If a crane has a line pull of 8,000 lbs and needs to lift a net load of 36,400 lbs, how many parts of line are required?

To determine the number of parts of line required for the crane to lift a net load of 36,400 lbs with a line pull capacity of 8,000 lbs, you can use the following principle: the total load being lifted must be divided by the line pull capacity to ascertain how many parts of line are necessary to safely and effectively lift the load.

In this case, you take the total load (36,400 lbs) and divide it by the line pull capacity (8,000 lbs):

36,400 lbs ÷ 8,000 lbs = 4.55

Since you cannot have a fraction of a part of line, and you must round up to the next whole number in order to ensure you can safely lift the load, you will need 5 parts of line. This ensures that the load will be effectively balanced and within the lifting capacity of the crane, maintaining safety standards while performing the lift.

Therefore, understanding the calculation reveals that option B, indicating 5 parts of line, is indeed the correct answer as it guarantees the crane can lift the specified load without exceeding its line pull capacity.