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All shut-off valves should be open.
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The rear shut-off valves should be open.
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All shut-off valves should be in the open position, except the rear shut-off valves.
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No shut-off valves should be open.
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West Virginia CDL Permit Test - Combination
(From the 2021 West Virginia CDL driver handbook)
| 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's 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 have two minutes per question to correctly answer a minimum of 16 questions. The Combination test is not a replacement for the Double/Triple endorsement test.
Passing grade —
4 or fewer errors
advertising
1.
During a trip, which shut-off valves should be open?
2.
While inspecting a coupling, you should go under the trailer and:
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Detach the jaws from around the kingpin.
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Make sure the locking lever is in the "emergency" position.
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Remove the safety latch.
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Look into the back of the fifth wheel.
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3.
The emergency air line:
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Is controlled by the foot brake.
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Is connected to the relay valves.
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Supplies air to the trailer air tanks.
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Prevents skids.
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4.
Look for matching colors when coupling glad hands. Service lines are often:
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Green.
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Orange.
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Red.
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Blue.
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5.
Pull out the trailer air supply control to test:
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The parking brake.
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The trailer emergency brakes.
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The trailer service brakes.
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The landing gear.
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6.
Failure to keep the fifth wheel plate properly greased could:
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Cause the trailer to disconnect.
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Cause steering problems.
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Cause braking problems.
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Affect the lights.
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7.
Trailers manufactured after ____ must be equipped with Anti-Lock Braking Systems (ABS).
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1943
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1998
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2009
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2015
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