CDL GENERAL KNOWLEDGE TEST (AK) - PRACTICE TEST
21.
Air brakes:
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should be used only when driving on wet roads.
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are an effective way to stop large and heavy vehicles.
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are prohibited on larger vehicles.
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22.
Hydroplaning:
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can occur only if there is a lot of water on the road.
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can occur at speeds as low as 30 mph.
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is less likely if tire pressure is low.
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23.
You should check air pressure and temperature gauges:
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at the end of each trip.
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as often as is practical.
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at the beginning of each trip.
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24.
When backing, if you are unsure you should:
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get out of your vehicle and check your path.
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turn toward the passenger's side.
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call your dispatcher.
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25.
Fully loaded trucks require greater stopping distances than empty vehicles. True or False?
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True, but only if the truck was built after 1998.
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True, but only on wet surfaces.
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False.
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26.
When you check your tires, you should look for all of the following EXCEPT:
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Tread separation
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Dual tires that come in contact with parts of the vehicle
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Tires from different manufacturers
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27.
Your safety equipment must include:
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a dimmer switch.
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a properly charged and rated fire extinguisher.
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spare electrical fuses (only if your vehicle is equipped with circuit breakers).
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28.
To release the parking brakes:
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pump the brake pedal 3 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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29.
If brakes fail on a long downgrade, you should:
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turn off the engine as soon as you.
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use an escape ramp if it is available.
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pump the brake pedal 3 times.
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30.
When the road is very slippery, you should:
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stop at the first safe place.
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downshift to stop.
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use the parking brake instead of the service brake.
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