433A Rigging and Hoisting 2

Question 1

When inspecting wire rope, which condition requires immediate removal from service per CSA standards?

Accepted Answer

Six randomly distributed broken wires in one lay length

Answer

Minor surface rust with no visible pitting

Answer

Slight surface dryness requiring lubrication

Answer

A slight kink that straightens easily by hand

Question 2

What does the D/d ratio describe in wire rope and sheave applications?

Accepted Answer

The ratio of sheave or drum diameter to wire rope diameter

Answer

The ratio of dead load to dynamic load

Answer

The ratio of design load to rated datum load

Answer

The ratio of deflection to rope displacement

Question 3

A bolt-type shackle pin must always be:

Accepted Answer

Fully threaded in and secured with a cotter pin or moused with wire

Answer

Greased and left finger-tight to permit load rotation

Answer

Fully threaded in then backed off one-quarter turn

Answer

Replaced with any bolt of the same diameter if the original is unavailable

Question 4

How is a 'critical lift' defined in most Canadian provincial safety regulations?

Accepted Answer

A lift where failure could cause serious injury, death, or major property damage, typically requiring a written lift plan

Answer

Any lift involving a load exceeding 1,000 kg

Answer

Any lift performed within 3 metres of energized electrical equipment

Answer

A lift requiring more than two rigging slings

Question 5

What is 'two-blocking' in overhead crane operations?

Accepted Answer

The hook block rising until it contacts the upper head block, creating a sudden shock load

Answer

Using two separate crane hooks for a single lift

Answer

Using two wire rope slings as the primary rigging

Answer

Blocking a load from both sides using timber cribbing

Question 6

Which sling type is most suitable for lifting loads with sharp edges without using edge protection?

Accepted Answer

Alloy chain sling

Answer

Synthetic web sling

Answer

Wire rope sling

Answer

Round synthetic sling

Question 7

Before any lift, what is the single most critical pre-lift check a millwright rigger must perform?

Accepted Answer

Inspecting all rigging equipment for defects and confirming the load weight

Answer

Confirming the weather forecast shows wind speeds under 40 km/h

Answer

Verifying the crane's fuel or hydraulic fluid level

Answer

Ensuring the crane operator holds a valid provincial operator certificate