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Review Flashcards

Test (94 cards)

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1
Q

how do you determine that Manila rope may be used for rigging purposes?

A

By the color of the strand

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2
Q

list three natural fibers rope materials?

A

Vanilla, cotton, hemp

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3
Q

what Lay of rope is generally recommend for rigging purposes?

A

Regular Lay

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4
Q

Rope is sized by its?

A

outside diameter

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5
Q

How should rope be stored?

A

in a moisture free container

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6
Q

what type of knot is used when running it through a pully?

A

Eye splice

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7
Q

safe working load formula for wire rope is?

A

D^2x45

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8
Q

to prevent fraying of a rope you can_

A

whipping or seizing

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9
Q

when cutting synthetic wire rope By Flame cutting or melting what two precautions should be taken?

A

melting material and inhaling flames

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10
Q

what splice is used for making a permanent loop at the end of the line

A

Eye splice

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11
Q

what are the four major requirements for rope fastening

A

it will not slip
knot is strong and suitable for the job
easy to tie
easy to untie

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12
Q

what is the best knot to use to keep the end of a rope from running out of a tackle or pulley

A

A figure eight knot

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13
Q

what type of knot should not be used to hoist pipe

A

clove hitch

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14
Q

another term for square knot is

A

Reef knot

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15
Q

most commonly Miss tide knot is

A

a square knot for a reef knot

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16
Q

commonly mistaken by a square knot

A

a granny knot

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17
Q

what is the purpose of a bowline on a Bight

A

to have a loop anywhere on the rope

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18
Q

most of the wire selected for making wire rope is made from two grades of Steel name these two grades and provide their tensile strength

A

IPS 240,000 lbs per square inch

EIPS 10% more than IPS

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19
Q

what is the purpose of a sheet Bend

A

ting two unequal size rope together

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20
Q

what are the five purposes for the core of a wire rope

A 
maintain its shape
prevent strands from rubbing against each other 
absorbing shock
adds 7 to 10% strength 
lubrication
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21
Q

what about the construction of wire rope determines its flexibility

A

the number of strands

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22
Q

what is the definition of lay as its used regarding rope

A

Olay is the distance it takes to make one complete Revolution with a strand

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23
Q

multiple Part slings are referred to as

A

bridles or spreaders

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24
Q

When selecting sling types and sizes what eight factors should it be based on

A 
wieght of load
shape and balance
how to lift it
size of load
overhead room
environment 
it's load capacity 
is marrying the material possible
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25
three basic hitches
a basket hitch a straight hitch and double hitch
26
slings that are damaged or defective can be used on lighter loads
slings should always be taken out of service when damaged or defective
27
the surrounding area of a load to be hoisted by helicopter should be cleared of debris within how many feet
100 feet
28
list of PPE required for helicopter lift
chin straps rubber gloves light clothing eye protection
29
what is a crane?
mechanical means to move heavy loads safely
30
before starting to hoist note the following conditions?
the Hoist rope shall not be kinked the multiple part line shall not be wrapped on each other the hook shall be brought over the load in such a manner as to prevent swinging the tagline she'll be a fix to all those prevent on leveling or control swing of objects to be hosted a cranes footing shoulb be level within 1 degree the pic should be within five degrees
31
Journey workers must be competent and should know the following
establish wieght judge distance select table and load rig safely
32
who is General responsible for the safety of a lifting operation as soon as load is lifted
the crane operator
33
What distance must be maintained from a high-voltage source by a crane
15 feet
34
when are bells or whistles used as signals
on a blind pick
35
what type of chain Hoist is commonly used in our trade
a spur gear
36
never use a chain hoist for a
horizontal pull
37
when do you due a visual inspection of hardware or rigging equipment
Before AND after
38
counting the number of supporting ropes of a block and tackle gives you the
mechanical advantage
39
what is the lower block of the crane called
the main block
40
what Jack type has the simplest Construction
she ratchet Jack
41
what type of Jack is used for loads over 25 tons
a screw jacks
42
metal to metal jacking
is never permitted
43
when using Jacks in a horizontal position to move an object the Jack should be
tied up
44
the diameter of the loop formed in a wire rope should be?
eight times the diameter of rope
45
an eye formed by wire rope clips provides what rated capacity
80%
46
the space between wire rope clips should be equal how many times the diameter of the Rope
6 times
47
what metal is used to pour the sockets of fittings joining wire ropes
zinc
48
a hook should be painted
never
49
what type of shackle is most commonly used in our trade
anchor Bow shackles
50
how do you determine the size of a shackle
by the size of the bow
51
what is the 3/6 rule
3 broken wires in one strand or six broken wires randomly distributed among all strands within one lay length
52
how is load radius of a crane determined
the crane manual
53
The Single Leg of a bridle sling should be able to carry
the entire load
54
where is the slewing ring located on a fixed Tower configuration
on the top of the tower
55
what should be used if more than one lifting cable is to be handled by a chain hoist
Shackle
56
when drifting loads the angle it should not exceed how many degrees from vertical
30 degrees
57
the weakest part of a chain hoist or chain fall is
bottom of the hook
58
what are four basic types of jacks
hydraulic rachet screwed pneumatic
59
wire core is how many times stronger than fiber core
7 1/2 times stronger
60
wich wire rope class is listed as non rotating?
35 strand
61
wich class of wire rope is listed as spin resistant?
8 strand wire rope
62
wich class of wire rope is listed as rotation resistant?
19 strand wire rope
63
wire rope should be replaced if the wear in the outer strand wires exceeds?
1/3 of its original diameter
64
wich product is suitable for lubricating wire rope?
light mineral oil
65
what happens when a wire rope is bent around a sheave or hook?
nominal strength is reduced
66
1 inch wire rope eye sling lifting a load with a 1 inch shackle will be approximately how efficient?
50 %
67
with in "improved plow" wire rope sling the preferred D/d basket hitch ratio is
25 to 1
68
shackles are only rated for their maximum capacity when used for what type of pull
straight line pull
69
with two shackles or eye sling eyes in a hook, what is the suggested maximum included lifting angle?
90°
70
a wedge socket must be attached with the load line pulling in a straight line pull from the?
Pin
71
custom fabricated lifting beams or any homemade lifting device must be?
1. designed by an engineer 2. have a rated capacity clearly stamped 3 be test lifted at 125% of its rated capacity
72
what is the mechanical advantage ratio created on the top fixed sheave of six block hoisting system?
none
73
when determining the number of parts of a line needed for rigging a system. what unknown factor makes the use of a ratio chart a necessity?
friction
74
if the wire rope hoist line coming off a drum is fed into a sheave how must the sheave be positioned?
aligned with the fleet angle
75
what's the fleet angle on a grooved drum?
2° fleet angle | 30 feet from half the drums width per ft
76
what's the fleet angle of a smooth drum?
1 1\2° fleet angle | 40 ft for half the drums width per ft
77
air operator taggers remove moisture in the lines by
blowing them out first
78
the most commonly used grade of natural fibers rope is ?
Manila
79
knots in fiber rope reduce strength by?
50%
80
which splice is used when forming an eye around fiber rope?
side splice?
81
which not can be used as a rescue knot?
Spanish bowline
82
what's known as the killer knot?
reef knot or square knot
83
critical lift conditions?
1. when lift is over operating or electrical equipment 2.when modified crane or equipment is needed 3.the wieght of the load exceeds set limits 2 cranes 4. any laid over 75% cranes capacity
84
short splice?
short splice doubles the diameter
85
what knot doubles the diameter?
short splice
86
Eye or side splice
to make eyes in fiber rope
87
knot that makes eyes in fiber rope
Eye or side splice
88
three parts of a rope
1. running end 2. bight 3. standing end
89
knot to rig pipe with rope?
pipe hitch
90
catspaw
to attach load to hook?
91
on a four part pick, how many slings are holding the load?
two slings
92
to invert a load you want the heaviest part of a load to be ?
on the bottom
93
sheave diameter rule
20 times the diameter of rope
94
alloy of a lifting chain
88 or 8 8

Rigging (1 decks)

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