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With an increase in the initial volume, how does it affect the efficiency of the riser?

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in Casting-Forming-Welding I by (687k points)
With an increase in the initial volume, how does it affect the efficiency of the riser?

(a) Increases

(b) Decreases

(c) Will not change

(d) No relation

This question was addressed to me in examination.

My doubt stems from Types of Risers in section Pattern and Mould, Principles of Gating & Risering of Casting-Forming-Welding I

1 Answer

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by (828k points)
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Best answer
Correct choice is (b) Decreases

Easy explanation: The initial volume of the metal inside the riser and the efficiency of the riser are inversely linked with each other, that is, with an increase in the initial volume, there will be a decrease in the efficiency of the riser.

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