GATE ME

Heat Exchangers

Heat Transfer

(Past Years Questions)

Marks 1

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Saturated steam at $${100^ \circ }C$$ condenses on the outside of a tube. Cold fluid enters the tube at $${20^ \circ }C$...
GATE ME 2017 Set 1
For a heat exchanger, $$\Delta {T_{\max }}$$ is the maximum temperature difference and $$\Delta {T_{\min }}$$ is the min...
GATE ME 2016 Set 3
Saturated vapor is condensed to saturated liquid in a condenser. The heat capacity ratio is $${c_r} = {{{c_{\min }}} \ov...
GATE ME 2015 Set 3
In a heat exchanger, it is observed that $$\Delta {T_1} = \Delta {T_2},$$ where $$\Delta {T_1}$$ is the temperature diff...
GATE ME 2014 Set 2
In a condenser of a power plant, the steam condenses at a temperature of $${60^ \circ }C.$$ The cooling water enters at ...
GATE ME 2011
For the same inlet and outlet temperatures of hot and cold fluids, the Log mean temperature Difference $$(LMTD)$$ is
GATE ME 2002
The practice to use steam on the shell side and cooling water on the tube side in condensers of steam power plant is bec...
GATE ME 1994
In shell and tube heat exchanger, baffles are mainly used to
GATE ME 1991

Marks 2

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In a counter-flow heat exchanger, water is heated at the rate of $$1.5kg/s$$ from $$\,40{}^ \circ C\,$$ to $$\,80{}^ \ci...
GATE ME 2017 Set 2
Consider a parallel-flow heat exchanger with area $${A_p}$$ and a counter-flow heat exchanger with area $${A_c}.$$ In bo...
GATE ME 2016 Set 2
A balanced counter-flow heat exchanger has a surface area of $$20\,\,{m^2}$$ and overall heat transfer coefficient of $$...
GATE ME 2015 Set 2
A double-pipe counter-flow heat exchanger transfers heat between two water streams. Tube side water at $$19$$ liter/s is...
GATE ME 2014 Set 3
In a concentric counter flow heat exchanger, water flows through the inner tube at $${25^ \circ }C$$ and leaves at $${4...
GATE ME 2014 Set 2
Water (specific heat, $${c_p} = 4.18\,\,kJ/kgK$$ ) enters a pipe at a rate of $$0.01$$ $$kg/s$$ and temperature of $${20...
GATE ME 2013
Water (specific heat, $${c_p} = 4.18\,\,kJ/kgK$$ ) enters a pipe at a rate of $$0.01$$ $$kg/s$$ and temperature of $${20...
GATE ME 2013
Water $$\left( {{C_p} = 4.18\,kJ/kg.K} \right)$$ at $${80^ \circ }C$$ enters a counter flow heat exchanger with a mass ...
GATE ME 2012
In a parallel flow heat exchanger operating under steady state, the heat capacity rates (product of specific heat at con...
GATE ME 2009
The $$LMTD$$ of a counter flow heat exchanger is $${20^ \circ }C$$. The cold fluid enters at $${20^ \circ }C$$ and the h...
GATE ME 2008
In a counter flow heat exchanger, hot fluid enters at $${65^ \circ }C$$ and cold fluid leaves at $${30^ \circ }C.$$ mass...
GATE ME 2007
Hot oil is cooled from $${80^ \circ }C$$ to $${50^ \circ }C$$ in an oil cooler which uses air as the coolant. The air te...
GATE ME 2005
In a condenser, water enters at $${30^ \circ }C$$ and flows at the rate $$1500$$ $$Kg/hr.$$ The condensing steam is at a...
GATE ME 2004
In a counter flow heat exchanger, for the hot fluid the heat capacity $$= 2kJ/kg$$ $$K,$$ mass flow rate $$= 5 kg/s,$$ i...
GATE ME 2003
Air enters a counter-flow heat exchanger at $${7^ \circ }C$$ and leaves at $${40^ \circ }C$$. Water enters at $${30^ \ci...
GATE ME 2000
In certain $$HE,$$ both the fluids have identical mass flow rate-specific heat product. The hot fluid enters at $${76^ \...
GATE ME 1997

Marks 5

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Two fluids, $$A$$ and $$B$$ exchange heat in a counter-current heat exchanger. Fluid $$A$$ enters at $${420^ \circ }C$$ ...
GATE ME 1999
A hot fluid at $${200^ \circ }C$$ enters a heat exchanger at a mass flow rate of $${10^4}\,\,kg/hr.$$ Its specific heat ...
GATE ME 1998
Hot water flows with a velocity of $$0.1$$ $$m/s$$ in a $$100mm$$ long, $$0.1m$$ diameter pipe. Heat lost from the pipe ...
GATE ME 1998
In a certain double pipe heat exchanger hot water flows at a rate of $$50,000$$ $$kg/h$$ and gets cooled from $${95^ \ci...
GATE ME 1997
A counter flow heat exchanger is to heat air entering at $${400^ \circ }C$$ with a flow rate of $$6$$ $$kg/s$$ by the ex...
GATE ME 1995
Two streams of fluid of unit constant specific heats and unit mass flow rate exchange thermal energy in an adiabatic hea...
GATE ME 1994
A one shell pass, one tube-pass heat exchanger, has counter flow configuration between the shell side and tube side flui...
GATE ME 1991
A double pipe counter flow heat exchanger is to be designed to cool $$12000$$ $$kg/hr$$ of an oil of specific heat $$1.9...
GATE ME 1990
A shell and tube heat exchanger is to be designed for heating pressurized water by means of hot gasses which get cooled ...
GATE ME 1988

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