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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?
what are the advanteges of the working ?
necessity of lubrication
Q. Design pressure of Vessels? The design pressure shall be as specified on the Vessel Data Sheet. The design pressure for a vessel in vacuum service shall be full vacuum (1
Q. What is Warm extrusion? • Warm extrusion is done above room temperature, but below the recrystallization temperature of the material the temperatures ranges from 424 to 975
Discuss any three of the following:- (i) Electron Beam Welding (ii) Friction Welding (iii) Thermit Welding (iv) Gas Welding Give their advantages, Limitations, and a
The grouping of the words turbine and propeller in techno jargon will give you the word "turboprop". A turboprop engine is a turbojet (gas turbine) engine, which powers the propell
CAPP for Casting and Welding In this , we have studied the CAPP systems for Casting and Welding processes. Compared to the traditional (manual) process planning methods, CAPP
Which mechanism more efficiency? What is the reason ?
microscopic and macroscopic view points
Advantages of Laser Welding Process 1) Narrow deep penetration welds capable of being produced in atmosphere. 2) Low thermal distortion - due to less heat input and paral
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