Lifting Rigging And Housting

Question 0

Wire ropes are made of what type of steel?

Answer 0

Carbon or stainless laid around a wire rope core.

Question 1

Breaking strength is

Answer 1

The minimum load required to break two components

Question 2

Wire ropes are manufactured in what three configurations.?

Answer 2

Eye and eye
Endless
Grommet sling

Question 3

A better highly recommended practice when using eye slings Is to insert what?

Answer 3

Insert a thimble in the eye as it is manufactured

Question 4

With a thimble and clip properly applied the eye is capable of developing what % for strength

Answer 4

80%

Question 5

As a general rule there are several safety factors when using wire rope for lifting applications. These factors include:

Answer 5

5: 1 safety factor for general lifting and hoisting.
10: 1 safety for lifting and transporting workers
20: 1 safety factor when used for public elevators

Question 6

Synthetic fibre slings are good for hoisting because ??

Answer 6

Thy don’t mar

Deface or mark surfaces

Question 7

Synthetic slings are what? when it comes to shock loads

Answer 7

Highly elastic

Question 8

Chain slings are made of what type of material

Answer 8

Alloy steel

Question 9

What is minimum ultimate load when used for chain lifting applications ??

Answer 9

Minimum ultimate load refers to the minimum load that will break a new chain.

Chain size.        Working load limit
1/4" chain -          3500lb
5/16.                     5400lb
3/8.                        7100lb
1/2.                       12000lb

Question 10

Who is responsible for the inspection of the rigging equipment prior to each shift.

Answer 10

Your employer

When you inspect it you must also decide weather it is safe or unsafe

Question 11

How much can wire rope be worn until it must be replaced ?

Answer 11

1/3 or more of it’s original diameter

Question 12

What is the percentage of a chain sling that you must use, to determine if it must be taken out of service.

Answer 12

15% - discard if the wear exceeds 15 percent of the dia of the link

Question 13

TQ - What is your optimal sling angle ??

Answer 13

60*

Question 14

TQ - What is your critical angle?

Answer 14

30*

Question 15

TQ - if your lifting a load on an angle it does what?

Answer 15

Puts undo stress on the beam

Question 16

The SWL for shoulder and shoulder less eyebolts is the same for a vertical lift

T

F

Answer 16

True

Question 17

What two types of shackles are most common in rigging?

Answer 17

Anchor and bow type

Question 18

All hooks should be made out of what type of material?

Answer 18

Forged alloy steel

Question 19

What two hooks don’t have safely latches

Answer 19

Grab chains and sorting hooks