Which statement about kilns is true?

• A. Kilns Can Be Powered By Gas, Oil, Or Electric
• B. Kilns Are Only Electric
• C. Kilns Are Used to Dry Clay
• D. Kilns Cannot Be Lined With Brick

Answer: (A)

Kilns are high-temperature ovens used to fire ceramic work, changing the mineral structure of clay and setting glazes. They can be powered by different fuels, including gas, oil, or electricity, depending on the design and purpose of the kiln. This variety makes the statement true because it captures the common ways kilns are powered in studios and kilns found in ceramics classrooms and workshops.

Kilns aren’t limited to electric power, so saying they are only electric isn’t accurate. They aren’t primarily for drying clay; drying happens beforehand, through air drying or controlled drying, while the kiln’s job is to heat to firing temperatures to harden the piece and fuse glazes.

Kilns are typically lined with refractory brick or other heat-insulating materials to protect the structure and keep heat inside; saying they cannot be lined with brick contradicts how kilns are actually built.