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Nebraska CDL Permit Test - Combination

Number of questions: 25
Passing score: 20
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 Nebraska 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 25 multiple-choice questions, and applicants will need to correctly answer a minimum of 20 questions to pass. The Combination test is not a replacement for the Double/Triple endorsement test.
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5 or fewer errors
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1.
Using the trailer hand brake while experiencing a trailer jackknife will:
Stop the skid.
Straighten the trailer.
Increase traction.
Continue the skid.
2.
What does the trailer air supply control look like?
It is a square blue knob.
It is a triangular yellow knob.
It is an eight-sided red knob.
It is a circular orange knob.
3.
The best way to notice if a trailer has begun to skid is to:
Ask another driver.
Use your mirrors to determine if the trailer has left the lane.
Look at the skid sensor.
Feel the tractor move.
4.
When traveling more slowly than 40 mph, maintain at least ____ of following distance per every 10 feet of your vehicle.
One second
Two seconds
Three seconds
Four seconds
5.
The ____ trailer is the most likely to turn over if a driver takes a turn too quickly.
Front
Last
Middle
6.
After finishing a pre-trip inspection, you should:
Leave the rear shut-off valves open.
Remove the service line valve.
Close the emergency line valve.
Leave the emergency line valve open.
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