433A Rigging and Hoisting 3

Question 1

What is a spreader bar (spreader beam) primarily used for in rigging?

Accepted Answer

To maintain sling leg separation and keep legs vertical, reducing compressive forces on the load

Answer

To increase the crane hook's WLL for heavy lifts

Answer

To connect multiple loads to a single crane hook simultaneously

Answer

To measure the horizontal distance between two lift points

Question 2

What is the standard CSA/ASME hand signal for 'hoist' given to a crane operator?

Accepted Answer

Index finger pointing upward with a circular motion of the hand and forearm

Answer

Both arms raised horizontally with palms facing up

Answer

One arm extended horizontally then swept downward

Answer

Hand held flat, palm down, moving slowly side to side

Question 3

What is the maximum fleet angle generally accepted for wire rope spooling onto a hoist drum?

Accepted Answer

2° 30'

Answer

1° 30'

Answer

4° 00'

Answer

6° 00'

Question 4

When rigging a load with an off-centre (eccentric) centre of gravity, where must the crane hook be positioned?

Accepted Answer

Directly above the load's centre of gravity

Answer

At the geometric centre of the load's footprint

Answer

At the heavier end of the load to counterbalance it

Answer

At equal distance from each sling attachment point regardless of weight distribution

Question 5

What does a proof load test on rigging hardware verify?

Accepted Answer

The hardware can withstand a load greater than its WLL without permanent deformation

Answer

The hardware can sustain its WLL for a minimum of 24 continuous hours

Answer

The hardware can operate at WLL without lubrication for 8 hours

Answer

The hardware meets minimum weight tolerances for its size class

Question 6

How should chain slings be stored when not in use?

Accepted Answer

Hung on a dedicated rack or peg to prevent kinking, tangling, and corrosion

Answer

Coiled on the floor in a dry corner of the shop

Answer

Submerged in an oil bath to prevent rust

Answer

Stored in sealed wooden boxes with master links removed

Question 7

What is the function of a load cell when used in a rigging operation?

Accepted Answer

To measure and display the actual tension force in the rigging during the lift

Answer

To act as a protective buffer between the sling and sharp load edges

Answer

To automatically stop the crane hoist if the rated load is exceeded

Answer

To connect two different types of rigging hardware of incompatible sizes