Rigging

Question 1

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

Answer 1

Whipping or seizing

Question 2

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

Answer 2

eye

Question 3

Name the three rope parts used in tying knots and hitches

Answer 3

1. running end
2. standing part
3. bight

Question 4

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

Answer 4

bowline on a bight

Question 5

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

Answer 5

Figure eight knot

Question 6

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

Answer 6

50-60%

Question 7

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

Answer 7

bowline knot

Question 8

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

Answer 8

False

Question 9

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

Answer 9

False

Question 10

What is the SWL formula

Answer 10

D2(squared) X 8

Question 11

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

Answer 11

8

Question 12

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

Answer 12

2

Question 13

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

Answer 13

1. straight lift
2. choker hitch
3. basket hitch

Question 14

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

Answer 14

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.

Question 15

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

Answer 15

inverted

Question 16

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

Answer 16

basket

Question 17

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

Answer 17

lengthens, increases

Question 18

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

Answer 18

break

Question 19

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

Answer 19

snatch

Question 20

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

Answer 20

Shell

Question 21

A come-along is actually a:

Answer 21

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

Question 22

What are the 4 basic types of jacks

Answer 22

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

Question 23

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

Answer 23

heavy timbers

Question 24

The first step to verify rigging details is to

Answer 24

“document the load”

Question 25

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

Answer 25

catspaw

Question 26

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

Answer 26

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

Question 27

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

Answer 27

40%

Question 28

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

Answer 28

double wrap choker hitch

Question 29

A typical block is sized by measuring

Answer 29

the shell

Question 30

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

Answer 30

come-along

Question 31

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

Answer 31

come-along

Question 32

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

Answer 32

single choker hitch

Question 33

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

Answer 33

seizing

Question 34

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

Answer 34

dunnage

Question 35

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

Answer 35

Calculating the load weight for cylinders

Question 36

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

Answer 36

Calculating the load weight of rectangular materials

Question 37

Name two types of clips for forming eyes in wire rope

Answer 37

J Bolt and U Bolt

Question 38

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

Answer 38

The lower hook, it will spread when overloaded

Question 39

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

Answer 39

Spur

Question 40

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

Answer 40

Break

Question 41

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

Answer 41

Snatch

Question 42

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

Answer 42

Shell