Rankine Cycle · Thermodynamics · GATE ME

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Marks 1

GATE ME 2016 Set 1
The INCORRECT statement about regeneration in vapor power cycle is that
GATE ME 2015 Set 2
Which of the following statements regarding a Rankine cycle with reheating are TRUE? (i) increase in average temperature of heat addition (ii) reducti...
GATE ME 2014 Set 1
In a power plant, water (density $$ = 1000\,\,kg/{m^3}$$ ) is pumped from $$80$$ $$kPa$$ to $$3$$ $$MPa$$. The pump has an isentropic efficiency of $$...
GATE ME 2003
Considering the variation of static pressure and absolute velocity in an impulse stream turbine, across one row of moving blades
GATE ME 2003
In a Rankine cycle, regeneration results in higher efficiency because
GATE ME 2001
The Rateau turbine belongs to the category of
GATE ME 2000
Which of the following is a pressure compounded turbine?
GATE ME 1998
If $$\,\,{V_N}\,\,$$ and $$\alpha $$ are the nozzle exit velocity and nozzle angle in an impulse turbine, the optimum blade velocity is given by
GATE ME 1998
A Curtis stage, Rateau stage and a $$50$$% reaction stage in a steam turbine are examples of
GATE ME 1997
Which among the following is the boiler mounting?
GATE ME 1995
In adiabatic flow with friction, the stagnation temperature along a streamline ____________ (increase / remains constant)
GATE ME 1995
Consider a Rankine cycle with superheat. If the maximum pressure in the cycle is increased without changing the maximum temperature and the minimum pr...
GATE ME 1994
For a single stage impulse turbine with rotor diameter of $$2$$ $$m$$ and a speed of $$3000$$ $$rpm$$ when the nozzle angle is $${20^0},$$ the optimum...
GATE ME 1994
For a given set of operating pressure limits of a Rankine cycle, the highest efficiency occurs for

Marks 2

GATE ME 2017 Set 2
In the Rankine cycle for a system power plant the turbine entry and exit enthalpies are $$2803$$ $$kJ/kg$$ and $$1800$$ $$kJ/kg$$, respectively. The e...
GATE ME 2016 Set 1
In a steam power plant operating on an ideal Rankine cycle, super-heated steam enters the turbine at $$3$$ $$MPa$$ and $${350^ \circ }C.$$ The condens...
GATE ME 2015 Set 2
In a Rankine cycle, the enthalpies at turbine entry and outlet are $$3159$$ $$kJ/kg$$ and $$2187$$ $$kJ/kg$$ respectively. If the specific pump work i...
GATE ME 2015 Set 1
Steam enters a well insulated turbine and expands isentropically throughout. At an intermediate pressure, $$20$$ percent of the mass is extracted for ...
GATE ME 2014 Set 4
Steam with specific enthalpy $$\left( h \right)\,\,3214\,\,kJ/kg$$ enters an adiabatic turbine operating at steady state with a flow rate $$10kg/s.$$ ...
GATE ME 2014 Set 2
Steam at a velocity of $$10$$ $$m/s$$ enters the impulse turbine stage with symmetrical blading having blade angle $${30^ \circ }.$$ The enthalpy drop...
GATE ME 2014 Set 3
At the inlet of an axial impulse turbine rotor, the blade linear speed is 25 m/s, the magnitude of absolute velocity is 100 m/s and the angle between ...
GATE ME 2014 Set 1
An ideal reheat Rankine cycle operates between the pressure limits of $$10$$ $$kPa$$ and $$8$$ $$MPa,$$ with reheat being done at $$4$$ $$MPa.$$ The t...
GATE ME 2011
The values of enthalpy of steam at the inlet and outlet of a steam turbine in a Rankine cycle are $$2800$$ $$kJ/kg$$ and $$1800$$ $$kJ/kg$$ respective...
GATE ME 2010
In a steam power plant operating on the Rankine cycle, steam enters the turbine at $$4$$ $$MPa,$$ $${350^ \circ }C$$ and exits at a pressure of $$15$$...
GATE ME 2010
In a steam power plant operating on the Rankine cycle, steam enters the turbine at $$4$$ $$MPa,$$ $${350^ \circ }C$$ and exits at a pressure of $$15$$...
GATE ME 2009
The inlet and the outlet conditions of steam for an adiabatic steam turbine are as indicated in the figure. The notations are as usually followed. ...
GATE ME 2009
The inlet and the outlet conditions of steam for an adiabatic steam turbine are as indicated in the figure. The notations are as usually followed. ...
GATE ME 2008
A thermal power plant operates on a regenerative cycle with a single open feed water heater, as shown in the figure. For the state points shown, the s...
GATE ME 2007
Which combination of the following statements is correct? The incorporation of re-heater in a steam power plant. $$P:$$ always increases the thermal e...
GATE ME 2006
Determine the correctness or otherwise of the following Assertion $$(a)$$ and the Reason$$(r).$$ Assertion(A): In a power plant working on a Rankine ...
GATE ME 2006
Assertion (A): Condenser is an essential equipment in a steam power plant. Reason(R): For the same mass flow rate and the same pressure rise, a water...
GATE ME 2005
In the velocity diagram shown below, $$u=$$ blade velocity, $$C=$$ absolute fluid velocity and $$W = $$ relative velocity of fluid and the subscripts...
GATE ME 2004
Consider a steam power plant using a reheat cycle as shown. Steam leaves the boiler and enters the turbine at $$4$$ $$MPa,$$ $${350^ \circ }C$$ $$\lef...
GATE ME 2004
Consider a steam power plant using a reheat cycle as shown. Steam leaves the boiler and enters the turbine at $$4$$ $$MPa,$$ $${350^ \circ }C$$ $$\lef...
GATE ME 2003
Match the following ...
GATE ME 2002
The efficiency of superheat Rankine cycle is higher than that of simple Rankine cycle because
GATE ME 2000
For a compressible fluid, sonic velocity is
GATE ME 1998
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 velo...
GATE ME 1997
Consider an actual regenerative Rankine cycle with one open feed water heater. For each $$kg$$ steam entering the turbine, if $$m$$ $$kg$$ steam with ...
GATE ME 1997
The following data pertain to a single stage impulse steam turbine: Nozzle angle $$=$$ $${20^ \circ };$$ Blade velocity $$= 200$$ $$m/s;$$ Relative s...
GATE ME 1997
Match the following ...
GATE ME 1996
A steam plant has the boiler efficiency of $$92\% $$, turbine efficiency (mechanical) of $$94\% $$, generator efficiency of $$92\% $$ and cycle effici...
GATE ME 1993
The equivalent evaporation $$(kg/hr)$$ of a boiler producing $$2000$$ $$kg/hr$$ of steam with enthalpy content of $$2426$$ $$kJ/kg$$ from feed water a...
GATE ME 1992
Boiler rating is usually defined in terms of:
GATE ME 1992
In stream and other vapor cycles, the process of removing non-condensables is called
GATE ME 1992
Subsonic and supersonic diffusers have the following geometry:
GATE ME 1992
A steam turbine operating with less moisture is ____________ (more/less) efficient and ________ (less/more) prone to blade damage.
GATE ME 1991
In a Rankine cycle heat is added
GATE ME 1991
Velocity compounded steam turbine known as ___________ (Curtis / Rateau ) turbine uses the principle of converting entire __________ (pressure / veloc...
GATE ME 1990
In the Rankine cycle when super-heated steam is used:
GATE ME 1990
When initially dry and saturated steam flows through a nozzle, the ratio of actual discharge to calculated discharge is
GATE ME 1989
The fundamental objective of employing the condenser in a steam power plant is to (reducce / increase ) the ______________of steam
GATE ME 1989
A economizer in a steam generator performs the function of

Marks 5

GATE ME 2001
Stream at $$300$$ $$kPa$$ and $${500^ \circ }C\,\,\left( {h = 3486.0\,\,kJ/kg} \right)$$ enters a steam turbine and exits at atmospheric pressure and ...
GATE ME 2000
A simple impulse turbine expands steam frictionlessly from $$12$$ bar, $${250^0}C$$ with an enthalpy of $$2935$$ $$kJ/kg$$ to an enthalpy of $$2584$$ ...
GATE ME 1999
An adiabatic steam turbine receives dry saturated steam at $$1.0\,\,\,MN/{m^2}$$ and discharges it $$0.1\,\,\,MN/{m^2}.$$ The steam flow rate is $$3$$...
GATE ME 1998
A Rankine cycle operates between pressures of $$80$$ bar and $$0.1$$ bar. The maximum cycle temperature is $${600^ \circ }C.$$ If the steam turbine an...
GATE ME 1995
Dry saturated steam enters a friction-less adiabatic nozzle with negligible velocity at a temperature of $${300^ \circ }C.$$ It is expanded to a press...
GATE ME 1993
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 leav...
GATE ME 1992
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 entha...
GATE ME 1991
In a single heater regenerative cycle, steam enters the turbine at $$30$$ bar, $${300^0}C$$ and condenser pressure is $$0.096$$ bar. The feed water he...
GATE ME 1990
A power station produces $$500$$ $$MW$$ of power. Assuming a plant thermal efficiency of $$33.3$$ percent, calculate the rate of cooling water flow re...
GATE ME 1989
The layout of a steam power plant working on the Rankine Cycle with single stage regeneration is shown in figure. Assuming the exit stream from the re...
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