CDL PRACTICE TEST - GENERAL KNOWLEDGE (OREGON)
11.
Traction is:
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the maximum safe weight a tire can carry at a specified pressure.
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friction between the tires and the road.
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friction between the front and rear tires.
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the distance your vehicle will travel while you
are braking.
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12.
Checking your vehicle's suspension system includes checking:
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the mounting brackets.
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the air suspension systems.
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the tires.
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All of the above.
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13.
If you will be transporting hazardous materials that require placards, you must:
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obtain a hazardous materials endorsement.
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ask permission of the local transportation agency.
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transport the materials at night only.
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obtain a special transit permit.
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14.
To apply the parking brakes:
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place the parking brake control knob in Neutral.
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push the brake pedal three times.
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pull the parking brake control knob out.
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push the parking brake control knob in.
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15.
If you have to drive off the road to avoid a collision, you should:
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keep one set of wheels on the pavement, if possible.
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stay on the shoulder until your vehicle has come to a stop.
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avoid braking.
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All of the above.
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16.
Too much weight on the steering axle can cause:
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poor traction.
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hard steering and damage to the steering axle and tires.
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better handling.
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None of the above.
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17.
Two of the most common causes of tire fires are:
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Over-inflated tires and duals that touch.
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Driver smoking and bleeding tar.
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Duals that touch and under-inflated tires.
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Loose lug nuts and duals that touch.
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18.
To test the parking brake:
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gently try to pull forward with the parking brake on.
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step on and off the brake pedal to reduce air pressure.
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check that all shut-off valves are in the open position.
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turn off the engine.
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19.
Before each trip, you must make sure the truck is not overloaded and the cargo is balanced and secured properly. Hard steering can be caused by:
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high center of gravity.
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under loaded front axles.
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too little weight on the driving axles.
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too much weight on the steering axles.
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20.
Which of the following helps keep the engine cool in hot weather?
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Driving faster to force more air into the radiator.
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Making sure there is enough engine oil.
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Making sure the anti-lock braking system is on.
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All of the above.
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