# Heat Exchangers · Heat Transfer · GATE ME

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## Marks 1

GATE ME 2023
Consider a counter-flow heat exchanger with the inlet temperatures of two fluids (1 and 2) being T1, in = 300 K and T2, in = 350 K. The heat capacity ...
GATE ME 2017 Set 1
Saturated steam at $${100^ \circ }C$$ condenses on the outside of a tube. Cold fluid enters the tube at $${20^ \circ }C$$ and exits at $${50^ \circ }C... GATE ME 2016 Set 3 For a heat exchanger,$$\Delta {T_{\max }}$$is the maximum temperature difference and$$\Delta {T_{\min }}$$is the minimum temperature difference be... GATE ME 2015 Set 3 Saturated vapor is condensed to saturated liquid in a condenser. The heat capacity ratio is$${c_r} = {{{c_{\min }}} \over {{c_{\max }}}}.$$The effec... GATE ME 2014 Set 2 In a heat exchanger, it is observed that$$\Delta {T_1} = \Delta {T_2},$$where$$\Delta {T_1}$$is the temperature difference between the two single ... GATE ME 2011 In a condenser of a power plant, the steam condenses at a temperature of$${60^ \circ }C.$$The cooling water enters at$${30^ \circ }C$$and leaves a... GATE ME 2002 For the same inlet and outlet temperatures of hot and cold fluids, the Log mean temperature Difference$$(LMTD)$$is GATE ME 1994 The practice to use steam on the shell side and cooling water on the tube side in condensers of steam power plant is because GATE ME 1991 In shell and tube heat exchanger, baffles are mainly used to ## Marks 2 GATE ME 2024 A condenser is used as a heat exchanger in a large steam power plant in which steam is condensed to liquid water. The condenser is a shell and tube he... GATE ME 2017 Set 2 In a counter-flow heat exchanger, water is heated at the rate of$$1.5kg/s$$from$$\,40{}^ \circ C\,$$to$$\,80{}^ \circ C\,$$by an oil entering at... GATE ME 2016 Set 2 Consider a parallel-flow heat exchanger with area$${A_p}$$and a counter-flow heat exchanger with area$${A_c}.$$In both the heat exchangers, the h... GATE ME 2015 Set 2 A balanced counter-flow heat exchanger has a surface area of$$20\,\,{m^2}$$and overall heat transfer coefficient of$$20W/{m^2}$$-$$K$$. Air ... GATE ME 2014 Set 2 In a concentric counter flow heat exchanger, water flows through the inner tube at$${25^ \circ }C$$and leaves at$${42^ \circ }C$$. The engine oil ... GATE ME 2014 Set 3 A double-pipe counter-flow heat exchanger transfers heat between two water streams. Tube side water at$$19$$liter/s is heated from$${10^ \circ }C$$... GATE ME 2013 Water (specific heat,$${c_p} = 4.18\,\,kJ/kgK$$) enters a pipe at a rate of$$0.01kg/s$$and temperature of$${20^ \circ }C.$$The pipe, of di... GATE ME 2013 Water (specific heat,$${c_p} = 4.18\,\,kJ/kgK$$) enters a pipe at a rate of$$0.01kg/s$$and temperature of$${20^ \circ }C.$$The pipe, of di... GATE ME 2012 Water$$\left( {{C_p} = 4.18\,kJ/kg.K} \right)$$at$${80^ \circ }C$$enters a counter flow heat exchanger with a mass flow rate of$$0.5kg/s.$$Air ... GATE ME 2009 In a parallel flow heat exchanger operating under steady state, the heat capacity rates (product of specific heat at constant pressure and mass flow r... GATE ME 2008 The$$LMTD$$of a counter flow heat exchanger is$${20^ \circ }C$$. The cold fluid enters at$${20^ \circ }C$$and the hot fluid enters at$${100^ \ci...
GATE ME 2007
In a counter flow heat exchanger, hot fluid enters at $${65^ \circ }C$$ and cold fluid leaves at $${30^ \circ }C.$$ mass flow rate of the hot fluid is...
GATE ME 2005
Hot oil is cooled from $${80^ \circ }C$$ to $${50^ \circ }C$$ in an oil cooler which uses air as the coolant. The air temperature rises from $${30^ \c... GATE ME 2004 In a condenser, water enters at$${30^ \circ }C$$and flows at the rate$$1500Kg/hr.$$The condensing steam is at a temperature of$${120^ \circ ...
GATE ME 2003
In a counter flow heat exchanger, for the hot fluid the heat capacity $$= 2kJ/kg$$ $$K,$$ mass flow rate $$= 5 kg/s,$$ inlet temperature $$= {150^ \c... GATE ME 2000 Air enters a counter-flow heat exchanger at$${7^ \circ }C$$and leaves at$${40^ \circ }C$$. Water enters at$${30^ \circ }C$$and leaves at$${50^ \...
GATE ME 1997
In certain $$HE,$$ both the fluids have identical mass flow rate-specific heat product. The hot fluid enters at $${76^ \circ }C$$ and leaves at $${47^... ## Marks 5 GATE ME 1999 Two fluids,$$A$$and$$B$$exchange heat in a counter-current heat exchanger. Fluid$$A$$enters at$${420^ \circ }C$$and has a mass flow rate of$$...
GATE ME 1998
A hot fluid at $${200^ \circ }C$$ enters a heat exchanger at a mass flow rate of $${10^4}\,\,kg/hr.$$ Its specific heat is $$2000$$ $$J/kg$$-$$K.$$ It...
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 outer wall is uniform and equa...
GATE ME 1997
In a certain double pipe heat exchanger hot water flows at a rate of $$50,000$$ $$kg/h$$ and gets cooled from $${95^ \circ }C$$ to $${65^ \circ }C$$. ...
GATE ME 1995
A counter flow heat exchanger is to heat air entering at $${400^ \circ }C$$ with a flow rate of $$6$$ $$kg/s$$ by the exhaust gas entering at $${800^ ... GATE ME 1994 Two streams of fluid of unit constant specific heats and unit mass flow rate exchange thermal energy in an adiabatic heat exchanger. The inlet temps o... GATE ME 1991 A one shell pass, one tube-pass heat exchanger, has counter flow configuration between the shell side and tube side fluids. The total number of tubes ... GATE ME 1990 A double pipe counter flow heat exchanger is to be designed to cool$$12000kg/hr$$of an oil of specific heat$$1.95kJ/kgK$$from$$\,85{}^ ...
GATE ME 1988
A shell and tube heat exchanger is to be designed for heating pressurized water by means of hot gasses which get cooled the data are as follows Temp ...
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