Steamfitter Rigging

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

8 wraps

A crane must be placed on a firm footing or surface which is uniformly level within ____ percent.

1

weight of legs at vertical when a load is 2,000 lbs

1,000 lbs each leg

weight of legs at 60 degrees when a load is 2,000 lbs

1,155 lbs each leg

weight of legs at 45 degrees when a load is 2,000 lbs

1,414 lbs each leg

List 4 characteristics for polypropylene rope.

1. 1 3/4 times the strength of manila 2. lightweight, can float 3. resistant to rot and mildew 4. moderate elasticity characteristics

List 4 characteristics for nylon rope.

1. 2 1/2 times the strength of manila 2. able to handle shocks of heavy loads the best 3. resistant to rot and mildew 4. greater elasticity than some other rope materials

List the four major requirements of rope fastening.

1. It will not slip 2. The knot is strong & suitable for the job. 3. It can be tied easily 4. It an be untied easily.

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

1. choker 2. basket 3. vertical

List four requirements concerning the use of personal protective equipment and clothing for the individuals receiving the load in a helicopter hoist.

1. complete eye protection 2. hardhat w/ chinstrap 3.rubber gloves 4. no loose clothing

Name the three rope parts used in tying knots and hitches.

1. running 2. standing 3. bight

List seven sources where load weight data can be obtained.

1. shipping info 2. design plans 3. catalog data 4. erection plans 5. calculate loads 6. specifications 7. other dependable sources

List 2 characteristics for manila rope.

1. susceptible to rot and mildew natural 2. silver, pearl color, waxy

What is the safe working load of a 1" eye hook?

1500 lbs

How many wire rope seizings are required for 1/2" wire rope?

2

weight of legs at 30 degrees when a load is 2,000 lbs

2,000 lbs each leg

Manila Rope SWL 1/2" manila rope = _____ diameter SWL = _____ SWL = _____ 5/8" manila rope = ____ diameter SWL= _____ SWL= _____ 1" manila rope = _____ diameter SWL = _____ SWL = _____

4/8" 4 x 4 x 20 320 lbs 5/8" 5 x 5 x 20 500 lbs 8/8" 8 x 8 x 20 1280 lbs

Polypropylene Rope SWL 1/2" polypropylene rope = ____ diameter SWL = ____ SWL = ____ 1 1/4" polypropylene rope = ____ diameter SWL = ____ SWL = ____

4/8" 4 x 4 x 40 640 lbs 10/8" 10 x 10 x 40 4,000 lbs

Nylon Rope SWL 1/2" nylon rope = ____ diameter SWL = ______ SWL= ______ lbs 3/4" nylon rope = ____ diameter SWL = _____ SWL= ____ lbs

4/8" 4 x 4 x 60 960 lbs 6/8" 6 x 6 x 60 2,160 lbs

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

45% - 50%

How many J-bolt clips should be applied to 1" wire rope for safety?

5

Describe the operation of a double-action jack.

Lifts load on both upward & downward strokes.

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

eye

Soft-laid rope is the type that should be chosen for duty with blocks or sheaves. T/F

false

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

figure eight knot

*T&E* Half Hitch

finish off other certain knots

The maximum rating of a crane is when the boom is at a _____ length and at a near ____ position.

fixed, vertical

*T&E* Bowline Knot

forming a loop that will not slip under strain and can be easily untied

A mistake made in tying the square knot may result either in a ____ knot or a ____ knot.

granny, thief

A rigging operation involving the use of a helicopter is under the direct control of the ____

helicopter operator

*T & E* Pipe Hitch

hoisting pipe or tubing, prevents slippage, continues to tighten under strain

When a two-legged sling is used. Tipping of the load results in an ____ in load on one leg of the sling and a ____ in load on the other.

increase, decrease

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

inverted

*T&E* Figure Eight Knot

keep the end of a rope from running out of a pulley

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

lengthens, increases

What is the meaning of the term "dog everything"

lock & secure load in place and wait for further signal

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

lower hook, spreads when overloaded

*T&E* Running Bowline Knot

made to make a running noose, slip that can't be untied

What precaution should be taken when replacing the handle on a cable winch hoist?

order it w/ an additional handle, replace w/ a real handle

The inside of a rope should be continuously inspected for broken yarns by throwing a twist ____ the rope

out of

A jack is a device used to ____ or ____ equipment into place, or to ____ heavy loads a short distance.

raise , lower, move

No crane shall be loaded beyond its ____ load

rated

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

seizing or whipping

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

shell

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

slings & other approved devices

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

spur

What is an advantage of the screw jack over the ratchet jack?

stronger

Why are eyes, in wire rope, formed with pressed metal sleeves better than eyes made by using wire rope clips?

stronger, gives the shape better

Why are only eye or jaw combinations recommended with those turnbuckles that are being used where vibration is present?

the frame (body) can be prevented from unthreading by securing piece with end attachment

Name two types of clips for forming eyes in wire rope.

u-bolt & j-bolt

*T&E* Square Knot

used for tying 2 dry ropes of the same size diameter together

*T&E* Catspaw Knot

used to attach to hook, doesn't slip under strain, easy to untie

What precaution should be taken to increase visibility where dust is present in helicopter hoisting operations?

water down the pickup & landing areas

*T&E* Clove Hitch

attaching to an object for a right angle pull

If a single choker or a ____ sling is used on a long load, the load may bend if it is slender and it will be difficult to control.

basket

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

bowline

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

bowline knot

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

bowline knot

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

brake

Why should a back splice be avoided when reeving a block and tackle system?

The diameter of rope increases and doesn't sit right in the block.

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

The tension on the leg will be heavier than the load

What is the purpose of the core in wire rope?

absorb shock, keep shape, add support, keep strands from rubbing inside, add 7-10 % strength

Since a straight pull is required when using a shackle, how is the eye or hook kept in the center of the pin?

add washers or pipe clips to keep centered

When making an eye splice tucking should be in a direction ____ the lay of the rope.

against

What special precautions must be exercised when trash is being burned in the vicinity of a helicopter hoisting operation?

all fires are to be extinguished

Choker hitches distribute the load equally between the two legs of a sling. T/F

False

It is a good idea to lubricate rope occasionally if it is cleaned first. T/F

False

It is impossible to install U-bolt clips incorrectly. T/F

False

Jerking a rope while hoisting a load is good practice if a jerk is necessary to start the load moving. T/F

False

Seizing of manila rope can be easier than seizing synthetic rope because manila rope will melt before it begins to burn. T/F

False

The catspaw knot is ideal for tying two smaller ropes together. T/F

False

The painting of hooks is recommended to prevent the hooks from rusting. T/F

False

The single sheet bend should be used for tying two ropes together of equal diameter. T/F

False

Wire rope is seldom used for slings in hoisting heavier materials since the flexibility is not as good in wire rope as it is in manila rope. T/F

False

Wire rope should be uncoiled in the same manner as manila rope. T/F

False

What is the difference between the core member of fiber core wire rope, independent core wire rope, and wire strand core wire rope?

Fiber core: natural vegetable or man made fibers independent wire rope core: a separate wire rope wire strand core: typical strand of the wire rope

What is the minimum safe working distance when operating a crane in the vicinity of a high voltage line carrying 10,000 volts?

No less than 10 ft

What is meant by the term "approach distance" as it is used in helicopter hoisting?

No unauthorized person may approach the helicopter within 50 ft when the rotor blades are turning.

Provide the rule of thumb field calculation formula for the SWL of wire rope for the single vertical hitch.

SWL = D^2 x 8

A wire rope with a 6 x 7 classification is referred to as coarse laid rope. T/F

True

Clips should be spaced every six rope diameters regardless of the type of clip. T/F

True

Regular right-laid rope should be uncoiled in a counter-clockwise direction. T/F

True

When ropes used as guy lines are exposed to weather, they should be slacked off in wet weather. T/F

True

When are bell or whistle signals used hoisting?

when the person directing the load cannot see the operator of the crane

Wire rope sockets are attached to wire rope by pouring molten ____ inside the socket.

zinc