GATE ME

Rankine Cycle

Thermodynamics

(Past Years Questions)

Marks 1

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The INCORRECT statement about regeneration in vapor power cycle is that
GATE ME 2016 Set 1
Which of the following statements regarding a Rankine cycle with reheating are TRUE? (i) increase in average temperature...
GATE ME 2015 Set 2
In a power plant, water (density $$ = 1000\,\,kg/{m^3}$$ ) is pumped from $$80$$ $$kPa$$ to $$3$$ $$MPa$$. The pump has ...
GATE ME 2014 Set 1
In a Rankine cycle, regeneration results in higher efficiency because
GATE ME 2003
Considering the variation of static pressure and absolute velocity in an impulse stream turbine, across one row of movin...
GATE ME 2003
The Rateau turbine belongs to the category of
GATE ME 2001
Which of the following is a pressure compounded turbine?
GATE ME 2000
If $$\,\,{V_N}\,\,$$ and $$\alpha $$ are the nozzle exit velocity and nozzle angle in an impulse turbine, the optimum bl...
GATE ME 1998
A Curtis stage, Rateau stage and a $$50$$% reaction stage in a steam turbine are examples of
GATE ME 1998
Which among the following is the boiler mounting?
GATE ME 1997
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 ...
GATE ME 1995
For a given set of operating pressure limits of a Rankine cycle, the highest efficiency occurs for
GATE ME 1994
For a single stage impulse turbine with rotor diameter of $$2$$ $$m$$ and a speed of $$3000$$ $$rpm$$ when the nozzle an...
GATE ME 1994

Marks 2

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In the Rankine cycle for a system power plant the turbine entry and exit enthalpies are $$2803$$ $$kJ/kg$$ and $$1800$$ ...
GATE ME 2017 Set 2
In a steam power plant operating on an ideal Rankine cycle, super-heated steam enters the turbine at $$3$$ $$MPa$$ and $...
GATE ME 2016 Set 1
In a Rankine cycle, the enthalpies at turbine entry and outlet are $$3159$$ $$kJ/kg$$ and $$2187$$ $$kJ/kg$$ respectivel...
GATE ME 2015 Set 2
Steam enters a well insulated turbine and expands isentropically throughout. At an intermediate pressure, $$20$$ percent...
GATE ME 2015 Set 1
Steam with specific enthalpy $$\left( h \right)\,\,3214\,\,kJ/kg$$ enters an adiabatic turbine operating at steady state...
GATE ME 2014 Set 4
At the inlet of an axial impulse turbine rotor, the blade linear speed is 25 m/s, the magnitude of absolute velocity is ...
GATE ME 2014 Set 3
Steam at a velocity of $$10$$ $$m/s$$ enters the impulse turbine stage with symmetrical blading having blade angle $${30...
GATE ME 2014 Set 2
An ideal reheat Rankine cycle operates between the pressure limits of $$10$$ $$kPa$$ and $$8$$ $$MPa,$$ with reheat bein...
GATE ME 2014 Set 1
The values of enthalpy of steam at the inlet and outlet of a steam turbine in a Rankine cycle are $$2800$$ $$kJ/kg$$ and...
GATE ME 2011
In a steam power plant operating on the Rankine cycle, steam enters the turbine at $$4$$ $$MPa,$$ $${350^ \circ }C$$ and...
GATE ME 2010
In a steam power plant operating on the Rankine cycle, steam enters the turbine at $$4$$ $$MPa,$$ $${350^ \circ }C$$ and...
GATE ME 2010
The inlet and the outlet conditions of steam for an adiabatic steam turbine are as indicated in the figure. The notation...
GATE ME 2009
The inlet and the outlet conditions of steam for an adiabatic steam turbine are as indicated in the figure. The notation...
GATE ME 2009
A thermal power plant operates on a regenerative cycle with a single open feed water heater, as shown in the figure. For...
GATE ME 2008
Which combination of the following statements is correct? The incorporation of re-heater in a steam power plant. $$P:$$ ...
GATE ME 2007
Determine the correctness or otherwise of the following Assertion $$(a)$$ and the Reason$$(r).$$ Assertion(A): In a pow...
GATE ME 2006
Assertion (A): Condenser is an essential equipment in a steam power plant. Reason(R): For the same mass flow rate and t...
GATE ME 2006
In the velocity diagram shown below, $$u=$$ blade velocity, $$C=$$ absolute fluid velocity and $$W = $$ relative veloci...
GATE ME 2005
Consider a steam power plant using a reheat cycle as shown. Steam leaves the boiler and enters the turbine at $$4$$ $$MP...
GATE ME 2004
Consider a steam power plant using a reheat cycle as shown. Steam leaves the boiler and enters the turbine at $$4$$ $$MP...
GATE ME 2004
Match the following ...
GATE ME 2003
The efficiency of superheat Rankine cycle is higher than that of simple Rankine cycle because
GATE ME 2002
For a compressible fluid, sonic velocity is
GATE ME 2000
The isentropic heat drop in the nozzle of an impulse steam turbine with a nozzle efficiency $$0.9,$$ blade velocity rati...
GATE ME 1998
The following data pertain to a single stage impulse steam turbine: Nozzle angle $$=$$ $${20^ \circ };$$ Blade velocity...
GATE ME 1997
Consider an actual regenerative Rankine cycle with one open feed water heater. For each $$kg$$ steam entering the turbin...
GATE ME 1997
Match the following ...
GATE ME 1997
A steam plant has the boiler efficiency of $$92\% $$, turbine efficiency (mechanical) of $$94\% $$, generator efficiency...
GATE ME 1996
The equivalent evaporation $$(kg/hr)$$ of a boiler producing $$2000$$ $$kg/hr$$ of steam with enthalpy content of $$2426...
GATE ME 1993
Subsonic and supersonic diffusers have the following geometry:
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
A steam turbine operating with less moisture is ____________ (more/less) efficient and ________ (less/more) prone to bla...
GATE ME 1992
In a Rankine cycle heat is added
GATE ME 1991
Velocity compounded steam turbine known as ___________ (Curtis / Rateau ) turbine uses the principle of converting entir...
GATE ME 1991
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 1990
A economizer in a steam generator performs the function of
GATE ME 1989
The fundamental objective of employing the condenser in a steam power plant is to (reducce / increase ) the ____________...
GATE ME 1989

Marks 5

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Stream at $$300$$ $$kPa$$ and $${500^ \circ }C\,\,\left( {h = 3486.0\,\,kJ/kg} \right)$$ enters a steam turbine and exit...
GATE ME 2001
A simple impulse turbine expands steam frictionlessly from $$12$$ bar, $${250^0}C$$ with an enthalpy of $$2935$$ $$kJ/kg...
GATE ME 2000
An adiabatic steam turbine receives dry saturated steam at $$1.0\,\,\,MN/{m^2}$$ and discharges it $$0.1\,\,\,MN/{m^2}.$...
GATE ME 1999
A Rankine cycle operates between pressures of $$80$$ bar and $$0.1$$ bar. The maximum cycle temperature is $${600^ \circ...
GATE ME 1998
Dry saturated steam enters a friction-less adiabatic nozzle with negligible velocity at a temperature of $${300^ \circ }...
GATE ME 1995
In a single stage single row impulse turbine, the steam is entering at a velocity of $$1200$$ $$m/s$$ with a nozzle angl...
GATE ME 1993
In a steam power plant operating with simple Rankine cycle, the turbine is fed with steam at $$100$$ bar and $$673$$ $$K...
GATE ME 1992
In a single heater regenerative cycle, steam enters the turbine at $$30$$ bar, $${300^0}C$$ and condenser pressure is $$...
GATE ME 1991
A power station produces $$500$$ $$MW$$ of power. Assuming a plant thermal efficiency of $$33.3$$ percent, calculate the...
GATE ME 1990
The layout of a steam power plant working on the Rankine Cycle with single stage regeneration is shown in figure. Assumi...
GATE ME 1989

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