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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.
Scope of strength of materials: What is the scope of strength of materials? Sol.: Strength of materials is science that deals with the relations between externally appl
To design a cantilevered truss to support the loads shown in the figures, two layouts are proposed as shown in Figs. A and B. All truss members are steel with allowable stress of 2
A loaded structural component, shown in Fig Q7, is manufactured from sheet steel having a Young's modulus, E = 208000 MPa and a Poisson's ratio, n = 0.3. The sheet steel is 2 mm th
1. Determine young''s modulus using first 20 data points 2. Determine yield strain and yield stress based on -0.1 offset 3. Determine max(or min) stress. 4. Determine toughness
optmization
Tank Drainage A large open vertical tank has three small, smooth, well-rounded orifices spaced equidistantly at ¼ h , ½ h , ¾ h up from the bottom of the tank (Fig. Q1). Water
how can we produce electricity from sound energy
Estimate the Weight of the Casting A Yoke casting shown in Figure is to be produced by sand casting process. Estimate the weight of the casting if the density of the material
How we could build the working model of hartnell governor?
Theore m of perpendicular axis It states that if I X X and I Y Y be the M.I. of plane section about the two mutually perpendicular axes meeting at a point. Th
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