test

Question 1

When the load is lifted, swinging is minimized when the ____ is directly above the center of gravity.

Answer 1

hook

Question 2

most wire ropes have ____ strands.

Answer 2

six

Question 3

When a chain is about to fail, it _____?

Answer 3

give no warning

Question 4

friction in rope blocks adds a force of about _____

Answer 4

10% of the weight of the load for each sheave the rope passes around

Question 5

the strongest rope material is ______

Answer 5

nylon

Question 6

The working load limit of a wire rope sling is 1000 pounds. Its breaking tension is ?

Answer 6

5000 lbs

Question 7

the best knot for joining two ropes together is a _____

Answer 7

sheet bend

Question 8

When using more than one sling to lift a load, attach all the slings to a bolted shackle, then lift the shackle with the hook T/F

Answer 8

true

Question 9

rigging can be defined as

Answer 9

the process of attaching rope, blocks, and other special equipment on loadstone be moved

describing the equipment used for lifting or lowering loads.

Question 10

to avoid confusion, all signal directions are given ____?

Answer 10

from the perspective of the operator.

Question 11

What is the mechanical advantage of a set of blocks with 6 load lines, 3 going into the movable block and 3 coming out of the movable block?

Answer 11

6

Question 12

when a transformer is to be lifted, a common procedure is to attach the sling to the ____ on the transformer

Answer 12

lifting points

Question 13

the typical safety factor for wire rope swings is ____

Answer 13

5

Question 14

The best knot to tie when it is needed to be loosed under strain and then slacked under control is the _____

Answer 14

Munter

Question 15

When there is a crane-related death, the victim is most often a _____

Answer 15

rigger/signal person

Question 16

Shock loading is when as object contacts an energized conductor. T/F

Answer 16

false

Question 17

A half-hitch fiber rope has a breaking strength of 1,200 lbs. the safety factor is 5. the working load limit is ____

Answer 17

240 lbs

Question 18

Hand Line
Bull line
tag line
pulling rope

Answer 18

1. raise and lower materials
2. Variety of heavy jobs
3. Control loads being raised or lowered
4. stringing conductors

Question 19

nylon rope is

Answer 19

light and flexible

elastic, making it a good choice for absorbing shock loading

good insulator, making it a good choice for live line work

Question 20

a 2-leg sling is lifting a load weighing 2000 lbs. The length of each leg of the sling is 3 feet. The hook height is 2 feet. The tension in one leg is ____

Answer 20

1500 lbs

Question 21

If a shackle pin is damaged, it should be replaced with a bolt of the same diameter, secured to the shackle with a rated nut and lock washer. T/F

Answer 21

False

Question 22

When the sling angle will be small, one solution is to use a _____

Answer 22

Spreader bar

Question 23

a 2-leg sling is lifting a load weighing 2000 lbs. The legs of the sling are vertical. The tension in one leg is ____?

Answer 23

1000lbs

Question 24

once the proper equipment for a rigging job has been chosen, the equipment should be ______ to make certain it is in good working order.

Answer 24

inspected

Question 25

fiber rope is made up of many fibers that are twisted together to form strands T/F

Answer 25

true

Question 26

When preparing for a lift, the first step is _____

Answer 26

determine the weight of the load

Question 27

natural fiber ropes are stronger than synthetic fiber ropes T/F

Answer 27

false

Question 28

Knots reduce the strength of ropes T/F

Answer 28

true

Question 29

The mot common use of the figure eight knot is ____

Answer 29

to prevent strands at the end of a rope for unlaying

Question 30

When using a rope sling in a basket configuration, the diameter of the object should be large, compared with the diameter of the rope.

Answer 30

true

Question 31

Fiber rope made from manila, sisal, or cotton is generally classified as ____ rope

Answer 31

natural

Question 32

When Reeving rigging blocks ______

Answer 32

The lead line should come from the center block

Question 33

When working near distribution power lines up to 50 KV the boom should stay at least _____ away from any conductor

Answer 33

10 ft

Question 34

A sling used to attach a hand line to a pole should br about half as large in diameter as the rope used in the hand line T/F

Answer 34

false

Question 35

Working load limit is defined as

Answer 35

Breaking strength divided by the safety factor

Question 36

Bowlines are easy to untie while under strain T/F

Answer 36

false

Question 37

The strength of slings is reduced by _____

Answer 37

knots
used rope
small bending radius

Question 38

Chain used in hoists may be lubricated to prevent rust T/F

Answer 38

true

Question 39

A sheave is a roller in the opening in a block that a rope passes over T/F

Answer 39

True