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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 Describe about Push-pull welds? - A push-pull system employs transformers with an electrically reversed polarity arrangement wherein two transformers complement each o
Which conducts heat faster steel copper or brass? Ans) Copper conducts heat faster than steel or brass. Any material that is good for conducting heat is also good for electricit
Extension of auger in the main auger arrangement The original size of screw conveyer without auger extension is 2.5 m., which is same as size of chassis. Which to be attach wit
Explain the Bar and Rod Drawing - cold drawing processes In case of bar drawing, hot drawn bars are at first pickled, washed and coated to prevent oxidation. Once it's done
The function of the impellers is to: (i) reduce bubble size thereby increasing the surface area for oxygen transfer, and (ii) maintain a uniform environment, nutrient supply and he
Merchants force diagram. State the assumptions made in development of such diagram.
State the four classes of engineering materials 3 (b) Identify the class which each of the following materials belong to. Present your answer in table form Silicone, concrete, chro
IGES application protocol: In the year 1977, the three authors of The Initial Graphics Exchange Specification were identified collectively for their contributions to the growt
Illustrates the concept of bearing capacity of soil? The concept of bearing capacity of soil is the very essence of design and analysis of shallow foundations. In order to inve
CLASSIFIC A TION : The steam turbines can be classified as follows: 1 . In accordance to method of steam expansion: (a) Impulse (b) Reaction. 2 . In
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