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Rigging > advanced > Flashcards

advanced Flashcards

1
Q

What is meant by the term “two blocking”?

A

The load block contacts the boom point sheaves.

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2
Q

Lifting 20,000 lbs with a 2-leg bridle sling at a 30 horizontal sling angle, what is the force applied to each leg?

A

20,000 pounds

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3
Q

In multiple crane lifts using an equalizer beam, the weight of the beam should be considered:

A

Part of the load weight

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4
Q

What is required of there is a deviation from the lift plan?

A

A new lift plan

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5
Q

On level ground using skids and rollers, what percent of the weight of the load should yield the required line pull as a general rule of thumb?

A

5%

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6
Q

All of the following are results of unbalanced reeving of the hook block EXCEPT:

A

Wear on the hook

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7
Q

Before a spreader bar or beams can be used the MUST have been:

A

Tested and Approved

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8
Q

When materials are being hoisted to an upper level, a tag line is used to:

A

Help control the load

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9
Q

Two cranes are lifting 100 tons. If crane A has 40% of the load, how much weight will crane B have on its hook?

A

60,000 lbs

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10
Q

To CONFIRM the rated capacity of a specific sling, consult the manufacturer’s:

A

Sling Tag

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11
Q

OSHA regulations require hook replacement if the opening exceeds what percentage of its original throat opening:

A

15%

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12
Q

At what percentage of increase in length should a chain sling be removed from service?

A

5%

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13
Q

The methodical process that attempts to identify hazards and devise plans to overcome or eliminate hazards which which may interfere whit crane of rigging is called:

A

Lift Plan

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14
Q

What provides additional control of a load being lifted?

A

Tag Lines

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15
Q

When traveling on a rubber tire mobile crane, how should the boom be positioned?

A

In line with the direction of travel

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16
Q

Before performing pick and carry operations with any mobile crane, it is important to:

A

Refer to the manufacturers capacity chart

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17
Q

According to ASME B30.5, a two crane lift is signaled by:

A

One designated person

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18
Q

What is the PRIMARY concern when working with high boom angles?

A

Backward stability

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19
Q

On multiple crane lifts, the load on each crane should NOT exceed what percentage of capacity?

A

75%

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20
Q

What are lifting lugs?

A

Eyelets welded to a steel plate for lifting

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21
Q

The formula for determining stress on a snatch block performing a vertical lift is: line pull x block factor = block load. What must be done to calculate formula?

A

Multiply the load weight by the coefficient of frictionto determine line pull, and the use the standard formula

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22
Q

if both fists are placed in front of your body with your thumbs pointed outward, the crane operator should:

A

Extend the boom sections

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23
Q

What is the MAXIMUM percent of the rated capacity of a crane that can be used to lift personnel?

A

50%

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24
Q

When does lightening present the greatest hazard to the crane and rigging personnel?

A

When thunder and lightning are apparent

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25
Q

What force would be required to move an object up an inclined plane compared to lifting it vertically?

A

1 1/2 times more

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26
Q

Personnel platforms shall NOT be used to lift:

A

Tools and materials without employees

27
Q

All of the following are reasons for stopping personnel lifting operations EXCEPT:

A

There are no tag lines

28
Q

When working in close quarters, the main concern is:

A

Safety

29
Q

The point of any object’s weight can be assumed to be concentrated at:

A

Center of gravity

30
Q

In a spur-gear chain hoist with a two chain system, the endless chain is used to:

A

Raise and lower the load

31
Q

In an emergency situation, what is the rigger’s FIRST priority?

A

Te prevent injury of loss of life

32
Q

All of the following conditions exert dynamic loading on a crane EXCEPT:

A

Static boom angle

33
Q

Proper lead sheave placement as it relates to the hoisting drum location is:

A

Proper spooling of wire rope

34
Q

The MOST important information to consider when planning a lift is:

A

Weight of the load

35
Q

Prior to use, all new, altered, modified, or repaired rigging hardware shall be inspected by whom?

A

A designated person

36
Q

An unsafe condition that riggers should be aware of when dealing with a multi part load block is:

A

Twisting multi part lines

37
Q

Most cranes in duty cycle operation require a:

A

Load test

38
Q

The only personnel allowed to have their body parts outside of the suspended personnel platform during hoisting and lowering operations are:

A

Signal persons

39
Q

What is the most important reason rigging hardware should NOT be modified?

A

It could negatively affect its capacity

40
Q

In the term (D / d ratio) the d is an abbreviation for:

A

Diameter

41
Q

A document that outlines weights, crane configuration and rigging requirements for a lift is called a:

A

Lift plan

42
Q

When using a 1-inch wire rope sling in a vertical basket hitch lifting a 24-foot long, 36-inch diameter pipe,

A

36 to 1

43
Q

What is LMI?

A

Load movement indicator

44
Q

Location of electrical hazards on the job site should be documented on a:

A

Lift plan

45
Q

When forming a lift plan, a PRIMARY concern for the person doing the rigging is

A

Capacity of rigging

46
Q

When using a wedge socket, the dead end of the rope is secured in the socket by the:

A

Wedge

47
Q

When erecting or stowing a swing-away lattice extension, what should be used to control the movement of the extension?

A

Tag line

48
Q

Planning for rigging is required:

A

Only when lifting any load

49
Q

A lift plan MUST be completed by a:

A

Supervisor

50
Q

Anchorage points for fall arrest for a single person MUST be able to hold:

A

500 lbs

51
Q

Which of the following items are used for heavy rigging?

A

Slings, shackles, and spreader beam

52
Q

If the jacket of a synthetic round sling is damaged, that sling should be:

A

Removed from service immediately

53
Q

Which of the following is NOT a factor when making submerged lifts?

A

Water temperature

54
Q

When a tugger is mounted where the operator can NOT see the load, the signal person MUST use:

A

Signals used for cranes

55
Q

Who can designed a personnel platform?

A

A qualified personnel

56
Q

A one-inch, 3-leg bridle wire rope sling, rigged at a 45degree angle, is good for 18 tons. The addition of a fourth leg will increase your capacity by:

A

0 lbs

57
Q

After any structural repair or modification, a personnel lifting platform shall be tested to what percentage of the platform rating?

A

150%

58
Q

All of the following statements about crane contact with power lines are TRUE EXCEPT:

A

The operator should leave the cab as quickly as possible

59
Q

Loads introduced into the machine or its components due to accelerating or decelerating force is called:

A

Dynamic loading

60
Q

Using the sling chart provided, what is the rated capacity of a 1/2 inch sling in a basket hitch with sling legs 90 degrees?

A

6,200 lbs

61
Q

When lifting 100,000 pounds, the main load block must be reeved with how many parts of line?

A

4

62
Q

What standard hand signal is being communicated in the illustration?

A

Travel (one track)

63
Q

What standard hand signal is being communicated in the illustration?

A

Use whip line

Rigging (1 decks)

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