Deck 17: Rigging

Question 1

Explain the disadvantages of synthetic slings in relation to wire ropes.

Answer 1

They are damaged by exposure to temperatures over 180° F, they are susceptible to cuts and abrasions, and many will deteriorate if left exposed to sunlight for long periods of time.

Question 2

__________ are used with wire ropes and synthetic slings to protect the sling from sharp corners on the load.

Answer 2

Wear pads

Question 3

The greatest use of cranes and rigging in residential construction is in lifting __________ into place.

A) roof trusses
B) air conditioning units
C) stud wall sections
D) floor joists

Answer 3

A

Question 4

OSHA requires that all chain slings be inspected by a trained "competent person" at least once a __________.

A) day
B) week
C) month
D) year

Question 5

The lay of a rope affects its operational characteristics. __________ lay is more fatigue resistant and abrasion resistant.

A) Regular
B) Parallel
C) Perpendicular
D) Lang

Question 6

Explain the advantages synthetic slings have over wire ropes.

Question 7

All synthetic slings have __________ embedded in the material that when exposed mean the sling must be taken out of service.

Question 8

If blocking is needed to support the load at its new location, it should be prepared __________.

A) when the load is being lowered in place
B) when the load is being moved
C) when the load is being raised
D) before the load is lifted

Question 9

A light line attached to a load to control it by hand is called a(n) __________.

Question 10

A(n) __________ is used inside the eye of a wire rope sling to decrease wear and to protect the wire rope from kinking.

Question 11

The crane operator receives instructions by radio or hand signals only from the __________.

Question 12

The amount of weight the manufacturer has specified as the maximum load on a sling is called the rated __________

Question 13

Which of the following is not a common type of core used in wire ropes?

A) strand core
B) fiberglass core
C) independent wire core
D) fiber core

Question 14

Which of the following is not required to be on a sling's manufacturer's tag?

A) rated capacity
B) type of material sling is made of
C) tag line limitations
D) rated capacity of the sling

Question 15

The length along the rope that a strand makes one complete spiral around the rope core is called the __________.

Question 16

A __________ hook has an eye at a right angle to the plane of the hook.

A) choker
B) reverse-eye
C) grab
D) foundry

Question 17

When working with wire ropes, it is the __________ responsibility to obtain and follow the proper inspection criteria for each application inspected.

A) employee's
B) foreman's
C) inspector's
D) superintendent's

Question 18

A __________ hook has a narrow throat so that it will grab a link in the chain and not slip.

A) choker
B) reverse-eye
C) grab
D) foundry

Question 19

With wire ropes, a __________ break occurs when a wire breaks under a tensile load exceeding its strength.

A) cup and cone
B) fatigue
C) strand nicking
D) bird cage

Question 20

With wire ropes, a __________ fault is caused by the sudden release of tension and the resulting rebound of the rope.

A) cup and cone
B) fatigue
C) strand nicking
D) birdcage

Question 21

Explain why a sling should not be used if the manufacturer's tag is not readable or is missing.