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First Year Millwright > Rigging, Crane and Hoist, Climbing, Lifting and Procedures > Flashcards

Rigging, Crane and Hoist, Climbing, Lifting and Procedures Flashcards

1
Q

What do you use on a boom truck to increase the cranes stability when you hoist?

A

Two sets of stabilizers

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2
Q

The tirfor are best used for?

A

Moving heavy equipment across the floors or horizontally

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3
Q

What are the common capacities for electric hoist?

A

1/4 to 5 ton

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4
Q

What can you do on the crawler-mounted lattice boom crane to give the crane more stability?

A

you can extend the tracks laterally to provide a wider stance

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5
Q

One of the most important considerations when assessing the condition of the ground on which a crane will sit is to?

A

to investigate whether the ground has been excavated recently

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6
Q

What are the two purposes of blocking when used with outrigger floats?

A
  • increases the bearing area of the float

* it prevents float from settling or sinking

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7
Q

What must you ensure when you are leveling a crane on outriggers?

A

that all tires are off the ground

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8
Q

In addition to using a target level or carpenters level, what other means can be used to determine that the crane is sitting level?

A

check if the hoist line is hanging plumb in two directions

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9
Q

What three (3) things affect the stability and reduce the lifting capacity of a mobile crane?

A
  • load distance
  • load weight
  • quadrant that the crane is lifting over
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10
Q

When the crane you are using is equipped with outriggers, what must you ensure?

A

the outriggers beams are extended fully and that all four tires are off the ground

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11
Q

For transportation purposes, where is the jib extension mounted on the carrier-mounted telescopic boom crane?

A

crane heel (base) section of the telescopic boom

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12
Q

What are two basic type of cranes?

A
  • hydraulic

* conventional

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13
Q

When estimating the weight of a material, what percentage of the safe load is added?

A

12 percent

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14
Q

What is the strength reduction on a bent rope?

A

50 % reduction

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15
Q

What is the strength reduction on a knotted rope?

A

50 % reduction

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16
Q

What is the strength reduction on a spliced rope?

A

15% reduction

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17
Q

What is the percentage on rope strength when a hitch is used?

A

75%

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18
Q

Tuggers are used for?

A
  • hoisting loads
  • lowering loads
  • pulling loads
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19
Q

The ratio for general rigging is?

A

5:1 or 5 is to 1

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20
Q

Safety factor for lifting and transporting workers

A

10:1 or 10 is to 1

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21
Q

Safety factor for public elevators

A

20:1 or 20 is to 1

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22
Q

When must you replace a rope?

A

when the surfaces are worn by 1/3 or more of their original diameter

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23
Q

What is the formula to calculate 5 to 1 factor on wire ropes for general rigging and hoisting?

A

D²x8

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24
Q

The first consideration on lifting a load is?

A

the weight of the load

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25
Q

The rope perimeter should be supported by the sheave in an arc of?

A

120 to 150 degree

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26
Q

All turnbuckles used for rigging must be made from?

A

Alloy steel

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27
Q

A scaffold must be design and constructed to support at least?

A

4 times the load

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28
Q

The OHS code provides the safety requirement for operating various types of hoisting equipment with a rated capacity of?

A

2000 kilos or more

29
Q

As a rule of thumb use a minimum sheave diameter of?

A

20 times the rope diameter

30
Q

What should never be used on turnbuckles?

A

Jam Nuts

31
Q

What is the minimum distance a ladder must protrude above the intended landing point?

A

1 metre or 3 ft

32
Q

What is the crane sweep area?

A

is the total area that the cranes boom can swing

33
Q

Why is chain better suited for certain hoisting jobs than wire rope?

A

Chain is more resistant to abrasion and corrosion

34
Q

Why is wire rope better for general construction rigging than chain?

A
  • chain fails when one link breaks

* chain gives little to no warning signs when is about to break

35
Q

What are the types of jacks available?

A
  • Porta power

* Bottle jack

36
Q

Remove from service any portion of lifting chain that is worn by?

A

10 % of the original diameter

37
Q

When should you remove a chain from service?

A

if the chain is stretched is more than 5%

38
Q

What is the recommend sling angle when rigging a load?

A

The sling angle must never be less than 60%

39
Q

What does the term shock loading mean?

A

when a load is expose to stress by having the load suddenly started or stop

40
Q

What is the goal of proper lifting techniques for the human body?

A

to eliminate loading stress on the soft tissue of your lower back

41
Q

How is Safe Working Load or SWL define?

A

Breaking strength divided by the safety factor

42
Q

What is the highest that a person should lift?

A

Lift no higher than eye level

43
Q

When conducting a hazard assessment related to lifting and handling a load, your employer must consider the?

A

Weight, Size and Shape of the load

44
Q

At what height must an employer have a guard rail erected for a temporary work area?

A

3 metres or 10 feet

45
Q

What is the strength reduction on a hitched rope?

A

25% reduction

46
Q

Where is the lifting capacity marked on a chain hoist?

A

on the hoist

47
Q

Only one type of natural fibre rope is sturby enough for lifting service?

A

number one grade Manila

48
Q

What is SF stands for?

A

Safety Factor

49
Q

What are tag lines used for?

A

to keep the load from turning or to swivel the load to avoid abstractions in the way

50
Q

When using hand signals, the operator and the signal man must what?

A

Agree on various hand signals

51
Q

Ratio for ladders?

A

4:1 or 4 is to one

52
Q

Ratio for scaffolds?

A

3:1 or 3 is to one

53
Q

Factors that can cause uneven loading on sling legs are?

A
  • varying sling legs length
  • lifting logs positions
  • sling eye positions in the lifting hook or shackles
  • a structure that is warped, twisted, or uneven
54
Q

The maximum capacity on a light duty house hold ladder is?

A

Type 3 - 91 kg

55
Q

Medium duty light commercial ladder has a maximum capacity of?

A

Type 2 - 102 kg

56
Q

The maximum capacity heavy duty building maintenance ladder is?

A

Type 1 - 113 kg

57
Q

The carrier mounted lattice boom crane is also known as the?

A
  • truck crane
  • mobile crane
  • conventional crane
58
Q

What is a conventional crane?

A
  • A conventional crane uses mechanical means to raise and lower the boom
  • The lattice boom is made from a structural pipe and steel
59
Q

What is one of the fibre ropes main use in the industry?

A

Safety lines / tag lines

60
Q

The maximum capacity on an extra heavy duty industrial construction ladder is?

A

Type 1-A - 136 kg

61
Q

What does EOT means?

A

Electric Overhead travelling

62
Q

What are the three methods of EOT crane controls?

A
  • cab operated
  • pendant control
  • radio control
63
Q

What happens when a EOT is to be inspected or to have maintenance done?

A

it must be tagged and locked out

64
Q

What supports the trolley on an electric overhead travelling crane?

A

the bridge

65
Q

Who must be present if you are moving the boom into the limit of approach?

A

A signaler or a signal man must be present at ALL times

66
Q

What is the term limit of approach means?

A

is the danger zone at which no boom, load, crane, or any hoisting equipment cant enter

67
Q

The minimum limit of approach is?

A

ten feet and it increases as voltage increases

68
Q

How should wooden scaffolds be constructed?

A

on painted dressed plain wood or lumber should be sound, close-grained S4S material, and all components should fitted tight together

69
Q

At what height should crane hooks be kept when not in use?

A

Always leave the crane hook above head height when not in use

First Year Millwright (9 decks)

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