SC CDL PRACTICE TEST - GENERAL KNOWLEDGE
11.
Under-loaded front axles:
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can cause tire failure.
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can improve traction.
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can make the steering axle weight too light to steer safely.
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All of the above.
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12.
If a tire fails while you are driving, you should:
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stop on the roadway if possible.
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call your supervisor for instructions.
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brake as hard as possible.
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stay off the brake
until your vehicle has slowed down.
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13.
When steering to avoid a crash, you should:
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not turn any more than needed to clear the hazard.
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lock your wheels while turning.
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accelerate and steer at the same time.
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apply the brake while you are turning.
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14.
If your truck has automatic transmission, you should downshift:
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when going down grades.
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whenever road conditions allow.
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after entering a curve.
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when you need to accelerate.
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15.
The best way to recover from a brake failure while going downhill is to:
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use the escape ramp.
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be prepared to countersteer.
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use engine braking.
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use the parking brake.
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16.
Passive railroad crossings:
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should never be crossed using a CMV.
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do not have traffic control devices.
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usually have a person directing traffic.
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have at least one traffic control device.
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17.
Suspension systems:
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specify the loaded weight of a single vehicle.
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have a weight capacity rating.
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are rated for the maximum weight the vehicle can pull.
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have a minimum weight rating.
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18.
Which of the following will not prevent distracted driving?
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Planning your route before you begin driving.
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Clearing the vehicle of any unnecessary objects.
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Pre-programming radio stations.
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Using your phone only when there is no traffic around you.
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19.
You should not use your horn unnecessarily. Why?
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The horn on a vehicle wears out very quickly
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On vehicles possessing air brakes, it uses up air pressure you may need to be able to stop
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The horn can startle other drivers, which could be dangerous.
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All of the above.
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20.
Air brakes:
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are an effective way to stop large and heavy vehicles.
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should be used only when driving on wet roads.
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are prohibited on larger vehicles.
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can improve fuel efficiency.
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