Question

“Pitch of a propeller”, Here what does pitch refer to?

(a) Advance per resolution

(b) Advance per rotation

(c) Advance per Sharpness

(d) Advance per revolution

I got this question in an online interview.

The question is from Mixing in chapter Fluid Flow and Mixing of Bioprocess Engineering

Answer 1

The correct answer is:

(d) Advance per revolution

Explanation:

In the context of a propeller, the "pitch" refers to the distance a propeller would move forward in one complete revolution if it were moving through a solid medium like a screw through wood. Therefore, pitch is essentially the advance per revolution of the propeller. This term describes the forward movement made by the propeller in one turn, akin to how a screw moves forward with each turn.

• (a) Advance per resolution and (b) Advance per rotation are incorrect as they don't align with the standard definition of propeller pitch.
• (c) Advance per sharpness is unrelated to propeller mechanics and does not fit the context.

Thus, advance per revolution is the correct description of propeller pitch.