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Turn on the air supply.
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Apply the trailer emergency brakes.
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Prevent a skid.
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Accelerate the vehicle.
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Utah CDL Permit Test - Combination
(From the 2021 Utah CDL driver handbook)
| Number of questions: | 30 |
| Passing score: | 25 |
Directions:
All applicants who are applying for a Class A CDL should be prepared to take the Combination test. This test covers information found in Section 6 of the Commercial Driver License Manual. Section 6 provides the information needed to safely operate tractor-trailers, doubles, triples, and straight trucks with trailers. The test is made up of 30 multiple-choice questions, and applicants will need to correctly answer a minimum of 24 questions to pass. The Combination test is not a replacement for the Double/Triple endorsement test.
Passing grade —
5 or fewer errors
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1.
An air supply control in its "emergency" position will:
2.
To prevent a rollover, a driver should:
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Keep cargo low.
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Place cargo high.
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Keep cargo loose.
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Turn quickly.
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3.
Rollovers happen when:
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Drivers turn too quickly.
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Drivers turn too slowly.
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It is raining.
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4.
What does an Anti-Lock Braking System (ABS) do?
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It allows a vehicle's wheels to lock up.
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It prevents a vehicle's wheels from locking up.
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It makes turning a vehicle easier.
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5.
Before a drive, ensure that air flows to all trailers by:
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Opening the rear shut-off valves and listening for escaping air.
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Closing the rear shut-off valves and listening for escaping air.
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Disconnecting air supply lines and listening for escaping air.
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Rolling each trailer down a hill and testing the brakes.
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6.
What is off-tracking?
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When a vehicle’s front wheels follow a different path than its rear wheels
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When a vehicle's wheels all follow the exact same path
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When a load shifts during a turn
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When a vehicle's wheels run over a curb during a turn
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7.
The emergency air line supplies air to the:
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Relay valves.
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Trailer air tanks.
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Signal line.
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8.
Combination vehicles:
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Often have taller trailers than single commercial vehicles.
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Are usually lighter than single commercial vehicles.
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Require more skill to drive than single commercial vehicles.
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