MTT 4303 - Discussion

What is the primary purpose of aging raw materials like clay before processing?

• • a) To increase moisture content

• • b) To improve plasticity and workability

• • c) To reduce particle size

• • d) To enhance color intensity

Feldspar is used in ceramics primarily as a:

• • a) Coloring agent

• • b) Binder

• c) Fluxing agent

• d) Drying agent

What role does feldspar play in the ceramic body?

• • a) Acts as a plasticizer

• • b) Provides color

• • c) Lowers the melting temperature

• • d) Acts as a binder

Which crusher is most suitable for large hard materials?

• • a) Jaw crusher

• • b) Ball mill

• • c) Edge-runner

• • d) Impact hammer

What is the primary function of a ball mill in ceramic processing?

• • a) Size reduction of large particles

• • b) Mixing of raw materials

• • c) Drying of materials

• • d) Separation of materials

11. Why is an accurate weighing of raw materials critical in ceramic production?

• • a) To save costs

• • b) To ensure consistency in the product

• • c) To reduce production time

• • d) To enhance color uniformity

Answer explanation

Weighing is the precise measurement of the raw materials used in ceramic production.

In Ceramic Industry, batch formulation refers to the process of preparing a specific composition of raw materials or "batch" to create ceramic products.

16. The traditional tool used for shaping pottery on a rotating platform is called a:

• • a) Jigger

• • b) Jolley

• • c) Potter’s wheel

• • d) Stamping press

Answer explanation

a) Jigger: A jigger is a tool used in pottery to shape and form clay. It spins the clay while a mold or template shapes it into a specific design.

b) Jolley: A jolley is similar to a jigger but used for creating consistent shapes, like bowls or plates, in pottery. It uses a rotating wheel and a template to ensure each piece is uniform.

c) Potter’s wheel: A potter’s wheel is a rotating platform used by potters to shape and mold clay. As the wheel spins, the potter uses their hands to shape the clay into different forms, like bowls or vases.

d) Stamping press: A stamping press is a machine used to imprint or cut shapes into materials like metal or paper. It applies pressure to a die or mold to create specific patterns or designs.

18. Which plastic forming method involves pressing a rotating mold into a sheet of clay?

• • a) Jolleying

• • b) Jiggering

• • c) Stamping

• • d) Throwing

Answer explanation

Creation of the ceramic product by manipulating the mass of plastic clay into the desired geometry.

Hand molding- A mold or form is used to define portions of the part geometry.

Hand throwing– On a potter’s wheel

19. What is the main difference between jiggering and jolleying?

• • a) Jiggering uses a fixed mold, jolleying uses a rotating mold

• • b) Jiggering applies pressure from the outside, jollying applies pressure from the inside

• • c) Jiggering applies pressure from the inside, jollying applies pressure from the outside

• • d) Jiggering is manual, jolleying is automatic

What is Drain Casting?

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Answer explanation

Drain Casting: The mold is inverted to drain excess slip after a semi– solid layer has been formed, thus producing a hollow product.