CDL GENERAL KNOWLEDGE TEST (OR) - PRACTICE TEST
21.
When you use mirrors while driving on the road, you should:
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check quickly.
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only use one mirror.
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never look back and forth between the mirrors and the road ahead.
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focus on the mirrors for a long time.
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22.
As your blood alcohol concentration (BAC) builds up, which of the following is affected?
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Muscle control
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Vision
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Coordination
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All of the above.
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23.
When driving on long and/or steep downgrades, to select an appropriate safe speed you should consider:
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the length of the grade.
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the road conditions.
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the total weight of the vehicle and cargo.
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All of the above.
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24.
Wheel rims that have had welding repairs:
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are safe.
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should be placed in the front.
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should not be used.
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None of the above.
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25.
Total stopping distance equals:
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Perception distance + reaction distance + braking distance
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Braking distance + viewing distance
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Perception distance + braking distance
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Reaction distance - following distance + braking distance
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26.
After a tire has been changed, you should:
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decrease tire pressure.
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stop a short while later and check that the nuts are tight.
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wait at least 30 minutes before driving.
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deflate the tire to 15 psi.
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27.
To stay alert while driving, you should:
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avoid medications that can cause drowsiness.
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rely on caffeine.
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never open the window or use the air conditioner.
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All of the above.
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28.
Which of the following is NOT a correct action in the event of brake failure?
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Putting the vehicle into a lower gear.
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Weaving from side to side to slow down.
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Using the parking brake.
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Looking for an escape route.
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29.
Which of the following is a key steering system part?
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Anchor plate
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U-bolts
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Tie rod
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Leaf spring
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30.
When inspecting a vehicle's suspension, you should look for broken or missing leaves in the leaf springs. If ____ or more are missing, it will put the vehicle out of service.
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15%
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10%
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50%
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25%
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