What comprises one compressor stage?

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Multiple Choice

What comprises one compressor stage?

Explanation:
The key idea is that a compressor stage includes a rotating blade row (the rotor) and a stationary blade row (the stator) that follows it. The rotor blades accelerate the air, and the stator blades straighten the flow and convert that energy into a higher pressure. Together, one rotor and one stator form a complete stage, with each additional stage adding another rotor–stator pair. Having two rotors or two stators without the matching counterpart would not produce a single stage’s energy transfer. So the correct description is one rotor plus one stator.

The key idea is that a compressor stage includes a rotating blade row (the rotor) and a stationary blade row (the stator) that follows it. The rotor blades accelerate the air, and the stator blades straighten the flow and convert that energy into a higher pressure. Together, one rotor and one stator form a complete stage, with each additional stage adding another rotor–stator pair. Having two rotors or two stators without the matching counterpart would not produce a single stage’s energy transfer. So the correct description is one rotor plus one stator.

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