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18 Cards in this Set
- Front
- Back
Why is chain better suited for certain hoisting jobs than wire rope |
Chain is more resistant to abrasion and corrosion |
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Remove from service any portion of a lifting chain that is worn: |
10% of the original diameter |
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What is the maximum safe working load for alloy steel lifting chain that is 7/8 inch thick? |
28750 lbs |
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What is one of fibre ropes main uses in industry |
Safety lines/tag lines |
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What is the safe working load for 5/8 inch nylon rope? |
2000lbs |
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The type of knot or Bend used for typing two ropes of different diameters together is the |
Sheet bend |
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What is the percentage of rope strength when a hitch is used |
75% |
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When estimating the weight of material, what percentage of safe load weight is added |
12% |
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Where is the lifting capacity marked on a chain hoist |
On the hoist |
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What are the common rated capacities for electric chain hoists |
1/4-5 tonnes |
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Tirfors are best used for: |
Moving heavy equipment across the floors |
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How many types of hydraulic jacks are there? Name them. |
2, porta power and bottle jack |
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Tuggers are used for: |
Hoisting, lowering and pulling loads |
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When using hand signals, the operator and signalman must: |
Agree on the various signals being used |
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What hand signal applies for boom up? |
Close fist with thumb up |
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What signal is used for lower boom slowly? |
Arm out with palm up and open. Make a fist and point to palm with outstretched thumb |
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Which signal is used to extend boom |
Make fists with outstretched thumbs and motions thumbs away from each other |
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When hoisting equipment, what should a tag line or tag lines be used for |
To keep load from turning or to swivel load to avoid obstructions in the way |