AZ CDL DOUBLES TRIPLES TEST - PRACTICE TEST
11.
An alcohol evaporator:
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is used to reduce the risk of ice in air brake valves and other parts during cold weather.
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protects the air brake system from too much pressure.
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used to reduce the chance of the front wheels skidding.
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12.
If the engine catches fire, you should:
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open the hood as soon as you can.
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turn off the engine as soon as you can.
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avoid shooting foam from the vehicle's underside.
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13.
The posted speed limit for a curve:
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is safe for all vehicles.
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may be too fast for many trucks or buses.
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is safe for trucks or buses, but it may be too fast for cars.
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14.
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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15.
The weight of a truck:
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has no effect on stopping distance.
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has an impact on stopping distance.
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is not as important as the vehicle's center of gravity in determining stopping distance.
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16.
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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shifting into neutral may help slow the vehicle.
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pumping the brake pedal may generate enough hydraulic pressure to stop the vehicle.
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17.
When connecting to the rear trailer, the trailer height should be:
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the same height as the fifth-wheel.
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lower than the center of the fifth-wheel.
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higher than the center of the fifth-wheel.
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18.
If a load is 10 feet long, the minimum number of tie-downs required is:
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2
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1
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3
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19.
A bridge formula permits:
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more maximum axle weight for axles that are closer together.
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less maximum axle weight for axles that are far apart.
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less maximum axle weight for axles that are close together.
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20.
Air storage tanks:
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hold compressed air for the brakes.
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use parts of the service brake systems to stop the vehicle in a brake system failure.
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pump air into the air storage tanks.
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