Industrial Rigging

Question 1

What is the weight of a 36 foot American Standard I-beam designated S15 x 42.9? Use the equation W=w/ft x L

Question 2

If a sling leg is attached to a suspended load at an angle less than 90 degrees, the horizontal force acting on the sling leg

Answer 2

Increases as the sling angle gets smaller

Question 3

If both ends of a sling are attached to the hoist hook and a load is suspended from the center of the sling, what hitch is being used?

Answer 3

Basket

Question 4

Which of the following hooks has a point designated to fit into a hole in the load?

Answer 4

Sorting hook

Question 5

If the strands of a wire rope appear to spiral down to the right, and if the wires in the strands appear to be parallel to the rope axis, the wire rope is

Answer 5

right regular lay

Question 5

A hook should be removed from service if

Answer 5

the tip is twisted from the unbent plane

Question 6

If a wire rope is classified 6 x 37, the figure 37 means that

Answer 6

each strand of the rope contains a nominal 37 wires

Question 7

Which of these wire-rope end fittings is the most efficient (assuming all are prepared correctly)?

Answer 7

speltered socket

Question 7

The following factors all affect wire-rope strength. In which is the D/d ratio important?

Answer 7

Bending over a curved surface

Question 8

If a rigger finds that a wire-rope sling is kinked, he should,

Answer 8

remove it from service

Question 9

Which of the following identifications would be most likely to appear on the links of a chain suitable for overhead lifting?

Answer 9

800

Question 10

The specification for welded-link chain that corresponds to a wire rope’s rated load is called the chain’s

Answer 10

working load limit

Question 11

If an alloy steel chain sling has been subjected to temperatures over 1000 degrees F

Answer 11

it should be removed from service

Question 11

There is a slot in one of the standard end fittings for metal mesh slings. It allows the sling to be used in a ____ hitch

Answer 11

Choker

Question 12

You should recommend removing a metal mesh sling from service if

Answer 12

one welded joint at the edge of the sling is broken

Question 13

The strongest and most popular of the synthetic-fiber ropes is

Answer 13

nylon

Question 14

To avoid sharp bending and abrasion, the eye of a fiber rope sling should include a

Answer 14

thimble

Question 15

A fiber-rope sling should be removed from service if it

Answer 15

shows kinking

Question 16

The rated load, or capacity, of an encased polyester sling is indicated by the

Answer 16

color of the cover

Question 17

You should remove a synthetic-web sling from service if

Answer 17

It is scorched

Question 17

A pocketwheel is part of an

Answer 17

overhead manual chain hoist

Question 17

The purpose of an upper limit switch is to

Answer 17

keep the load block from rising dangerously high

Question 18

The difference between top-running and underhung cranes lies in

Answer 18

How the end trucks of the bridge beams are supported

Question 19

When the rigger lifts a load a few inches, then stops to see if the load drifts downward, what is he checking?

Answer 19

Hoist brakes

Question 19

Wire rope should be removed from hoist service if the rigger finds

Answer 19

two broken wires at a socketed end fitting

Question 20

In a crane operation involving several people

Answer 20

the operator must respond to a stop signal from anyone

Question 21

You should not use metal-mesh slings

Answer 21

If the spirals do not move freely

Question 22

When working with floor-operated hoists and cranes, you should make sure that

Answer 22

obstructions can be cleared by the moving load

Question 23

One edge of the load serves as a pivot during ____ turning

Answer 23

one-hook

Question 24

When should blocks or other holding devices placed at the location where a load will be set?

Answer 24

before the load is lifted

Question 24

The height of a movable sectional metal scaffold that measures 4x8 ft. at the base should not exceed _____ ft.

Answer 24

16

Question 25

A hydraulic scissors lift of the larger type can safely support ____ workers and their equipment

Answer 25

2

Question 26

Each worker on a suspended scaffold must wear a safety belt connected to a lifeline that is attached to

Answer 26

the structure being worked on

Question 27

When you secure a scaffold with guy wires, what accessories do you use to tighten the wires to the correct tension?

Answer 27

turnbuckles

Question 28

A wooden ladder must NOT be coated with

Answer 28

paint