B. Mech. module 6

Warning yarn

A component of the sling that shows the rigger whether the sling has suffered too much damage to be used.

Bridle

A configuration using two or more slings to connect a load to a single hoist hook.

Threaded shank

A connection end of a fastener, such as a bolt, with a series of spiral grooves cut into it. The grooves are designed to mate with grooves cut into another object in order to join them together.

Hoist definition

A device that applies a mechanical force for lifting or lowering a load.

Sheave

A grooved pulley-wheel for changing the direction of a rope's pull; often found on a crane.

Strand

A group of wires wound, or laid, around a center wire, or core. They are laid around a supporting core to form a rope.

double-wrap hitch

A hitch configuration that allows slings to be connected to the same load without using a spreader beam is a ____________.

steel plates

A lifting clamp is most likely to be used to move loads such as __________.

Sling reach

A measure taken from the master link of the sling, where it bears weight, to either the end fitting of the sling or the lowest point on the basket.

Wire rope

A rope made from steel wires that are formed into strands and then laid around a supporting core to form a complete rope; sometimes called cable.

Block and tackle

A simple rope-and-pulley system used to lift loads.

Bull ring

A single ring used to attach multiple slings to a hoist hook.

Plane

A surface in which a straight line joining two points lies wholly within that surface.

Bridle hitch

A(n) __________ __________ uses two or more slings to connect a load to a single hoist hook.

lifting clamp

A(n) __________ is used to move loads such as steel plates or concrete panels without the use of slings.

Hoist, pulley

A(n) __________ uses a ________ system to give you a mechanical advantage for lifting a load.

replacement links have been used to repair the chain

An alloy steel chain sling must be removed from service if there is evidence that ____________.

Rigging hook

An item of rigging hardware used to attach a sling to a load.

Load is properly balanced

Before attempting to lift a load with a chain hoist, make sure that the ___________.

Core

Center support member of a wire rope around which the strands are laid.

gear system

Chain hoists are able to lift heavy loads by utilizing a _____________.

Tattle-tail

Cord attached to the strands of an endless loop sling. It protrudes from the jacket. It is used to determine if an endless sling has been stretched or overloaded.

Shackle

Coupling device used in an appropriate lifting apparatus to connect the rope to eye fittings, hooks, or other connectors.

Unstranding

Describes wire rope strands that have become untwisted. This weakens the rope and makes it easier to break.

Manufacturer's name or trademark

Identification tags for slings must include the ______________.

removed from service immediately

If the identification tag on a synthetic sling is missing or illegible, the sling must be __________.

Tag line

Rope that runs from the load to the ground. Riggers hold on to them to keep a load from swinging or spinning during the lift.

synthetic material, alloy steel, and wire rope

Slings are commonly made out of __________.

Right angles

Standard eye-and-eye slings have eyes on the same plane, whereas twisted eye-and-eye slings have eyes at _______ _________ to each other.

Rejection criteria

Standards, rules, or tests on which a decision can be based to remove an object or device from service because it is no longer safe. Used when slings include a missing identification tag, a puncture, and crushing.

before every use

Synthetic slings must be inspected ____________.

sling, link

The ____________ is the _______ between the load and the lifting device.

load

The ____________ is the total amount of what is being lifted.

One-rope lay

The lengthwise distance it takes for one strand of a wire rope to make one complete turn around the core.

Master link

The main connection fitting for chain slings.

Sling legs

The parts of the sling that reach from the attachment device around the object being lifted.

Hitch

The rigging configuration by which a sling connects the load to the hoist hook. The three basic types are vertical, choker, and basket.

Load control

The safe and efficient practice of load manipulation, using proper communication and handling techniques. Prevents the load from moving freely.

Body

The size of a shackle is determined by the diameter of its __________.

load stress

The tension applied on the rigging by the weight of the suspended load is called the what?

Fiber core

The type of wire rope core that is susceptible to heat damage at relatively low temperatures is the what?

splice

To form an endless-loop web sling, ___________ the ends together.

horizontally with a palms down and quickly move both arms back and forth

To make the Emergency Stop signal that is used by riggers, extend both arms ___________.

Choker hitch

When a load has no attachment points or when the attachment points are not practical for lifting, it is best to use a ___________.

Sling

Wire rope, alloy steel chain, metal mesh fabric, synthetic rope, synthetic webbing, or jacketed synthetic continuous loop fibers made into forms, with or without end fittings, used to handle loads.