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RIGGING Flashcards

(73 cards)

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1
Q

What does “IWRC” stand for?

A

Independent wire rope core

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2
Q

What is the most common sized rope used on jobs?

A

Grade 110/120 improved plow

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3
Q

What are the 2 classifications of how rope I layed?

A

Regular lay and lang lay

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4
Q

In lang lay rope, which directions are the strands layed?

A

The same direction

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5
Q

How often should you inspect wire rope if its used regularly?

A

Every time before each use/daily

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6
Q

How is wire rope measured?

A

By measuring across its crowns

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7
Q

What causes strand crushing?

A

A condition of too many layers being wrapped around a drum.

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8
Q

Approximately how many times the diameter do you measure to seize wire rope?

A

3 times the diameter

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9
Q

How do you figure the ultimate breaking strength?

A

Diameter squared times 45 (D2x45)

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10
Q

How do you figure the safe working load/working load limit?

A

Take your ultimate breaking strength and divide it by 5, or consider it a 5:1 safety factor

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11
Q

What is the safety factor for when you’re picking up person’s in a basket?
What is the safety factor for an elevator?

A

10:1
20:1

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12
Q

What are the 5 sling tag requirements?

A

-name of manufacturer
-diameter of size of sling
-type of material used
-rated load for a given type of hitch
-lift angle upon which load rating is based

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13
Q

When using four legs on a pick, how many are calculated for the pick?

A

only 3 legs

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14
Q

How do you figure out how many wire rope clips are needed to make an eye on the end?

A

Dx3+1

Example is
3/4”x3+1=4 clips

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15
Q

How do you figure out spacing on wire rope clips?

A

Dx6
example 1”x6=6 inches apart

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16
Q

How are shackles “sized”?

A

By the “Bow” section. Not by the pin diameter.

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17
Q

How much larger is the pic than the shackle on a 1/2” shackle?

A

1/8” larger

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18
Q

The bottom of the groove should have an arc of support of at least ___ to ___

A

120 degrees to 150 degrees

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19
Q

What is the mechanical advantage of a 4 part block and tackles system?

A

4:1

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20
Q

What distance out from a groove drum should you attach your first snatch block?

A

30 degrees
Or a 30:1 ratio

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21
Q

All hoists require what on their identification plate? (8 things)

A

-load rating
-drum size
-barrel diameter
-barrel length
-flange diameter
-rope size
-rope speed
-rated power supply

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22
Q

A sheet bend is used for tying 2 ropes of ____ ____ together.

A

Unequal diameter

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23
Q

A lift plan is needed for a lift classified as a ____ ____

A

Critical lift

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24
Q

What is the first step in any lift plan?

A

Finding weight of load

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25
All those involved in a lift plan may be required to have some type of what?
Certifications
26
What is wire rope seizing?
A method or binding the end of a wire rope.
27
True or False The pin of a shackle is usually placed on a hook and the body is usually placed on an anchor part.
True
28
True or false. Any capacity calculations with wire rope passing over a sheave should be reduced by a minimum of 5%
True
29
A four part block and tackle with the lead line will travel ___ feet for every ___ foot the load is lifted.
4, 1
30
On a 1” wide smooth drum tugger, where should you attach your first snatch block
20’
31
The operator should only respond to the designated signal or person, however anyone can give a __ __ __
Stop command signal
32
Which type of sling is appropriate for high temperatures?
Chain
33
Which of the following synthetic ropes have the lowest safe working load rating?
Polypropylene
34
How would the SWL of a 3 or 4 part brindle sling be calculated?
Usually the same as a two-part sling
35
What is the safety factor of new wire rope used for general rigging?
Depends on the applications.
36
Health and safety on the job is:
The number one priority.
37
When using 2 modified basket hitches in a single hook, the maximum angle separating the two slings must never exceed:
90 degrees
38
What do the terms “regular lay” and “lang lay” refer to?
Direction the wires are wound, relative to the direction the strands are wound.
39
The definition of a regular lay wire rope is:
The wires that make up the strand twist clockwise and the strand is twisted counterclockwise.
40
The minimum wraps to be left on any drum according to Alberta Occupational Health and Safety regulations is
5
41
A true basket hitch, with a wire rope sling, has twice the capacity of a vertical hitch if the D/d ratio is ________ and if the wire rope is vertical.
From 20:1 to 40:1
42
Which of the following would be considered coarse laid rope: 6x37, 6x7, 6x9?
6x7
43
Fleet angle for a smooth drum is
1.5 degrees
44
When cribbing a heavy load, what is the rule of thumb for the maximum height if cribbing? (Cribbing dunnage all set to the same length)
The height should not be greater than the length of the dunnage
45
What is the rule of thumb for placing the first snatch block away from an air tugger?
15 drum widths
46
Which style of block is used to achieve a change in direction without having to reeve(pass) the wire rope through the block?
Snatch block
47
The maximum number of parts of line that may be used when receiving fiber rope before friction loss is greater than mechanical advantage is:
8
48
When inspecting any type of block used for rigging purposes, we need to check: 4 items
-pins and axles -rope groove -bushings or bearings -end fittings
49
Prior to anchoring an air tugger to a structural column:
Ensure an engineer has approved the connection
50
When spooling wire off the top of a drum, if the anchor point is on the left and you are using right regular lay wire rope, how should the wire rope be wound on the drum?
Over wound from the left side of the drum.
51
Which type of eye bolt should be used if there is any possibility of angular load
Shoulder type
52
A shackle is sized by the ___
Bow
53
The included angle on a shackle bow using 2 slings should never exceed
90 degrees
54
Shoulder-less eyebolts should only be used for
Vertical lifts
55
There are 2 types of wire rope clips used in construction
Fist grip and saddle types
56
“Chain falls” and “come-a-longs” safety factor is
4 to1
57
When operating a crane around new construction, which of the following conditions could be dangerous?
Outrigger pads set within the 45 degree line from the base of a trench or excavation.
58
Boom deflection and pendant line stretch will increase
Long radius
59
A sudden start or stop produces a:
Shock load
60
Excluding site policy, what percent of a crane’s rated capacity is classed as a critical lift?
75%
61
Every boom section on a conventional with lattice boom must be clearly identified with which of the following?
-length -serial # -weight -date of inspection -model #
62
A spool is rigged up to cut out of a rack. As the cut is finished, the load drops suddenly, causing a condition known as:
Shock loading
63
Basic type of boom truck
Articulating boom
64
If the hook does not hang dead center from an extended boom on a boom truck, the problem would likely be
Truck not level
65
To determine the total load weight for a lift, it his necessary to include
Any weight below the centerline of the top sheave.
66
When rigging up a turntable mounted hoisting device, what is the most important thing to consider during setup.
Level the machine
67
What is initially required to gain control of the load?
Determine the center of gravity
68
How is a stowed jib kept in place?
Pins with retaining clips
69
Tower cranes should not be operated when wind speeds reach
20-30mph
70
Tower cranes fastened to the outside of a building need to be secured every
4 floors
71
Limit switch operation in EOT crane should be checked
At the beginning of each shift
72
Three main objectives of successful rigging are
Safety, communication, and control
73
Every removable section of an EOT crane must be clearly identified with which of the following?
-weight -serial # -date of inspections -model #

RIGGING (1 decks)

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