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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?
Transformer Type Power Sources These are the simplest and cheapest type available for arc welding. These are the mainly used for SMAW, AC SAW and gouging applications. These are
Obtain the equations of the elastic curve and use them to determine the deflection and rotation at point B in terms of E, I, F and L. Determine the maximum bending stress in the
Dead Centre The position of the working piston and the moving parts which are mechanically connected to it, at the moment when the direction of the piston motion is reserved
(a) What is the importance of safety at workshop? (b) What problems may arise, if we do not take safety precautions in the workshop?
EQUIPMENT FOR RESISTANCE WELDING-Measurements Measurement of the parameters are important while fixing the parameters or testing a machine. Resistance welding instrumentation s
Evaluate the resultant both in magnitude and direction of the four force acting on the body as shown in figure given below :
EXPLOSIVE WELDING I CLADDING In this process, two pieces of metal are impacted together at an extremely high velocity of impact achieved by the detonation of an explosive cha
The resultant moment M acts through the centroid of the aluminum strut, inclined as shown. (a) Determine the orientation of the neutral axis and show the neutral axis on a sket
Given: A brittle material has an ultimate tensile strength of 300 MPa and an ultimate compressive strength of -1000MPa. Assume that failure can be represented by the Modified
Q. Explain the use of bare electrode? This type of electrode is also known as plain electrode. No flux covers on this electrode. These types of electrodes are used for D.C. sup
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