Which of the following is an example of equipment powered by air compressors?

Pneumatic wrenches are a prime example of equipment powered by air compressors due to their reliance on compressed air to operate. These tools harness the energy from compressed air to generate rotational force, making them highly effective for tasks such as loosening or tightening bolts and nuts in various applications, particularly in automotive and industrial settings. The efficiency and power of pneumatic wrenches stem from the ability of air compressors to deliver a continuous supply of pressurized air, enabling these tools to perform at high torque levels without the need for electrical power or manual exertion.

In contrast, the other options, such as electric drills, gas generators, and battery-operated tools, rely on different power sources—electricity, fuel, and batteries, respectively—thus distinguishing them from tools powered by air compressors.