Question 52General Subjects - QMED

The correct answer is C) compress air. The device shown in the illustration is commonly used to compress air. This is a critical function on many types of vessels, as compressed air is used for a variety of purposes such as operating pneumatic tools, starting diesel engines, and charging air tanks. The other answer choices are incorrect because the device is not used to pump refrigerant (A), generate electricity (B), or pump heavy liquids (D). Those functions are typically handled by other specialized equipment onboard a vessel.