CCE Selection & Application of Materials & Equipment for Ceramics 3

Question 1

Which ceramic colorant produces a reliable blue color in both oxidation and reduction firing atmospheres?

Accepted Answer

Cobalt oxide

Answer

Copper oxide

Answer

Iron oxide

Answer

Manganese dioxide

Question 2

What is the primary function of a pug mill in a ceramics studio?

Accepted Answer

Reclaim, deair, and homogenize clay

Answer

Bisque fire small pieces quickly

Answer

Screen raw glaze materials

Answer

Test clay body shrinkage

Question 3

When applying glaze by spraying, which factor most directly controls the thickness of the glaze application?

Accepted Answer

The specific gravity of the glaze and number of spray passes

Answer

The firing temperature

Answer

The type of colorant in the glaze

Answer

The bisque porosity alone

Question 4

Which material is commonly added to a clay body to open the texture and improve resistance to thermal shock in raku ware?

Accepted Answer

Grog

Answer

Feldspar

Answer

Whiting

Answer

Zinc oxide

Question 5

A glaze recipe calls for a high amount of calcium carbonate (whiting). What role does calcium serve in the glaze melt?

Accepted Answer

High-temperature flux and stabilizer

Answer

Primary glass former

Answer

Opacifier

Answer

Refractory filler

Question 6

Which type of pyrometer is best suited for continuous, real-time monitoring of kiln temperature throughout a firing?

Accepted Answer

Thermocouple pyrometer

Answer

Optical pyrometer

Answer

Radiation pyrometer

Answer

Seger cone pyrometer

Question 7

When wedging clay, what is the primary goal of the spiral (rams head) wedging technique?

Accepted Answer

Align clay particles and remove air pockets without trapping air

Answer

Increase moisture content evenly

Answer

Compress clay into a brick shape

Answer

Mix two different clay bodies together quickly