CDL PRACTICE TEST - GENERAL KNOWLEDGE (IOWA)
11.
When feeling fatigued you should:
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drink a cup of coffee.
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stop and rest.
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continue driving.
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12.
Brakes out of adjustment can cause the other brakes to:
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last longer.
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apply more braking power.
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overheat and fade.
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13.
The amount of liquid to load into a tank depends on:
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the amount the liquid will expand in transit.
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the weight of the liquid.
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All of the above.
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14.
Your vehicle has hydraulic brakes. When you press the brake pedal while driving and the pedal goes to the floor, remember that:
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the parking brake should never used to slow the vehicle.
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pumping the brake pedal may generate enough hydraulic pressure to stop the vehicle.
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shifting into neutral may help slow the vehicle.
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15.
In newer vehicles with air brakes, you put on the parking brake:
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placing the transmission in Park.
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using a P-shaped, yellow control knob.
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using a diamond-shaped, yellow, push-pull control knob.
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16.
To test the stopping action of your service brakes, go about:
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5 mph.
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50 mph.
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15 mph.
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17.
You should wear seat belts:
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only when you are hauling hazardous materials.
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anytime you are in a moving vehicle.
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only in states where it is required by law.
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18.
Cargo tie-downs are used to:
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prevent freezing.
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keep cargo from shifting or falling.
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prevent right-turn accidents.
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19.
When using a fire extinguisher, you should stay:
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as close to the fire as possible, without getting burnt.
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at least 10 feet away from the fire.
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as far away from the fire as possible.
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20.
To prevent getting sleepy while driving, you should:
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keep the cab warm.
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keep cool by opening the window.
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drive alone whenever possible.
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