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Kentucky CDL Permit Test - Combination

Number of questions: 20
Passing score: 16
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 20 multiple-choice questions, and applicants will need to correctly answer a minimum of 16 questions to pass. The Combination test is not a replacement for the Double/Triple endorsement test.
You have made error so far
Passing grade —
4 or fewer errors
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1.
When driving while pulling trailers, you should:
Make sudden turns with the steering wheel.
Avoid making sudden moves.
Push the accelerator to the floor when starting from a stop.
2.
If you are backing and the trailer begins to drift off-course, the driver should:
Return the steering wheel to the 12 o’clock position.
Turn the top of the steering wheel in the direction of the drift.
Turn the top of the steering wheel in the direction opposite of the drift.
3.
What is the tractor protection valve?
A valve that keeps air in the brake system should a bad leak occur
A valve that prevents the trailer from being accidentally released
A valve that prevents the vehicle from going too fast
4.
The trailer hand valve:
Should always be used for parking.
Should only be used for parking on a downgrade.
Should never be used for parking.
5.
The tractor protection valve:
Ensures that oil adequately lubricates the engine.
Protects the tractor from exceeding a set speed.
Keeps air in the truck braking system if the trailer develops a leak.
6.
Fully-loaded rigs:
Are less likely to roll over than empty rigs.
Are more likely to roll over than empty rigs.
Are just as likely to roll over as empty rigs.
7.
The trailer hand valve should be used:
To test the trailer brakes.
To check the connection between the trailer and tractor.
To accelerate.
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