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Q. What do you mean by Thermosetting plastics?
This plastic undergoes a number of chemical changes on heating and cure to infusible and practically insoluble articles. The chemical change is not reversible thermosetting plastics do not soften on reheating and can not be reworked. They rather become harder due to completion of any left-over polymerization reaction. Eventually, at high temperatures, the useful properties of the plastic get destroyed. This is called degradation. The commonest thermosetting plastics are: alkyds, epoxides, polyesters, phenolics and urea.
Fixed type In this set up, the welding head is kept fixed and the movement required during welding is provided through in the jobs to be welded. A typical application of this arr
Find out the centre of gravity of a right circular cone: Find out the centre of gravity of a right circular cone of height H & the base radius a. Solution Refer to Fig
Problem A cat walks along a uniform plank that is 5.00 m long and has a mass of 9.00 kg. The plank is supported by two sawhorses, one 0.500 m from the left end of the board a
Q. Minimal external force required to achieve alignment? Minimal external force shall be applied to achieve alignment. Flanged joints not conforming to the dimensional toleranc
Punches Figure: Punches A bar which carries a sharp point at one end and used to make a permanent mark on a part is called punch. The point is hard and tempered so tha
Cylinder - Part of combustion engine: Cylinder: It provides cylindrical closed space to allow movement of piston and to admit charge. It is made up of grey cast iron or i
Q. What do you understand by Carburization? Carburization is initiated by the adsorption of carbon in contact with the surface of the metal and may progress by diffusion along
Question: The block diagram of a dc servo motor feed drive is shown Obtain the closed loop transfer function relating the output to the disturbance T L while V
A square column 410 x 410 mm (along with 4 No. 16 mm bars) carries a dead load of 1020 kN and an imposed load of 410 kN. The foundation soil has a safe bearing capacity of 200 kPa.
Q. Show Seismic Loads For Ground Supported Equipment? V = C s W is the governing equation for horizontal seismic base shear of ground supported equipment. C s = 1.2A v S/(RT
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