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Gated pattern is used to produce good casting. It is essential to make sure that full supply of molten metal flow into every part of the mould. Provision for easy passage of the following molten metal into the mould is called "gatting". For improving the productivity of a moulder, the hand cutting of the gates must be eliminated.
In mass production a number of castings are produced in a single mould having multi cavity, by joining a group of patterns. For this purpose the gate or runners, for the flowing of the molten meta, are formed between the individual patterns. The time spent by the moulder in cutting gates, runners and withdrawal of individual patterns is eliminated by this arrangement. Such groups of patterns with gatting system are called "Gated Patterns".
Q. Explain various stages of creep? Ans. CREEP: Creep can be defined as the process by which plastic flow occurs when a constant stress or load is applied to a material for a
OUTPUT CHARACTERISTICS: Figure shows a "Common Emitter" amplifier stage. Common Emitter Amplifier Stage With no base/emitter bias applied, there will be no collector
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