OHIO CDL DOUBLES TRIPLES PRACTICE TEST
11.
When should you turn the retarder off?
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when the road is slippery.
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when the cargo is heavy.
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when your vehicle has a high center of gravity.
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12.
If your brakes fail on a steep mountain downgrade, you should:
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go right if the shoulder is clear.
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use an escape ramp if it is available.
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leave the road immediately.
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13.
Which of the following will NOT help you prevent rollover?
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Driving slowly around turns.
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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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14.
Before driving a vehicle with a dual brake brake system, the driver should:
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pump the brake pedal 10 times to build pressure.
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allow time for the air compressor to build up a minimum of 100 psi pressure in both the primary and secondary systems.
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wait at least 10 minutes before driving.
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15.
You are driving a heavy vehicle with a manual transmission, and you have to stop on the shoulder while driving on an uphill grade. When putting your vehicle back in motion up the grade, you should:
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shift down to a speed that you can control without using the brakes.
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partly engage the clutch before you take your right foot off the brake.
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use the parking brake to hold the vehicle until the clutch engages.
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16.
What factors can cause brakes to fade?
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Excessive heat and brakes out of adjustment.
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Dirt roads and in unpaved yards.
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Slippery surfaces and shaded areas.
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17.
The trailer hand valve should be used:
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to check that the trailer emergency brakes are on.
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to test the trailer brakes.
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to check that the trailer is locked onto the tractor.
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18.
A trailer jackknife is more likely to happen when the trailer is:
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empty.
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overloaded.
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loaded to its full capacity.
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19.
Which of the following will off-track the most?
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The front wheels of the last trailer.
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The rear wheels of the last trailer.
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The rear wheels of the tractor.
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20.
Watch out for black ice:
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when it is snowing.
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any time the temperature is below freezing and the road looks wet.
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when the temperature is above freezing and the road is dry.
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