Question

The liquid metal that runs through the channels without friction in the mould obeys which of the following theorem?

(a) Bernoulli’s theorem

(b) Clausius theorem

(c) Helmholtz’s theorem

(d) Carnot’s theorem

I have been asked this question by my school principal while I was bunking the class.

Enquiry is from Gating Design topic in section Pattern and Mould, Principles of Gating & Risering of Casting-Forming-Welding I

Answer 1

Right answer is (a) Bernoulli’s theorem

To explain: As the metal enters the pouring basin, it has the highest potential energy with no kinetic or pressure energies. But as the metal moves through the gating system, potential energy converts into kinetic energy. Thus it obeys the Bernoulli’s theorem.