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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.
What is the Drilling operation Drilling operation can only performed in vertical direction. Hence drilling hole at angle is not performed by drilling machine. It is a big drawb
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You are required, as part of a small team, to design a remote controlled buggy that can be made to move forwards, backwards and from side to side. The basic buggy and motors are pr
Q. Sustained Bending Moment? When sustained bending moments or axial thrust loadings are applied to the flanged joint during operation in sufficient magnitude to warrant consid
Concept of Radial Drilling machine Radial Drilling machine is a large gear headed drill press in which the head moves along the arm that radiates from the column of the machine
Calculate mean effective pressure of engine: A 4 stroke diesel engine is having length of 20 cm and diameter of 16 cm. The engine is generating indicated power of 25 KW when
A simple band brake performs on a drum of 600mm in diameter that is running at 200 r.p.m. The coefficient of friction is 0.25. The brake band has a contact at 270 o one end is fas
Q. Calculate flange stresses? Step 1: Calculate flange stresses for system design conditions using existing gasket dimensions. The minimum width of the gasket should equal or
Q. Shipping of steel pipes? Pipe will be transported from the coating yard to the job site as specified in the Purchaser Order. The Applicator will ensure that the pipe has suf
Objectives After studying this section, you should be capable to: define basic nature of plastics, differentiate between various types of plastics, define polym
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