USCG Boat Crew Member Training 2025 – 400 Free Practice Questions to Pass the Exam

The correct choice is based on the fundamental principle of propeller mechanics. The term "pitch" refers specifically to the distance that a propeller would theoretically advance in one complete revolution if there were no slippage. It is a crucial concept in understanding how propellers generate thrust and move vessels through the water.

In practical terms, the pitch is analogous to the way a screw moves forward when rotated; the distance that a propeller would travel forward in water after a single revolution is defined as its pitch. This measure is important for calculating the performance of a vessel and ensuring that the propeller is matched appropriately to the engine and the vessel's intended use. Understanding the pitch can aid in optimizing speed and efficiency, which are vital considerations in marine operations.

The other terms mentioned in the alternative choices do not relate to the defined measurement of propeller advancement in the same context. Therefore, "pitch" and "one" revolution clearly align with the mechanics of propulsion and the principles that govern propeller design and function.