OREGON CDL AIR BRAKES PRACTICE TEST
16.
You are going down a steep grade. Once the vehicle is in the proper low gear, you should brake just hard enough to feel a slowdown, and then release the brakes when your speed has been reduced to ____ below your safe speed.
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20 mph
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5 mph
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10 mph
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15 mph
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17.
Having ABS on only the trailer:
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still gives you more control over your vehicle during braking.
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makes the trailer more likely to roll over.
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makes the trailer more likely to swing out.
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is very dangerous.
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18.
A tank endorsement is:
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only required when transporting gases.
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required for both liquids and gases.
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not required when transporting hazardous materials.
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only required when transporting liquids.
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19.
With the air pressure built up to governor cutoff, the maximum leakage rates per minute after the initial pressure drop are:
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3 psi for single vehicles and 4 psi for a combination of 2 vehicles.
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1 psi for single vehicles and 2 psi for a combination of 2 vehicles.
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5 psi for single vehicles and 6 psi for a combination of 2 vehicles.
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4 psi for single vehicles and 2 psi for a combination of 2 vehicles.
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20.
When coupling, you should:
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make sure the trailer kingpin is bent.
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make sure the sliding fifth-wheel is locked.
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be aware that wrong coupling and uncoupling can be very dangerous.
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make sure the trailer wheels are not chocked.
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