Question

When checking the coupling system, you need to:

A. check the fifth wheel for cracks, breaks, security, and grease.
B. check the kingpin for excessive cracks, bending, or wear.
C. check the differential for loose wire connections.
D. A & B.

Answer 1

The correct procedure when checking the coupling system is to check both the fifth wheel and the kingpin for any signs of damage or excessive wear. correct answer is D: A & B.

Step-by-step explanation:

When checking the coupling system of a truck, you should:

• Check the fifth wheel for cracks, breaks, security, and grease to ensure that it can securely hold the trailer.
• Check the kingpin for excessive cracks, bending, or wear as it is a critical component that connects the trailer to the truck.

The differential is not part of the coupling system, so it is not something you would check when inspecting the coupling system. Therefore, the correct answer is D: A & B.