Rigging, Hoisting & Lifting — Steamfitter/Pipefitter (307A) Practice Questions

Free Rigging, Hoisting & Lifting practice questions

1. 1.What is the WLL formula for wire rope (6×19)?

   • A.D × 10
   • B.D² × 8 (diameter in inches squared × 8 = tons)✓
   • C.D × 5
   • D.D² × 4

   Why: WLL = D² × 8 for 6×19 wire rope. Example: 1/2" rope = (0.5)² × 8 = 2 tons. This formula may be provided on the Red Seal exam.

2. 2.When rigging a pipe to maintain level during a lift, the sling attachment points must be:

   • A.At the ends
   • B.Positioned so the centre of gravity is between and below the attachment points✓
   • C.Anywhere convenient
   • D.At one end only

   Why: The centre of gravity (CG) must be directly below the hook/crane attachment. If CG is off-centre, the pipe tilts. Use adjustable slings or a spreader beam for balance.

3. 3.A come-along (lever hoist) must never be used to:

   • A.Pull pipe
   • B.Lift personnel or as a permanent support — it's for temporary rigging and pulling only✓
   • C.Move equipment
   • D.Position pipe

   Why: Come-alongs are for temporary pulling/positioning only. Never for lifting people, not for permanent supports, and never loaded beyond their rated capacity.

4. 4.A pipe roller allows:

   • A.Nothing special
   • B.The pipe to move axially during thermal expansion while supporting its weight✓
   • C.Pipe to spin freely
   • D.Only vertical movement

   Why: Pipe rollers support the pipe's dead weight while allowing it to slide axially as it expands and contracts with temperature changes. Critical for long straight runs of steam piping.

5. 5.Shackle pin orientation when rigging should be:

   • A.Any direction
   • B.Pin loaded along its axis (not in the direction that could unscrew it)✓
   • C.Pin pointing down always
   • D.Doesn't matter

   Why: Orient the shackle pin so the load doesn't tend to unscrew it. The pin should be loaded in shear, not in a direction that could roll it open. Bolt-type shackles with cotter pins are more secure.

6. 6.Rigging hardware must be inspected:

   • A.Once a year
   • B.Before each use — check for cracks, deformation, corrosion, and proper rating✓
   • C.Only when new
   • D.Never

   Why: Pre-use inspection: check slings for cuts/wear, shackles for pin straightness, hooks for throat opening, all hardware for damage/deformation. Remove damaged equipment immediately.

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