Pipefitter Rigging, Hangers, and Supports 5

Question 1

Pipe shoes (pipe saddles) are used on insulated lines primarily to:

Accepted Answer

Transfer load to the support steel without compressing or damaging the insulation

Answer

Pipe shoes extend below the insulation to rest on the support, keeping the insulation intact and continuous.

Question 2

The rated capacity of a synthetic web sling is reduced most significantly when the sling is used in a:

Accepted Answer

Choker hitch

Answer

A choker hitch reduces a synthetic sling's rated capacity to approximately 75–80% of its vertical hitch rating due to the choke point stress.

Question 3

When multiple pipe hangers are installed on a beam, the maximum spacing between supports is determined primarily by:

Accepted Answer

Pipe material, diameter, operating temperature, and fluid weight

Answer

Support spacing is calculated from allowable pipe sag (deflection) based on pipe size, wall thickness, material, and the combined weight of pipe, fluid, and insulation.

Question 4

A rigger observes that a load is drifting to one side during a crane lift. The correct action is to:

Accepted Answer

Lower the load and rerig it correctly

Answer

A load drifting sideways indicates the rigging attachment point is not directly above the load's center of gravity; the correct response is to lower and rerig.

Question 5

Variable spring hangers must be set to their 'cold' (installation) position before hydrostatic testing because:

Accepted Answer

Water weight during testing is much greater than operating fluid weight

Answer

Water is significantly heavier than most process fluids, so springs must be set for the cold/empty load to avoid overloading during the water-filled test.

Certified Pipefitter Practice Test

Certified Pipefitter Practice Test

Pipefitter Rigging, Hangers, and Supports 5