Pipefitter Rigging, Hangers, and Supports 3

Question 1

When inspecting a wire rope sling before a lift, which defect requires the sling to be immediately removed from service?

Accepted Answer

Six randomly distributed broken wires in one rope lay

Answer

Six or more randomly distributed broken wires in one rope lay is a disqualifying defect per ASME B30.9.

Question 2

A spring hanger is used instead of a rigid support when:

Accepted Answer

Thermal expansion causes the pipe to move vertically during operation

Answer

Spring hangers accommodate vertical pipe movement caused by thermal expansion while maintaining a controlled load.

Question 3

What is the purpose of a pipe anchor (fixed point) in a piping system?

Accepted Answer

To prevent all movement and absorb forces at a specific location

Answer

An anchor restrains the pipe against all movement and absorbs thermal, pressure, and dynamic forces at that point.

Question 4

Which rigging configuration provides the greatest mechanical advantage when using a block and tackle system?

Accepted Answer

Four-part line (double block and tackle)

Answer

A four-part line doubles the mechanical advantage compared to a two-part line, allowing a lighter applied force to lift heavier loads.

Question 5

What does the term 'SWL' stamped on rigging hardware indicate?

Accepted Answer

Safe Working Load

Answer

SWL (Safe Working Load) is the maximum load a piece of rigging hardware is rated to carry under normal working conditions.

Certified Pipefitter Practice Test