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=
-
a
Q.122. Water enters a thin walled tube (L = 1 m, D= 3 mm) at an inlet temperature of 97
°C and mass flow rate 0.015 kg/s. The tube wall is maintained at a constant temperature
of 27 °C. Given the following data for water.
=
=
u
Density, ?
1000 kg/m3
Viscosity,
489 10-6 Ns/m2
Specific heat Cp
4184 J/kg/k
Inside heat transfer coefficient h = 12978 W/(m2K),
=
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The outlet temperature of water in °C is,
(A) 28
(B) 37
(C) 62
(D) 96
GATE - 2007


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