CIT Cable and Wire Harness Assembly Requirements 2

Question 1

According to IPC/WHMA-A-620, what is the minimum bend radius for a coaxial cable in a fixed application?

Accepted Answer

6 times the cable outer diameter

Answer

IPC/WHMA-A-620 specifies a minimum bend radius of 6 times the outer diameter for coaxial cables in fixed applications to prevent signal degradation.

Question 2

When installing a wire tie (cable tie) on a harness, which condition constitutes a Class 3 defect?

Accepted Answer

Tie installed at a conductor splice location

Answer

Installing a wire tie directly over a conductor splice is a defect in all classes because it can damage insulation and create stress on the connection.

Question 3

What does the term 'breakout' refer to in cable and wire harness assemblies?

Accepted Answer

A point where wires exit the main harness trunk to a branch

Answer

A breakout is the point in a wire harness where individual wires or groups of wires branch off from the main bundle.

Question 4

Which IPC/WHMA-A-620 class requires the most stringent workmanship standards for harness assemblies?

Accepted Answer

Class 3

Answer

Class 3 represents High Performance/Reliability electronics where continued performance is critical, such as life-support or military applications.

Question 5

When using heat-shrink tubing on a wire harness, what is the correct sequence of operations?

Accepted Answer

Slide tubing on, terminate, then apply heat to shrink

Answer

Heat-shrink tubing must be slid onto the wire before termination because it cannot pass over a terminated connector, then heat is applied after termination.

(CIT) Certified IPC Trainer Practice Test

(CIT) Certified IPC Trainer Practice Test

CIT Cable and Wire Harness Assembly Requirements 2