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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 is the use of crankshaft?
Q. Show the Coating Application? Immediately following surface preparation, the cleaned pipe shall be uniformly preheated by a non-contaminating method to the application tempe
A chemical works produces an aqueous effluent at above ambient temperature. The Environmental Agency insists that before the effluent is discharged to the river, it must be cooled.
Q. Carbon and Low Alloy Steels for Welding? All welding of pressure retaining equipment must be completed as per the respective code, typically ANSI/ASME B31.1 or Section VIII
Upset butt welding machines These are usually small capacity horizontal type machines. The power source required for these is a step down transformer as in the case of spot, se
Explain the Side Relief Angle It is angle made by flank of a tool and plane perpendicular to base just under the side cutting edge. if the side relief angle is very large the c
Type of strain: There are basically four type of strain 1. Tensile strain 2. Compressive strain 3. Volumetric strain 4. Shear strain
cases of equilibrium with explaination
A pump station has been designed to lift water out of a 6 metre deep pit (vented to atmosphere) via a centrifugal pump mounted at ground level. Liquid conditions
Q Describe about Push-pull welds? - A push-pull system employs transformers with an electrically reversed polarity arrangement wherein two transformers complement each o
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