E2 - Use Rigging and Hoisting Equipment Flashcards
What kind of rope has the best electrical insulating properties when dry?
Prolypropylene
When loaded to the breaking point, how much will Nylon rope stretch to?
40% It’s original length.
What is the purpose of whipping?
It prevents the ends of a rope from fraying.
The maximum load imposed on a rope should never exceed how much?
1 / 9 it’s breaking strength.
Sharp knots and bends can reduce the strength of a rope by up to how much?
50 %
What is the Working Load Limit?
The maximum load that a rigging component may carry and meet the safety factors set by WorkSafeBC. The minimum safety factor for rigging used to support working is 10.
What is the breaking strength of a rope?
The breaking strength is the minimum force necessary to break the rope, it is measured in Newtons or pounds.
What must you use when attaching a small diameter object to a rope?
Use a thimble to protect the eye of the rope.
What is the purpose of whipping a rope?
The purpose of whipping a rope is to prevent the strands from unraveling. It helps to prevent the strands from carrying an uneven amount of load.
Should you join ropes for overhead lifting?
No.
The bowline loop is used when?
The bowline loop is used when a slip-proof loop is needed.
The reef knot or square knot is for what purpose?
The reef knot is used to fasten two ropes of equal diameter together.
The sheet bend knot is used for what purpose?
The sheet bend knot is used to attach two ropes of unequal diameter together.
What is the purpose of the clove hitch?
The clove hitch is used to secure a rope to a fixed object, such as a post.
What is the purpose of a timber hitch?
The timber hitch is used to secure a rope to a plank, timber, post or pipe when that object is to be lifted into an upright position.
What is the trucker’s knot useful for?
The trucker’s knot is very useful for tying down a load.
What is the purpose of a figure eight knot?
The figure eight know is used to make a stopper at the end of a rope.
The knot which multiplies tension you apply to the rope is which?
The trucker’s knot.
What is the purpose of a turn buckle?
The purpose of a turn buckle is to adjust the lengths of slings so that loads can be level when lifted upwards.
The three kinds of ends that are available for a turn buckle are what?
Eye, jaw and hook.
When the end of a turnbuckle is prone to rotation due to vibration, what step needs to be taken?
The ends need to be wired to the sleeve with a lock wire.
Shoulderless eye bolts are great for overhead lifting. True or false.
False. Never use shoulderless eye bolts in overhead lifting, as force applied from the side at any angle could break the stem of the bolt.
If a should type eye bolt is pulled at 50 degrees, what will happen?
The eye bolt will either break or bend.
What is a purpose of a shackle?
A shackle is used to connect a sling to a load. They are used whenever two or more ropes are to be placed over a hook.
What is the purpose of a cable clip?
A cable clip is used to fasten the end of a wire rope back onto its standing part to form a loop.
Slip and grab hooks are generally used for what purpose?
Slip and grab hooks are attached to the ends of chains to pick up or pull a load.
What is the purpose of a sorting hook?
They are primarily used at the end of slips for picking up steel plate and other steel structural shapes.
What should be used to protect chains from the stress of twisting?
All hosting chains should have a swivel to protect them from the stress of twisting.
What is a choker hook?
A choker hook is a fitting at the end of a sling that protects the rope that the hook connects to from sharp bends.
This item is used to connect the loads to the lifting device.
What is a sling?
This kind of sling is softer and wider than most other slings, better protecting the load against marring or scratching.
What is a synthetic web sling?
Why use a metal mesh sling opposed to a synthetic web sling?
Loads that may be too hot or abrasive for synthetic webbings yet require the wide bearing surface of a web belt.
What should you do if a sling is worn and cut?
Tag it, so that it will not be used by another worker and notify your supervisor about your decision.
What is a purpose of a bridle hitch?
When loads have a suitable attachment, it is used to keep the load stable, as long as the attachment points are above the load’s center of gravity.
When several ropes are to be attached to a single hook make the connection to the hook using:
A shackle.
20%
How much the installed cable clips will reduce the breaking strength of a wire rope by.
What is the main difference between a crane and a hoist?
A crane can lift and move objects, while a hoist can lift objects up and down only.
Tower cranes are most common on what kind of job site?
High-Rise.
Normally operated from ground level, they are designed to self-assemble by unfolding and/or telescoping up.
Self-erecting cranes.
They can be driven on roads, some of them are designed for rough terrain off-road travel and have large wheels and steering capability in both front and rear axles.
What is a mobile crane?
Used as a deliver truck to off-load materials such as lifts of lumber and sheet goods, trusses and gypsum board.
What is a boom truck?
A frame structure, that runs on a trolley on rails. They are mainly used in factories.
What is an overhead gantry crane?
Much like a forklift, has a telescopic boom with an articulating point. Although pallet forks are most common, can be fitted with many other types of attachments including buckets and winches.
What is a telehandler?
A type of roofing hoist designed to lift materials up a ladder. Ladder heights are normally about 28 feet and 44 feet. Lifting capacity commonly ranges between 200 and 500 lb. The lifting is cable powered by a small gasoline engine.
What is a power ladder?
Used either by a wire rope or chain, worked by moving a ratchet lever.
What is a come-along?
This kind of pulling device is equipped with wire rope, and especially designed for a certain brand of wire rope.
Tirfor jack.
Tower mast, jib operation arm and counter jib.
What are the three main parts of a tower crane?
A crane or hoist must only be operated by a qualified person who has been instructed to operate the equipment.
What does WorkSafeBC require in regards to hoisting operations.
When a power line is over 250,000 Volts, how far should you stay away?
20 feet or 6 m.
Where must you position the lifting hook of a sling when lifting a heavy object?
The position of the hook should be directly above the center of gravity.
When using a double basket sling, where must you make sure the center of gravity is located?
When using a double basket sling, you must make sure the center of gravity is between both the slings.
It is used to control a load, allowing you to control the load from a safe distance, should the load drop or shift, you will be out of danger.
What is a tag line?
What is the preferred type of rope for a tag line, in order to not conduct electricity?
Polypropylene is the preferred tagline for a tag line.
What would be best used when you need to maneuver trusses onto a structure?
Using a spreader bar and two tag lines.
What does the term dog everything mean?
The crane operator must lock all the crane functions at this signal.
When are construction material hoists used?
Construction material hoists are used on much larger construction projects where the amount of material to be moved is warranted by the installation of the hoist. A registered professional engineer must inspect the material hoists prior to the first lift of the materials.
When the use of audible or visual signals is hazardous or impractical, what must be used instead?
Two-way radio or other audio or video systems must be used.
What must be done if a load, being lifted, accidentally comes in contact with a boom of a crane?
The crane must be inspected.
What is the minimum clearance while working around a 100,000 volt power line?
10 feet.
What is a way to describe the center of gravity?
The point of balance.
What kind of rope conducts electricity when it gets wet?
Nylon.
Where should a tagline be attached to a long load?
Near the end of a load.
What should be done with slings prior to lifting loose bundles of round stock?
They should be double wrapped.
Should you ever wrap a sling on a lifting hook to prevent movement?
No, this will weaken the sling considerably and may even render it useless.
When a structural load attached to a sling has sharp edges that can damage the sling, what should be done?
To prevent damaging the slings, always provide padding between the slings and the sharp corners of the load.
What type of gloves are not considered safe for handling materials?
Gauntlet type gloves.
What do you need to use when rigging loose bundles of round stock?
Double-wrapped basket hitches.
When lifting with a sling, you must make sure that the sling is long enough so that the angle formed by the sling from the horizontal is always greater than?
60 degrees - the minimum.
Tirfor jacks and come-along are used to straight and lift walls, True or False?
True
How should an inspection log be maintained for New rigging components?
Each year, they should be inspected against the original measurements for wear and distortion. An inspection log must be maintained.
