1
GATE ME 1993
+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
$$1649$$
2
GATE ME 1993
Subjective
+5
-0
In a single stage single row impulse turbine, the steam is entering at a velocity of $$1200$$ $$m/s$$ with a nozzle angle of $${20^ \circ }$$ and leaving the blade in the axial direction. The ratio of blade velocity to the tangential (whirl) velocity of steam is $$0.6.$$ Sketch the velocity diagram and calculate the work output.
3
GATE ME 1993
+2
-0.6
Cavitation in a hydraulic reaction turbine is most likely to occur at the turbine
A
Entry
B
Exit
C
Stator exit
D
Rotor exit
4
GATE ME 1993
+2
-0.6
Specific speed of a Kaplan turbine ranges between
A
$$30$$ to $$60$$
B
$$60$$ to $$300$$
C
$$300$$ to $$600$$
D
$$600$$ to $$1000$$
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