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Q. What is thermoplastic plastics?
These plastic soften under heat, harden on cooling, and can be resoften under heat. Thus, they retain their fusibility, solubility, and capability of being repeatedly shape. The mechanical properties of these plastics are rather sensitive to temperature and to sunlight and exposure to temperature may cause thermal degradation. Common thermoplastic plastics are: acrylics, poly tetra fluoro ethylene (PTFE), polyvinyl chlorides (PVC), nylons, polyethylene, polypropylene, polystyrene etc,
Argon - Hydrogen Mixtures Argon - hydrogen mixtures are employed in special cases, such as mechanised welding of light gauge stainless steel tubing, in which the hydrogen do
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In general safety and service tips, you learnt about general service and safety tips those must be followed while working in workshop. It gives the competency statements useful for
Classification of system of forces
(a) Calculate the natural frequency of mass m = 1 Kg placed at one end of a cantilever beam of negligible mass. Length of cantilever = 500 mm, d = 30 mm, b = 20 mm, E = 210x10 9 N
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steam coming out of the whistle of a pressure cooker is ?
In an orthogonal cutting test with a tool of rake angle 10 degree , the following observations were made. 20 Chip thickness ratio = 0.3 Width of cut = 6mm Uncut chip thicknes
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what are the necessity of lubrication ?
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