What are the three power sources for a capstan hoist?

The correct answer identifies the three power sources for a capstan hoist as electric, gas, and hydronic power.

Capstan hoists are versatile and can be powered in various ways depending on the application and environment. Electric power is commonly used due to its efficiency and ease of control, making it suitable for consistent operations. Gas power allows for mobility and versatility in locations where electrical outlets may not be readily available. Hydronic power, which typically involves the use of hydraulic fluid to transfer force, provides a significant mechanical advantage and is also widely used in heavy lifting applications.

The other options do not accurately represent the power sources relevant to a capstan hoist. Wind and solar power, while innovative, are not conventional choices for a capstan hoist. Battery power is typically less common in large-scale applications like hoisting due to potential limitations in power output and duration. Finally, while natural gas and diesel are indeed power sources, hydroelectric power is generally not applicable to a mobile hoist system. Thus, the combination of electric, gas, and hydronic power sources is ideal for the functionality of a capstan hoist.