Term
| How much stronger is IWRC than Fiber core? |
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Definition
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Term
| Most common grade of wire rope? |
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Definition
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Term
| What is the difference between Lang and Regular Lay? |
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Definition
Lang Lay - strands go the same way as the wire
Regular Lay - strands opposite of wire |
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Term
| How does rotational resistant rope work? |
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Definition
| inner core has opposite direction lay as outer. |
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Term
| Most common classification of wire rope? |
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Definition
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Term
| Safety Factors for: Personnel Basket, Rigging, hoist lines, chains, rotational resistant, pendant lines standing, pendant lines horizontal |
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Definition
Personnel Basket - 10:1
Rigging - 5:1
Running lines - 3.5:1
Chains - 4:1
Rotational Resistant - 5:1
Pendant lines standing - 3:1
Pendant lines horizontal - 2.5:1 |
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Term
| How many clips are required for seizing? |
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Definition
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Term
| How much spacing is required for wire rope clips? |
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Definition
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Term
| How much wear can shackles have before replacement is necessary? |
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Definition
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Term
| How much distortion can hooks have before replacement is required? |
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Definition
| zero, there is no tolerance. |
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Term
| Replacement Criteria for running ropes? |
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Definition
6 or more broken wires in one lay length,
3 or more broken wires in one strand in one lay length. |
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Term
| Replacement Criteria for standing ropes? |
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Definition
more than 1 broken wire going into an end fitting,
3 or more broken wires in one lay length |
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Term
| Replacement criteria for rotation resistant rope? |
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Definition
| 2 broken wires in 6 rope diameters or 4 broken wires in 30 diameters. |
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Term
| What is the efficiency of a wedge socket? |
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Definition
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Term
| What is the number one cause of crane accidents? |
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Definition
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Term
| How much wire rope contact must rest on softeners? |
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Definition
| 7 times the rope diameter |
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Term
| How much stronger is IWRC than Fiber core? |
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Definition
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Term
| At what loss must a wire rope be replaced? |
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Definition
| 1/3 wear or 7% or more of nominal rope diameter. |
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Term
| What can lack of lubrication can cause? |
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Definition
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Term
| What must be used to lubricate wire rope? |
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Definition
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Term
| What causes crushed strands? |
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Definition
| too many layers or cross winding |
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Term
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Definition
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Term
| What is the 1/2/3 seizing rule? |
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Definition
Length = 1-1 /12 x rope dia.
Spacing = 2 rope dia.
# of seizings = 3 rope dia. to next whole number |
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Term
| What must the reel do when re spooling drum? |
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Definition
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Term
IWRC breaking strength?
Fibre breaking strength? |
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Definition
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Term
| what is the nylon stretch factor? |
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Definition
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Term
| How efficient are shackles at A. 0*, B. 45*, C. 90* |
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Definition
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Term
| Re commended safe lifting angle? |
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Definition
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Term
| Slings must not exceed what angle on a hook? |
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Definition
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Term
| What are spreader/equalizer bars tested to? |
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Definition
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Term
| The rope in a sheave must be supported by what amount? |
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Definition
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Term
| Sheaves must be at least how big? |
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Definition
| 20 times the rope diameter |
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Term
| Snatch blocks are not to be used for hoisting. T/F? |
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Definition
| True. Snatch blocks are only used to change the direction of the rope. |
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Term
| What are the max. Fleet angles on A. Grooved drums, B. Smooth Drums. |
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Definition
A. Grooved - 2*
B. Smooth - 1.5 * |
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Term
| How big should the flange be for A. Grooved drums, B. Smooth Drums |
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Definition
A. Grooved - 2' or 2 times rope dia.
B. Smooth - 2.5' or 2.5 times rope dia. |
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Term
| At what % wear must chains be replaced? % Stretch? |
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Definition
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Term
| Rule of thumb for chains? |
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Definition
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Term
| What are come-alongside tested to? |
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Definition
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Term
| How do wire classifications work? |
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Definition
| number of strands x number of wires in strand |
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Term
| If the rope is more flexible but less resistant to abrasion, it has more or less wires per strand? |
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Definition
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Term
| What is meant by preforming? |
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Definition
| wires are 'pre-bent' by the manufacturer |
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Term
| What does core slippage cause? |
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Definition
| more of the load to rest on a particular layer |
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Term
| How do you measure wire rope? |
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Definition
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Term
| When installing rope from reel to drum you can go from Top to Bottom. T/F |
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Definition
| False. Must go top to top or bottom to bottom. |
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Term
| Regent ion criteria for non-rotation rope? |
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Definition
| 2 wires in 6 diameters or 4 wires in 30 rope diameters. |
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Term
| How do you determine lay length? |
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Definition
| the length it takes a strand to do one full rotation. |
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Term
| Unknown core rope breaking strength? |
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Definition
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Term
| At what percent wear must shackles be removed from service? |
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Definition
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Term
| The maximum pull of the hoist occurs on what layer? |
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Definition
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Term
| How many wraps must be left on the drum at all times? |
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Definition
| minimum of 5 wraps or manufacturers specification. |
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Term
| What are the 4 levels of field factors? |
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Definition
svc x 2 - 90*
Svc x 1.7 - 89* - 60*
Svc x 1.4 - 59* - 45*
Svc x 1 - 44* - 30* |
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Term
| Aluminium is aloud for sheaves. T/F? |
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Definition
| false. Sheaves must not be made of aluminum. |
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Term
| What material must hooks be made of? |
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Definition
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Term
| Chain sounds must be what alloy? |
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Definition
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Term
115/125 grade is how much stronger than 110/120?
120/130 grade is how much stronger than 115/125 |
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Definition
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Term
| How many wires in a 6 x 19 wire rope? |
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Definition
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Term
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Definition
| Has large wires, not very flexible but very abrasion resistant. Used as guy lines, ski tows and tramways. |
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Term
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Definition
| has the most diverse use. Good combination of flexibility and abrasion resistance. Usually seals regular lay. |
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Term
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Definition
| 31 to 49 wires per strand. Most flexible but prone to crushing on multi-layered drums. Used for high speed cranes, draglines or and power shovels. |
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Term
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Definition
| more flexible than 6 strand but crushes and distorts easy. Usually on high speed hoists and tower cranes. |
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Term
| When hoisting a bundle of pipe, which hitch is best for max. contact between sling and load? |
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Definition
| 2 leg double wrap chokers. |
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Term
| Which way should the shackle be placed in the hook |
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Definition
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Term
| When non-rotating rope is being used with a wedge socket, there is a high possibility of... |
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Definition
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Term
| Which core is better for high temperature operations? |
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Definition
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Term
| What is the only type of natural Fiber rope used in construction? |
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Definition
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Term
| What is the breaking strength of 1' diameter grade one manilla? |
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Definition
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Term
| 4 other types of natural Fiber rope other than manilla |
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Definition
Hemp - Strongest of the natural fibers
Sisal - 75% of hemp
Coir - made from coconut husk (1/4 strength of hemp)
Cotton - 60% as strong as hemo |
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Term
| What is the strongest synthetic rope? |
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Definition
| nylon, other than Kevlar type. |
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Term
| What are some characteristics of Polyester |
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Definition
| 2 times stronger than manilla, not as strong as nylon but has less stretch. Recommended when minimum stretch, High strength and durability needed. |
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Term
| What is the lightest, most economical and whiskey used synthetic rope? |
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Definition
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Term
| How strong is polyethylene compared to nylon? |
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Definition
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Term
| What must chain slings have on their ID tag? |
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Definition
A. Name or trademark of manufacturer
B. Grade
C. Nominal chain size
D. Number or legs
E. Rated load for at least one hitch type and the angle it's based on
F. Length
Go individual sling identification (ex. serial numbers) |
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Term
| At what percent stretch must chains be taken out of service? |
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Definition
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Term
| What must be present on repaired chains? |
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Definition
| the repairing companies identity |
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Term
| What are the two types of cable clips? |
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Definition
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Term
| How efficient are cable clips? |
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Definition
| 80%, as low as 40 if installed incorrectly |
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Term
| You must never connect two straight wire rope lengths with cable clips. T/F |
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Definition
| true, if necessary two eyes must be created and connected. |
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Term
| ____ are permanent distortions on a wire rope and cannot be repaired? |
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Definition
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Term
| Synthetic Fiber rope sling tags must contain what? |
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Definition
manufacturer name and date or trademark
Code or stricken number
Safe working load for the types of hitches permitted
The type and material of construction |
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Term
| Breaking strength for galvanized wire rope |
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Definition
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Term
| Knots reduce rope strength by how much |
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Definition
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Term
| How long should wedge socket tail lengths be? |
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Definition
6-8 rope diameter, min of 6''
20 rope diameters but no less than 6" for non-rotational |
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Term
| Only shouldered eye bolts can be used for lifting. T/F |
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Definition
| true, shoulder-less must never be used for hoisting |
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Term
| Lang lay advantage/disadvantage |
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Definition
advantage - resistant to abrasion
Disadvantage - can unravel easier |
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Term
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Definition
| triangle end fittings that have a slot for choking |
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Term
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Definition
| triangle fitting on both ends with no slot for showing. Straight pull or basket only. |
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Term
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Definition
| flat eyes formed on either side. |
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Term
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Definition
| eyes on either side, angled rather than flat. Know as twisted eye sling |
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Term
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Definition
| endless sling. Sometimes known as a grommet |
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Term
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Definition
| return/reversed eye sling. multiple widths of webbing held edge to edge. |
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Term
| If a wire rope is not used win thin a month it should be inspected before next use. T/F |
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Definition
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Term
|
Definition
| 10 broken wires in one rope lay or 5 broken wires in one strand in one lay |
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