MASS Load Charts and Capacity 2

Question 1

On a mobile crane load chart, what does the term 'gross capacity' represent?

Accepted Answer

The total rated lift before deducting the weight of rigging and load-handling devices

Answer

Gross capacity is the chart value before subtracting rigging, hook block, and other load-handling device weights.

Question 2

To find the net capacity for a lift, what must be subtracted from the gross capacity?

Accepted Answer

The weight of the hook block, rigging, and any load-handling devices

Answer

Net capacity equals gross capacity minus the weight of the hook block, slings, and other load-handling devices.

Question 3

Which two factors are typically used together to locate a rated capacity on a load chart?

Accepted Answer

Load radius and boom length

Answer

Most capacity values are read at the intersection of the load radius and the boom length on the chart.

Question 4

As the load radius increases on a mobile crane, the rated capacity generally:

Accepted Answer

Decreases

Answer

Capacity drops as the load moves farther from the center of rotation because leverage on the crane increases.

Question 5

What does a bold line or shaded area on a load chart commonly indicate?

Accepted Answer

The point where the limitation changes from structural strength to stability (tipping)

Answer

The line separates capacities limited by structural strength from those limited by stability/tipping.

MASS Test Practice Test