using the controlled braking method.
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Driving slowly around turns.
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12.
To prevent rollover, drivers of combination vehicles should:
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keep the load is to one side.
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brake while turning.
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keep the cargo as close to the ground as possible.
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13.
You are driving a modern truck with a manual transmission. When going down a hill you should usually:
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shift into neutral and coast.
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use the same gear you would use to go up the hill.
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use a lower gear than would be required to go up the hill.
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14.
To test the tractor-semitrailer connection for security:
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plug the electrical cord into the trailer and fasten the safety catch.
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pull out the air supply knob.
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check that the trailer is locked onto the tractor by pulling the tractor gently forward while the trailer brakes are still locked.
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15.
When the wheels of a trailer lock up, the trailer will tend to swing around. This is more likely to happen when:
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the trailer is fully loaded.
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the trailer is empty or lightly loaded.
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the trailer is overloaded.
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16.
Under-loaded front axles can:
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cause poor traction.
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make the steering axle weight too light to steer safely.
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All of the above.
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17.
When you get ready to back under the semi-trailer, you should:
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back under the trailer at an angle to avoid pushing the trailer sideways.
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line up directly in front of the trailer.
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line up about 15 degrees off the line of the trailer.
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18.
The proper following distance for a 60-foot vehicle traveling at 50 mph is:
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7 seconds
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4 seconds
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6 seconds
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19.
The two most important things that a driver can do to prevent a rollover when driving a combination vehicle are:
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Driving slowly around turns and keeping the cargo as close to the ground as possible
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Keeping cargo near center of vehicle and driving slowly on the highway
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Keeping cargo near the center of the vehicle and driving slowly on turns
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20.
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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