1
GATE ME 1992
MCQ (Single Correct Answer)
+2
-0.6
Subsonic and supersonic diffusers have the following geometry:
A
Divergent and convergent respectively
B
Both divergent
C
Both convergent
D
Convergent and divergent respectively
2
GATE ME 1992
Fill in the Blanks
+2
-0
A steam turbine operating with less moisture is ____________ (more/less) efficient and ________ (less/more) prone to blade damage.
3
GATE ME 1992
Subjective
+5
-0
In a steam power plant operating with simple Rankine cycle, the turbine is fed with steam at $$100$$ bar and $$673$$ $$K.$$ Determine the actual enthalpy and quality of the steam extracted at $$14$$ bar if the turbine stage efficiency is $$90$$ percent.
4
GATE ME 1992
Subjective
+5
-0
A Hydro turbine is required to give $$25$$ $$MW$$ at $$50$$ $$m$$ head and $$90$$ $$rpm$$ runner speed. The laboratory facilities available, permit testing of $$20$$ $$kW$$ models at $$5$$ $$m$$ head. What should be the model runner speed and model to prototype scale ratio?
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