AL CDL GENERAL KNOWLEDGE TEST - CDL PRACTICE TEST
21.
How do you find out how many seconds of following distance you have?
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Pass a stationary object and count how many seconds it takes the vehicle ahead of you to reach the same spot.
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Wait until the vehicle ahead of you passes a pavement marking, shadow or landmark. Then count off the seconds until you reach the same spot.
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Wait until the vehicle ahead of you passes a pavement marking or some other clear landmark, then use the stopwatch on your mobile phone to see how long it takes you to reach the same spot.
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None of the above.
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22.
When using a fire extinguisher on a fire, you should:
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get as close to the fire as possible.
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stay as far away from the fire as possible.
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aim the extinguisher at the top of the fire.
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All of the above.
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23.
When should you use the 4-way emergency flashers instead of flashing the brake lights to warn the drivers behind you?
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When driving in strong winds.
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When visibility is poor.
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At night time.
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When you are driving very slowly or are stopped.
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24.
An alcohol evaporator:
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protects the air brake system from too much pressure.
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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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used to reduce the chance of the front wheels skidding.
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to hold compressed air.
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25.
For safety during a trip, you should:
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watch gauges for signs of trouble.
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check critical items when you stop.
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use your senses to check for problems.
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All of the above.
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26.
You must use ________ as the principal way of controlling your speed on downgrades.
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controlled braking
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the brake pedal
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the braking effect of the engine
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"Maximum Safe Speed"
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27.
After a tire has been changed, the driver should stop a short while later to:
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check the tightness of the nuts.
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decrease tire pressure.
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deflate the tire to 10 psi.
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check tread separation.
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28.
When starting your vehicle, oil pressure should come up to normal:
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within seconds.
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within 5 minutes of driving.
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in about two minutes.
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in about a minute.
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29.
When should you turn the retarder off?
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when the cargo is prone to shifting.
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when the cargo is heavy.
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when the road is slippery.
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when your vehicle has a high center of gravity.
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30.
Service lines are often coded with the color ____ to keep from getting them mixed up with the emergency line.
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red
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orange
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blue
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yellow
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