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1. |
_ For a Parson's reaction turbine, if α₁ and α₂ are fixed blade angles at inlet and exit respectively and β₁ and β₂ are the moving blade angles at entrance and exit respectively, then$? |
A. | α₁ = α₂ and β₁ = β₂ |
B. | α₁ = β₁ and α₂= β₂ |
C. | α₁ < β₁ and α₂ > β₂ |
D. | α₁ = β₂ and β₁ = α₂ |
Answer» C. ≈í¬±‚Äö√á√Ö < ≈í‚â§‚Äö√á√Ö and ≈í¬±‚Äö√á√á > ≈í‚â§‚Äö√á√á | |