Question:

In \(\ldots\ldots\ldots\ldots\ldots\) process a stiffer plastic mass is forced through a nozzle ending in a die to produce a column of uniform cross section.

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Extrusion produces long ceramic shapes of uniform cross section by forcing plastic clay through a die.
  • Throwing
  • Jiggering
  • Slip casting
  • Extrusion
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The Correct Option is D

Solution and Explanation

Extrusion is a forming process used in ceramic manufacturing. In this process, a stiff plastic ceramic mass is forced through a die. The die has a fixed opening shape. When the ceramic mass passes through the die, it comes out as a continuous column having uniform cross section. This method is useful for making products such as pipes, tubes, rods, bricks, and tiles. Throwing is done on a potter's wheel. Jiggering is used for shaping ware on rotating moulds. Slip casting uses liquid slip poured into plaster moulds. Since the question says that a stiff plastic mass is forced through a nozzle and die, the process is: \[ \text{Extrusion}. \]
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