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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.
Q. What do you understand by Binders? Binders used in a foundry are : Inorganic and organic binders. Organic binders used for core making and will be discussed later. Clay b
Classification of force: Single force is of two types that is, Tensile and compressive. Generally in a body several forces are acting. When a number of forces of different mag
After trial if oil seal found still leaking: Dismantle engine and check crank shaft for run out which should not be more than 0.10 mm.
what do you understand by dynamically equivalent mass system
Q. What are Preheat and interpass temperature? Preheat and interpass temperatures shall be in accordance with the applicable codes. Materials that require preheat for welding
Define Rack Cutter Generating Process? The rack cutter generating process is also called shaping process. In this method, the generating cutter has the foam of basic rack for t
A rotor has the given properties : If the shaft is balanced by two counter masses located at 100 mm radii and revolving in planes midway of plan 1 and 2 and midway of 3 and
Can you give me the Prove of the bending Equation M/I=E/R=σ/Y
Plastic material and rigid plastic material: For the plastic material, there is stress at which plastic deformation begins. A rigid plastic material is one in which the ela
Basic Troubleshooting of Motorcycle we have studied about the basic troubles in motorcycle operation and their solutions. It will help you in finding out the problem with the vehic
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