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California CDL Permit Test - Combination

Number of questions: 20
Passing score: 17
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 California Commercial Driver Handbook. 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 17 questions to pass. The Combination test is not a replacement for the Double/Triple endorsement test.
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Passing grade —
3 or fewer errors
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1.
After completing a pre-trip inspection, you should ensure that the:
Service line valve is closed.
Trailer hand brake is applied.
Emergency line valve is open.
2.
How much space should be between the upper and lower fifth wheel?
About five inches of space
A maximum of two inches of space
No space
3.
A loss of air pressure in the emergency line will cause:
The suspension springs to extend.
The tractor protection valve to open.
The emergency brakes to activate.
4.
In a sudden turn, the ____ trailer is the most likely to turn over.
Front
Last
Middle
5.
When connecting a converter dolly to a second trailer, the trailer height should be ____ the center of the fifth wheel.
Level with
Slightly higher than
Slightly lower than
6.
An air supply control lever should be in its "normal" position when you are:
Changing a tire.
Applying the trailer emergency brakes.
Pulling a trailer.
7.
All trailers made after ____ must be equipped with Anti-Lock Braking Systems (ABS).
1943
1998
2009
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