The Accompanying Figure Shows an Assortment of Mechanical Symbols

question 11

Multiple Choice

The accompanying figure shows an assortment of mechanical symbols. What is the third symbol from the top?

• A) Diaphragm valve
• B) Angle globe valve
• C) Ball valve
• D) Butterfly valve

---

Definitions:

Herfindahl-Hirschman Index

A measure used to determine the level of concentration in a market, calculated by summing the squares of the market share percentages of all firms within the industry.

Antitrust Division

A government division responsible for enforcing laws to promote competition and prevent monopolies and other activities that restrain trade.

Moderately Concentrated

Describes an industry structure where a few firms occupy a significant portion of the market share but not to the extent of creating a monopoly or oligopoly.

Pure Monopoly

An industry with a single firm that produces a product for which there are no close substitutes and in which significant barriers to entry prevent other firms from entering the industry to compete for profits.