CCE Selection & Application of Materials & Equipment for Ceramics 2

Question 1

Which type of kiln atmosphere is essential when firing reduction glazes to achieve metallic luster effects?

Accepted Answer

Reduction atmosphere

Answer

Oxidation atmosphere

Answer

Neutral atmosphere

Answer

Inert atmosphere

Question 2

What is the primary purpose of adding silica (flint) to a clay body?

Accepted Answer

Control thermal expansion and add strength

Answer

Increase plasticity

Answer

Lower the firing temperature

Answer

Improve green strength

Question 3

A ceramist notices crazing in a glaze after cooling. What is the most likely cause?

Accepted Answer

Glaze thermal expansion is too high relative to the clay body

Answer

Glaze thermal expansion is too low relative to the clay body

Answer

Firing temperature was too low

Answer

Clay body was too porous

Question 4

Which equipment is used to measure the specific gravity of a glaze slop to ensure consistent application thickness?

Accepted Answer

Hydrometer

Answer

Pyrometer

Answer

Viscometer

Answer

Refractometer

Question 5

When selecting a kiln wash, which property is most critical to prevent glaze from bonding to kiln shelves?

Accepted Answer

Non-adhesive surface at high temperatures

Answer

High thermal conductivity

Answer

Low alumina content

Answer

High flux content

Question 6

What does LOI (Loss on Ignition) measure in ceramic raw materials?

Accepted Answer

Weight lost as gases and water during firing

Answer

The amount of free silica in the material

Answer

Thermal expansion of the material

Answer

The flux content of the material

Question 7

Which type of extruder die is best suited for producing hollow cylindrical ceramic forms?

Accepted Answer

Spider die

Answer

Flat die

Answer

Ribbon die

Answer

Screen die