MASS Load Charts and Capacity 4

Question 1

A load chart shows a gross capacity of 20,000 lbs at the working radius. The hook block weighs 500 lbs and rigging weighs 300 lbs. What is the net capacity available for the load?

Accepted Answer

19,200 lbs

Answer

20,000 lbs

Answer

20,800 lbs

Answer

18,500 lbs

Question 2

A lift requires picking a 15,000 lb load. With deductions the net capacity is 16,000 lbs. The load utilization is closest to:

Accepted Answer

About 94%

Answer

About 50%

Answer

About 107%

Answer

About 75%

Question 3

If a load weighs more than the net capacity at the current radius, the operator should first try to:

Accepted Answer

Reduce the radius by booming up so a higher capacity column applies

Answer

Boom down to a longer radius

Answer

Add the load anyway

Answer

Disable the load moment indicator

Question 4

A crane is rated at 30,000 lbs at 10 ft radius and 12,000 lbs at 30 ft radius. This illustrates that capacity is most sensitive to:

Accepted Answer

Changes in load radius

Answer

Cab temperature

Answer

Operator experience

Answer

Paint condition

Question 5

When two chart values bracket your actual radius (e.g., your radius falls between listed 25 ft and 30 ft rows), you should:

Accepted Answer

Use the capacity for the next larger (longer) radius

Answer

Average the two values

Answer

Use the shorter radius value

Answer

Pick whichever is higher

Question 6

A load handling device weight of 800 lbs is forgotten in the calculation. The likely consequence is that the operator:

Accepted Answer

Underestimates the true load and may exceed rated capacity

Answer

Has extra unused capacity

Answer

Improves crane stability

Answer

Reduces wind effect

Question 7

A wire-rope load line on a multiple-part reeving system shares the load across the parts. Increasing the parts of line primarily:

Accepted Answer

Increases the lifting capacity of the hoist line

Answer

Increases boom length

Answer

Reduces counterweight needs

Answer

Changes the load radius