GENERAL KNOWLEDGE CDL TEST OREGON - PRACTICE TEST
21.
Which of these vehicles must come to a complete stop at railroad grade crossings?
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Heavy equipment
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Trucks carrying explosives
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School buses
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All of the above.
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22.
The safety relief valve is located:
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in the first tank the air compressor pumps air to.
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on the dashboard.
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in the front brake.
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on each end of the vehicle's axles.
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23.
Why should you cover your cargo?
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To protect the cargo from weather.
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Because spill protection is a safety requirement in many states.
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To protect people from spilled cargo.
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All of the above.
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24.
When inspecting your vehicle, before checking the engine compartment be sure that:
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the fire extinguisher is properly charged and rated.
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all tires are properly inflated.
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the parking brakes are on and/or wheels chocked.
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all lights are working.
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25.
Before transporting a sealed load, you must check that:
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the seal on the load is secure.
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the placard numbers and the seal numbers match.
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the load is properly secured.
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the cargo is piled up.
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26.
Older trailers do not have spring brakes. If the air supply leaks away:
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the ABS won't work properly.
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the trailer will stop normally.
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there will be no emergency brakes.
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All of the above.
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27.
When changing lanes, you should:
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turn sharply.
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do it quickly so other vehicles won't get into the lane.
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ensure that the vehicle behind you has moved into your blind spot.
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do it slowly, so a driver you did not see may have a chance to honk their horn.
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28.
When inspecting your vehicle for suspension system defects, look for:
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leaking shock absorbers.
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missing or broken leaves in any leaf spring.
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cracked or broken spring hangers.
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All of the above.
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29.
When passing a vehicle, you should NOT:
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drive carefully enough to avoid an accident.
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at night, flash your lights from low to high beam and back.
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assume the other driver does not see you.
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keep blowing your horn while passing.
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30.
The total weight of a single vehicle including its load is called:
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Gross Vehicle Rating (GVR)
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Gross Vehicle Weight (GVW)
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Gross Combination Weight (GCW)
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Gross Vehicle Weight Rating (GVWR)
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