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Drivers who want to drive combination vehicles must pass the combination vehicles test. The Georgia 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 Georgia CDL Manual. Take this practice test now to prepare for the actual GA CDL combination test!
1.
Which of the following is true about the trailer hand valve?
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The trailer hand valve works the trailer brakes.
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It should be used only to test the trailer brakes.
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If used in driving it could cause the trailer to skid.
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All of the above.
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2.
_________ rigs are much more likely to roll over in an accident than _________ rigs.
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Empty ; fully loaded
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Empty ; overloaded
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Fully loaded ; empty
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Fully loaded ; overloaded
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3.
In combination vehicles with air brakes, the trailer air supply control:
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is used to control the tractor protection valve.
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is used to keep the trailer behind the tractor.
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supplies air to the trailer air tanks.
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is a coupling devices used to connect the service and emergency air-lines from the tractor to the trailer.
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4.
Which of the following is NOT a good rule for using turn signals?
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Put your turn signal on after the turn.
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Signal continuously until you have completed the turn.
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Signal well before you turn.
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Cancel your signal after you have turned.
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5.
Which of the following is not a reason for covering cargo?
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To protect people from spilled cargo
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To prevent other drivers from looking at the cargo
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To protect the cargo from weather
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All of the above.
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6.
Which of the following is NOT part of the procedure to stop a trailer skid?
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Using the trailer hand brake to get traction back
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Not using the hand brake
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Recognizing the skid
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Releasing the brakes
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7.
At passive railroad crossings, even if there are active railroad signals that indicate the tracks are clear, you must _________ to be sure it is safe to proceed.
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go, look and put the transmission in neutral
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stop, look, and listen
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listen, look and stop
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go, stop and listen
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8.
Most heavy trucks with manual transmissions require ____ to change gears.
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triple clutching
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single clutching
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double clutching
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None of the above.
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9.
If you will be transporting hazardous materials that require placards, you must:
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obtain a hazardous materials endorsement.
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obtain a special transit permit.
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ask permission of the local transportation agency.
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transport the materials at night only.
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10.
Which of the following is most likely to roll over?
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The front trailer of a double
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The rear trailer of a double
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The rear trailer of a triple
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The middle trailer of a triple
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