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Drivers who want to drive combination vehicles must pass the combination vehicles test. The California 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 California CDL Manual. Take this practice test now to prepare for the actual CA CDL combination test!
1.
If the drive wheels start to skid:
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use the brakes to slow down.
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push in the clutch to let them turn freely.
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accelerate slightly to regain control.
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2.
Transporting hanging meat requires special attention. Why?
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Because you have to drive fast to get it delivered fresh.
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Because hanging meat can be an unstable load with a high center of gravity.
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Because refrigerated trucks have less traction.
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3.
When driving on slippery surfaces, you should:
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not pass slower vehicles unless necessary.
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make turns as quickly as possible.
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change lanes often.
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4.
Which of the following is NOT part of testing the tractor protection valve?
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Charging the trailer air brake system.
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Pulling forward slowly, then applying the trailer brakes.
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Stepping on and off the brake pedal several times to reduce the air pressure in the tanks.
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5.
When inspecting the cargo, make sure it is:
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secured properly for the first 50 miles after beginning a trip.
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piled up.
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not overloaded.
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6.
As part of the final air brake check, you should:
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Check air compressor governor cut-in and cut-out pressure.
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Test air leakage rate.
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All of the above.
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7.
What is the minimum tread depth for tires other than front tires?
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2/32 inch
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4/32 inch
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8/32 inch
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8.
If driving a new vehicle, you should familiarize yourself with the controls and equipment:
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as you drive.
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before you start driving.
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within the first 50 miles.
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9.
Headlights:
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can blind other drivers.
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must be turned on a half hour before sunset to a half hour after sunrise.
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should not be used when driving at night.
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10.
When more cargo is piled up in a truck, the center of gravity moves:
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higher up from the road.
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to the left side of the truck.
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closer to the ground.
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