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51.

Which of the following is not a power operated molding machine?(a) Squeeze machine(b) Sand slinger(c) Jolt-squeeze machine(d) Jot-sand machineI had been asked this question by my school principal while I was bunking the class.I want to ask this question from Molding Machines in section Foundry Mechanizations of Casting-Forming-Welding I

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52.

Which of the following parts is used for cleaning the castings in a mechanized foundry?(a) Magnetic roller(b) Spherical roller(c) Scrubbing cylinder(d) Steel ballsThe question was asked in quiz.My doubt is from Processing Steps in Mechanized Foundry in division Foundry Mechanizations of Casting-Forming-Welding I

Answer» CORRECT answer is (c) Scrubbing cylinder

For explanation I would say: When casting passes over a vibrating screen are generally CONVEYED to a self clearing scrubbing cylinder. In this rotating cylinder, CASTINGS are tumbled and sprayed with water so that they emerge from the PROCESS cool enough for the certain inspection and transportation on a RUBBER belt.
Discussion
53.

Mechanization also standardizes the working and equipment used in the production of castings.(a) True(b) FalseThe question was posed to me in my homework.I'd like to ask this question from Mechanized Foundry in portion Foundry Mechanizations of Casting-Forming-Welding I

Answer» CORRECT answer is (a) True

For explanation I would say: Mechanization standardizes ALMOST all the processes and equipment involved in the production of castings. For example, use of standard sized flasks has the CAPABILITY of storing a wide variety of flasks. This makes less variety in the production process and also makes easier for WORKERS to understand the WORK.
Discussion
54.

In the mechanized foundry, rubber coated chills are used for supporting the cores in the mould system.(a) True(b) FalseThe question was asked in semester exam.This intriguing question originated from Mechanized Foundry in section Foundry Mechanizations of Casting-Forming-Welding I

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Correct answer is (b) False

The best I can explain: The chills are coated with a rubber compound and in some special cases are SPRAYED with fine silica SAND. These chills are basically used to promote solidification in a particular PORTION of the casting system, while for supporting the cores, the chaplets are used which placed in the mould SPACE.
Discussion
55.

In the mechanized foundry, the breakdown of one part of a producing unit may affect the entire production.(a) True(b) FalseI got this question in an online interview.My query is from Mechanization topic in chapter Foundry Mechanizations of Casting-Forming-Welding I

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The correct choice is (a) True

For explanation I would say: In the mechanized FOUNDRY, when a part or component of machine fails or COLLAPSES, the entire PRODUCTION of castings can be DISTURBED. This is the only main drawback of mechanization in comparing with manual working for production. To avoid this drawback, all machine PARTS should have proper maintenance.
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