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Transformation Hardening
The main features of the laser as a heat source for transformation hardening are:(A) Clean energy source.(B) Energy is localised: no heat spillage.(C) Only surface layer heated: core properties are unaltered.(D) Low heat input: therefore low thermal distortion.(E) Fast process: therefore no oxidation. The process can be a final operation.(F) Self quenching: no water or oil sprays.(G) Easily automated: the laser fits naturally into a numerically controlled system with time sharing between work stations.
A space craft ‘A' has velocity 0.9 c relative to the earth. Another spacecraft ‘B' overtakes A with relative velocity 0.5 c. Find the velocity of spacecraft B relative to the groun
A fictious force or pseudo force is an imaginary force that acts on a body in non inertial frame. it is opposite in direction of accelaration of non inertial frame.
Windsocks shall be installed at plant facilities handling flammable gases, volatile liquids or toxic materials and also at helipads (may require lighting if night flights are inten
Describe the test specimens that were used in the testing program, and what one hopes to learn by testing them. Show the "test matrix" (i.e. a listing of what specimens made of wh
Classificatio n of I.C. Engines: IC engines are classified as follows: 1 . Nature of thermodynamic cycles as: Otto cycle engine, Diesel cycle engine and Dual combus
Illustrate how the Rankine cycle efficiency is improved by the following : a. Lowering the condenser pressure. b. Increasing the pressure of steam. c. Superheating the ste
Plate : These are also known as electrodes. There are two types of group of plates - Positive and Negative. Each group contains more than one plate. A group of positive plates is
A cast iron hollow column, having 100mm external diameter and 80mm internal diameter is used as a column of 2.4 m length. Using Rankine formula, calculate the crippling load, when
Determine the centroid of the area: Determine the centroid of the area OBDC Solution The trapezium area is divided in two simple areas, (i) A 1 = Rectangle
Mash stitch welding An overlap of about 1.15 mm is kept and then the plates are squeezed flash by application of pressure at hot condition. Mash stitch welding is used in the
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