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Term 2: Math, Drawing & Rigging > Rigging > Flashcards

Rigging Flashcards

1
Q

NAme the fastening method which prevents fraying and does not increase the size of the end of the rope.

A

Whipping or seizing

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2
Q

A permanent-type loop may be made in the end of a rope by forming an ____ splice.

A

eye

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3
Q

Name the three rope parts used in tying knots and hitches

A
  1. running end
  2. standing part
  3. bight
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4
Q

When a loop is needed at any point between the ends of a rope, what is the proper knot to tie?

A

bowline on a bight

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5
Q

Name the knot that is easier to untie and is larger and stronger than the overhand knot

A

Figure eight knot

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6
Q

Compared to the strength of a rope, how much do knots usually develop?

A

50-60%

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7
Q

The knot which is used to complete a barrel hitch is called the ____

A

bowline knot

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8
Q

True or False - The catspaw knot is ideal for tying two smaller knots together.

A

False

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9
Q

True or False - The single sheet bend should be used for tying two ropes together of equal diameter

A

False

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10
Q

What is the SWL formula

A

D2(squared) X 8

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11
Q

How many times should seizing wire be wrapped around wire rope to make an adequate seizing?

A

8

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12
Q

How many wire rope seizings are required for 1/2” wire rope

A

2

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13
Q

Name the three basic hitches which can be used for lifting with a sling

A
  1. straight lift
  2. choker hitch
  3. basket hitch
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14
Q

Why should the angle between the leg of a sling and the load never be less than 30 degrees?

A

The smaller the angle, between the leg and the horizontal plane of the load, the greater the tension on the sling legs when force is applied.

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15
Q

Sling eyes are actually small ____ slings at the end of wire rope.

A

inverted

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16
Q

_____ hitches distribute the load equally between the two legs of a sling.

A

basket

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17
Q

As the boom on a crane ______ or the operating radius _____ the hoisting capacity of the crane decreases.

A

lengthens, increases

18
Q

Chain hoists should be equipped with an automatic load ____ to prevent the load from dropping

A

break

19
Q

When it is desired to change the direction of pull in a tackle system, it is necessary to use a ___ block

A

snatch

20
Q

The size of the block is determined by measuring the length of the ____

A

Shell

21
Q

A come-along is actually a:

A

lever ratchet, winch-hoist with self-storing aircraft cable

22
Q

What are the 4 basic types of jacks

A

ratchet
screw
hydraulic jack with integral pump
hydraulic jack with separate pump

23
Q

The materials used under the lowered load to provide clearance for the removal of the rigging are generally

A

heavy timbers

24
Q

The first step to verify rigging details is to

A

“document the load”

25
Q

Which of the following knots is used to attach a hook such as a tackle block at any point on a rope between its ends? catspaw, half hitch, single sheet bend, snubbing hitch

A

catspaw

26
Q

Rules for using a crane do not allow the hoist rope to be wrapped around the load. What should be used?

A

the load should be attached to the hook by means of a sling

27
Q

Even if one wire rope clip is installed incorrectly, efficiency of connection may be reduced up to

A

40%

28
Q

The sling configuration that compresses the load and prevents it from slipping out of the sling is the

A

double wrap choker hitch

29
Q

A typical block is sized by measuring

A

the shell

30
Q

What is another name sometimes given to a cable winch hoist?

A

come-along

31
Q

What is another name sometimes given to a cable winch hoist?

A

come-along

32
Q

Which sling configuration is not suited to long, loose bundles since the load/materials can fall out?

A

single choker hitch

33
Q

Applied prior to cutting rope, wrapping with wire, cord or tape to prevent unraveling is called

A

seizing

34
Q

What is the material used under a load to provide clearance for rigging and facilitate future handling, sometimes also called cribbing, called?

A

dunnage

35
Q

What is the following formula for: [.7854 x D2(squared) x length x density]

A

Calculating the load weight for cylinders

36
Q

What is the following formula for? [L x W x H x D]

A

Calculating the load weight of rectangular materials

37
Q

Name two types of clips for forming eyes in wire rope

A

J Bolt and U Bolt

38
Q

What is the weakest part of a chain hoist? Why?

A

The lower hook, it will spread when overloaded

39
Q

The ____ gear chain hoist is the most efficient of all chain hoists

A

Spur

40
Q

Chain hoists should be equipped with an automatic load ____ to prevent the load from dropping

A

Break

41
Q

When it is desired to change the direction of pull in a tackle system, it is necessary to use a ____ block

A

Snatch

42
Q

The size of the block is determined by measuring the length of the _____

A

Shell

Term 2: Math, Drawing & Rigging (3 decks)

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