1
GATE ME 1998
+2
-0.6
The isentropic heat drop in the nozzle of an impulse steam turbine with a nozzle efficiency $$0.9,$$ blade velocity ratio $$0.5,$$ and mean blade velocity $$150$$ $$m/s$$ in $$kJ/kg$$ is
A
$$50$$
B
$$40$$
C
$$60$$
D
$$75$$
2
GATE ME 1997
+2
-0.6
Consider an actual regenerative Rankine cycle with one open feed water heater. For each $$kg$$ steam entering the turbine, if $$m$$ $$kg$$ steam with a specific enthalpy of $${h_1}$$ is bled from the turbine, and the specific enthalpy of liquid water entering the heater is $${h_2},$$ then $${h_3},$$ the specific enthalpy of saturated liquid leaving the heater is equal to
A
$$m{h_1} - \left( {{h_2} - {h_1}} \right)$$
B
$${h_1} - m\left( {{h_2} - {h_1}} \right)$$
C
$${h_2} - m\left( {{h_2} - {h_1}} \right)$$
D
$$m{h_2} - \left( {{h_2} - {h_1}} \right)$$
3
GATE ME 1997
+2
-0.6
The following data pertain to a single stage impulse steam turbine:
Nozzle angle $$=$$ $${20^ \circ };$$
Blade velocity $$= 200$$ $$m/s;$$
Relative steam velocity at entry $$= 350$$ $$m/s;$$
Blade inlet $$30;$$
Blade exit angle $$= {25^ \circ }.$$

If blade friction is neglected, the work done per $$kg$$ steam is

A
$$124$$ $$kJ$$
B
$$164$$ $$kJ$$
C
$$169$$ $$kJ$$
D
$$174$$ $$kJ$$
4
GATE ME 1997
Subjective
+2
-0
Match the following
GATE ME Subjects
EXAM MAP
Medical
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