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Derive 3-D non-steady state conduction equation in spherical co-ordinates. Explain the assumption involved.
The hot combustion gases of a furnance are divided from the ambient air and its surroundings, which are at 25 oC, by a brick wall 0.15m thick. The brick has a thermal conductivity of 1.2W/mk and a surface emissivity of 0.8 . Under steady state conditions an outer surface temperature of 100 oC is calculated. Free convention heat transfer to the air adjoining the surface is divided by a convection coefficient of 20W/m2k. what is the brick inner surface temperature?
Q. Derive the expression of torque developed in closely excited magnetic system. Clearly explain then assumption made. Sol. Double - Excited System A doubly - ex
Q. Scope of corrosion assessment design? The purpose of this guideline is to describe the common corrosion damaging modes and mitigation methods and provides recommended materi
Q. What is Injection moulding? An important industrial method of producing articles of thermoplastics is injection moulding. The moulding material is loaded into a hopper from
Write an essay on air, water and soil-based heat pumps. Discuss the advantages and the disadvantages of each system. For each system identify the conditions under which that system
An internal wheel B with 80 teeth is keyed to shaft F. A fixed internal wheel with 82 teeth is concentric with B. A compound wheel DE gear with two internal wheels, D has 28 teeth
Pola r Modulus(Z p ): It is the ratio of polar moment of the inertia to outer radius. Z p = J / R Polar Modulus of solid body ( Z p ) =[ ?/32. D 4 ]/ D
Q. Safety considerations in multi-unit plants? Segregation of process units within large or multi-unit plants is necessary in order to reduce the risk of a fire spreading. This
Explain the Automation in Machining? The word "automatic" is derived from Greek and it means "self-moving or "self thinking". The word "automation" has been used to refer to a
Supply Chain Management: In this unit, you have learned that the supply chain is the network of autonomous and semi-autonomous business entities, which are include through ups
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