1
GATE ME 1996
MCQ (Single Correct Answer)
+2
-0.6
A steam plant has the boiler efficiency of $$92\% $$, turbine efficiency (mechanical) of $$94\% $$, generator efficiency of $$92\% $$ and cycle efficiency of $$44\% $$. If $$6\% $$ of the generated power is used to run the auxiliaries, the overall plant efficiency is
A
$$34\% $$
B
$$39\% $$
C
$$45\% $$
D
$$30\% $$
2
GATE ME 1993
MCQ (Single Correct Answer)
+2
-0.6
The equivalent evaporation $$(kg/hr)$$ of a boiler producing $$2000$$ $$kg/hr$$ of steam with enthalpy content of $$2426$$ $$kJ/kg$$ from feed water at temperature $${40^ \circ }C$$ (liquid enthalpy $$=168$$ $$kJ/kg$$) is (Enthalpy of vaporization of water at $${100^0}C = 2258$$ $$kJ/kg$$).
A
$$2000$$
B
$$2149$$
C
$$186$$
D
$$1649$$
3
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.
4
GATE ME 1992
MCQ (Single Correct Answer)
+2
-0.6
Boiler rating is usually defined in terms of:
A
Maximum temperature of steam in Kelvin
B
Heat transfer rate in $$kJ/hr$$
C
Heat transfer area in metre2
D
Steam output in $$kg/hr$$
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Turbo Machinery
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