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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

Remove from service any portion of a lifting chain that is worn:

10% of the original diameter

What is the maximum safe working load for alloy steel lifting chain that is 7/8 inch thick?

28750 lbs

What is one of fibre ropes main uses in industry

Safety lines/tag lines

What is the safe working load for 5/8 inch nylon rope?

2000lbs

The type of knot or Bend used for typing two ropes of different diameters together is the

Sheet bend

What is the percentage of rope strength when a hitch is used

75%

When estimating the weight of material, what percentage of safe load weight is added

12%

Where is the lifting capacity marked on a chain hoist

On the hoist

What are the common rated capacities for electric chain hoists

1/4-5 tonnes

Tirfors are best used for:

Moving heavy equipment across the floors

How many types of hydraulic jacks are there? Name them.

2, porta power and bottle jack

Tuggers are used for:

Hoisting, lowering and pulling loads

When using hand signals, the operator and signalman must:

Agree on the various signals being used

What hand signal applies for boom up?

Close fist with thumb up

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

Which signal is used to extend boom

Make fists with outstretched thumbs and motions thumbs away from each other

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