MRW
002 Solved Assignment 2022-23
HEAT
TRANSFER
MRW 002 Solved Assignment 2021-22 : All assignments are in PDF format which would be send on email/WhatsApp (9958676204) just after payment.
Course
Code : MRW 002
Last
Date of Submission :May 15, 2022
Weightage
: 30%
Maximum
Marks : 100
Note : All questions are compulsory and carry equal
marks. This assignment is based on all Blocks of Computer Aided Process
Planning.
Q.1 Describe the mechanism of heat transfer through
conduction. Also discuss the Fourier’s law of heat conduction.
Q.2 (a) The heat flow rate through a wood board with a
5cm thickness is 500 W/m2 . Temperature difference along the direction of flow
of heat between the faces of the wood board is 55 0 C. Calculate the thermal
conductivity of wood.
(b) Air at 30 0 C flows over a hot plate (50 c x 75 cm)
maintained at 200 0 C with the help of an electric heater. The convection
co-efficient is 20 W/m2 . Calculate the heat transfer.
5 + 5 =
10
Q.3 Derive the expressions for i) rate of heat transfer
through a thin cylinder ii) temperature distribution along the radial direction
of cylinder.
Q.4 Discuss, in detail flow over a flat plate.
Q.5 Explain in detail the properties of absorptivity, reflectivity
and transmissivity
Q.6 State and derive the expression for kirchoff’s law.
Q.7 Derive the general expression for view factor.
Q.8 12 (twelve) number of fins each having thermal
conductivity k=75 W/mK and 0.75 mm thickness protrude 25 mm from a cylindrical
surface of 50 mm diameter and 1 m length placed in an atmosphere of 40 0C. If
the cylindrical surface is maintained at 150 0 C and the heat transfer
coefficient is h=23 W/m2 . K, calculate a) rate of heat transfer b) percentage
increase in heat transfer due to fins
Q.9 Define Reynolds number and give the difference
between free and forced convection. Also explain viscosity and its unit in SI
system.
Q.10 Derive the expression for critical thickness of
insulation for a cylinder or a tube.
MRW 002
Solved Assignment 2021-22 : All assignments are in PDF format which would be
send on email/WhatsApp (9958676204) just after payment.
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