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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Oregon CDL combination test consists of 20 questions, and you'll need at least 16 correct answers to pass (80%). The test covers the combination vehicles section of the Oregon CDL Manual. Take this practice test now to prepare for the actual OR CDL combination test!
1. While driving, you should use your mirrors to:
check the condition of the tires and cargo.
know where other vehicles are around you.
check where the rear of your vehicle is while you make turns.
All of the above.
2. The posted speed limit:
should only be exceeded when passing other vehicles.
should never be exceeded.
is only a suggestion.
may only be exceeded when driving in rural areas.
3. Blocking _______________ to keep it from sliding.
goes from the upper part of the cargo to the floor
is used in the front, back, and/or sides of a piece of cargo
is used only in the back of a piece of cargo
None of the above.
4. When more cargo is piled up in a truck, the truck becomes easier to turn over. Fully loaded rigs are _________ to roll over in a crash than empty rigs.
less likely
ten times more likely
five times more likely
three times more likely
5. During your inspection, you should look into the fifth-wheel gap and check that the _________ are fully closed around the kingpin.
lug nuts
couplings (U-joints)
mounting bolts
locking jaws
6. Before entering a curve, you should:
come to a complete stop.
increase your speed.
maintain your speed.
reduce your speed.
7. _________ can make vehicle handling unsafe.
Dry roads
Poor weight balance
Poor ventilation
ABS
8. To test the service brake:
push the brake pedal firmly while slowly moving backward.
gently try to pull forward with the trailer parking brake on, then release the brake.
shift your transmission to a low gear, pump the brake pedal three times, then hold it down for five seconds.
push the brake pedal firmly while going about 5 mph.
9. To stop a trailer skid, you should:
countersteer to get traction back.
use the brakes to slow down.
release the brakes to get traction back.
use the trailer hand brake to straighten out the rig.
10. You should use chocks when parking a trailer without spring brakes because:
the brakes will hold only as long as there is air pressure in the trailer air tank.
it is required by law.
it helps prevent brake failure.
it helps prevent skids.
 
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OR CDL Combination Test

Number of questions: 20
Correct answers to pass:16
Passing score:80%
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