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Mississippi 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.
If a parked trailer does not have spring brakes, you should keep the trailer from moving by:
Using the air brakes.
Using wheel chocks.
Parking near a wall.
Parking on a slight incline.
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.
Rollovers happen when:
Drivers turn too quickly.
Drivers turn too slowly.
It is raining.
4.
The trailer hand valve should be used:
To test the trailer brakes.
To check the connection between the trailer and tractor.
To accelerate.
5.
What can the “crack-the-whip” effect do?
Turn over trailers.
Make loud noises.
Make trucks accelerate.
Make trucks decelerate.
6.
A combination vehicle has:
One air line.
Two air lines.
Three air lines.
Four air lines.
7.
Combination vehicles need extra space on the road because they:
Drive more slowly than other commercial motor vehicles.
Are heavier than other commercial motor vehicles.
Need more space to turn and stop than other commercial motor vehicles.
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