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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.
Determine elongation of bar: A conical bar tapers uniformly from diameter of 4 cm to 1.5 cm in length of 40 cm. If axial force of 80 kN is applied at each end, determine elon
EXPLAIN THE COMPOUND BELT DRIVES
Is bleed necessary in condensing and back pressure both the turbine? What is the use of bleed in steam turbine? What is the basic difference in condensing and backpressure turb
Battery: Battery is a device that produces direct current (DC). The chemical energy of battery ingredients converts into electrical energy in the form of direct current. This is a
The square cross sections A and B are shown in Fig Q1, the dimensions b = 80 mm, thickness t = 10 mm. A shear force V is applied at the cross section, calculate the maximum she
Q. What is Carbon steel? Carbon steel has long been used for handling concentrated sulphuric acid under ambient temperature and low velocity conditions. In service, a soft sul
Hydraulic calculations are carried out by both Process and Mechanical Engineering. Generally speaking, Process Engineering will initiate many hydraulic calculations for piping sys
Tunnels: Tunnels become unavoidable for negotiating hills, where detours are costly. The tunnels in rock are not lined, but those in loose strata require a lining of cement c
Consider a particle and its path of travel.The position of a particle P at any time t can be described by specifying its: (a)Rectangular coordinates; X,Y,Z (b)Cylindrical coordinat
Bearing Materials Generally it can be said as a good bearing material must posse following characteristics as: It must be strong enough to sustain bearing load. It
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