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RIGGING > RIGGING > Flashcards

RIGGING Flashcards

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
Q

All those involved in a lift plan may be required to have some type of what?

A

Certifications

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26
Q

What is wire rope seizing?

A

A method or binding the end of a wire rope.

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27
Q

True or False

The pin of a shackle is usually placed on a hook and the body is usually placed on an anchor part.

A

True

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28
Q

True or false.

Any capacity calculations with wire rope passing over a sheave should be reduced by a minimum of 5%

A

True

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29
Q

A four part block and tackle with the lead line will travel ___ feet for every ___ foot the load is lifted.

A

4, 1

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30
Q

On a 1” wide smooth drum tugger, where should you attach your first snatch block

A

20’

31
Q

The operator should only respond to the designated signal or person, however anyone can give a __ __ __

A

Stop command signal

32
Q

Which type of sling is appropriate for high temperatures?

A

Chain

33
Q

Which of the following synthetic ropes have the lowest safe working load rating?

A

Polypropylene

34
Q

How would the SWL of a 3 or 4 part brindle sling be calculated?

A

Usually the same as a two-part sling

35
Q

What is the safety factor of new wire rope used for general rigging?

A

Depends on the applications.

36
Q

Health and safety on the job is:

A

The number one priority.

37
Q

When using 2 modified basket hitches in a single hook, the maximum angle separating the two slings must never exceed:

A

90 degrees

38
Q

What do the terms “regular lay” and “lang lay” refer to?

A

Direction the wires are wound, relative to the direction the strands are wound.

39
Q

The definition of a regular lay wire rope is:

A

The wires that make up the strand twist clockwise and the strand is twisted counterclockwise.

40
Q

The minimum wraps to be left on any drum according to Alberta Occupational Health and Safety regulations is

A

5

41
Q

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.

A

From 20:1 to 40:1

42
Q

Which of the following would be considered coarse laid rope: 6x37, 6x7, 6x9?

A

6x7

43
Q

Fleet angle for a smooth drum is

A

1.5 degrees

44
Q

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)

A

The height should not be greater than the length of the dunnage

45
Q

What is the rule of thumb for placing the first snatch block away from an air tugger?

A

15 drum widths

46
Q

Which style of block is used to achieve a change in direction without having to reeve(pass) the wire rope through the block?

A

Snatch block

47
Q

The maximum number of parts of line that may be used when receiving fiber rope before friction loss is greater than mechanical advantage is:

A

8

48
Q

When inspecting any type of block used for rigging purposes, we need to check: 4 items

A

-pins and axles
-rope groove
-bushings or bearings
-end fittings

49
Q

Prior to anchoring an air tugger to a structural column:

A

Ensure an engineer has approved the connection

50
Q

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?

A

Over wound from the left side of the drum.

51
Q

Which type of eye bolt should be used if there is any possibility of angular load

A

Shoulder type

52
Q

A shackle is sized by the ___

A

Bow

53
Q

The included angle on a shackle bow using 2 slings should never exceed

A

90 degrees

54
Q

Shoulder-less eyebolts should only be used for

A

Vertical lifts

55
Q

There are 2 types of wire rope clips used in construction

A

Fist grip and saddle types

56
Q

“Chain falls” and “come-a-longs” safety factor is

A

4 to1

57
Q

When operating a crane around new construction, which of the following conditions could be dangerous?

A

Outrigger pads set within the 45 degree line from the base of a trench or excavation.

58
Q

Boom deflection and pendant line stretch will increase

A

Long radius

59
Q

A sudden start or stop produces a:

A

Shock load

60
Q

Excluding site policy, what percent of a crane’s rated capacity is classed as a critical lift?

A

75%

61
Q

Every boom section on a conventional with lattice boom must be clearly identified with which of the following?

A

-length
-serial #
-weight
-date of inspection
-model #

62
Q

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:

A

Shock loading

63
Q

Basic type of boom truck

A

Articulating boom

64
Q

If the hook does not hang dead center from an extended boom on a boom truck, the problem would likely be

A

Truck not level

65
Q

To determine the total load weight for a lift, it his necessary to include

A

Any weight below the centerline of the top sheave.

66
Q

When rigging up a turntable mounted hoisting device, what is the most important thing to consider during setup.

A

Level the machine

67
Q

What is initially required to gain control of the load?

A

Determine the center of gravity

68
Q

How is a stowed jib kept in place?

A

Pins with retaining clips

69
Q

Tower cranes should not be operated when wind speeds reach

A

20-30mph

70
Q

Tower cranes fastened to the outside of a building need to be secured every

A

4 floors

71
Q

Limit switch operation in EOT crane should be checked

A

At the beginning of each shift

72
Q

Three main objectives of successful rigging are

A

Safety, communication, and control

73
Q

Every removable section of an EOT crane must be clearly identified with which of the following?

A

-weight
-serial #
-date of inspections
-model #

RIGGING (1 decks)

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