An Engine on a Test Stand Was Operated at Two

question 72

Multiple Choice

An engine on a test stand was operated at two fixed settings, each with an appropriate load. At the first setting, fuel consumption was 1 gal every 15 min. At the second setting, it was 1 gal every 20 min. The test took 10 h, and 37 gal of fuel were used. How long did the engine run at each setting?

• A) The engine ran for 7 h at the first setting,
• The engine ran for 3 h at the second setting.
• B) The engine ran for 3 h at the first setting,
• The engine ran for 7 h at the second setting.
• C) The engine ran for 7.5 h at the first setting,
• The engine ran for 2.5 h at the second setting.
• D) The engine ran for 4 h at the first setting,
• The engine ran for 6 h at the second setting.
• E) The engine ran for 6 h at the first setting,
• The engine ran for 4 h at the second setting.

---

Definitions:

Firm

A business organization, such as a corporation, partnership, or sole proprietorship, that sells goods or services.

Pure Competition

A market setup where numerous small companies manufacture the same products without any one of them having the power to affect the market pricing.

Market Models

Theoretical frameworks that describe how different market structures operate, including competition levels and price setting.

Market Structures

Describes the classification of markets based on the number of firms, the type of products offered, and the level of competition, including perfect competition, monopolistic competition, oligopoly, and monopoly.