HAZMAT CDL PRACTICE TEST - IOWA
21.
Rollovers happen when drivers:
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turn too fast.
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brake too hard.
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turn too slowly.
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22.
To avoid rollbacks when you start, you should:
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release the parking brake only when you have applied enough engine power.
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if you have manual transmission, partly engage the clutch before you take your right foot off the brake.
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All of the above.
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23.
Air brakes use ________ to make the brakes work.
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compressed gas cylinders
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compressed air
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compressed gases
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24.
Placards are:
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used to warn others when the Gross Vehicle Weight (GVW) exceeds 10,000 pounds.
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signs put on the outside of a vehicle that identify the hazard class of the cargo.
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signs put on the inside of a vehicle that remind the driver of the type of cargo he or she is carrying.
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25.
Which of these statements about using your mirrors is FALSE?
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There are blind spots that your mirrors cannot show you.
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When driving, you should check mirrors regularly to know where other vehicles are around you.
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None of the above.
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26.
________ display the ID number of their contents on placards or orange panels.
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The back of the truck and the gas tank
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The gas tank and other bulk packaging
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Cargo tanks and other bulk packaging
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27.
You should always be able to stop within:
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100 feet.
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the distance you can see ahead.
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50 feet.
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28.
Overloading can have negative effects on:
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braking.
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steering.
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All of the above.
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29.
When driving in extremely hot weather, if the air pressure in the tires is too high, you should:
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continue driving.
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stop and remain stopped until the tires cool off.
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let air out of the tires to decrease pressure.
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30.
When going down a steep downgrade, you should primarily brake using:
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the parking brake.
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the braking effect of the engine.
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the service brakes.
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