Step 1: Understanding the Question:
The question asks to identify which of the listed kilns operates in a batch or periodic manner, as opposed to a continuous manner.
Step 2: Detailed Explanation:
Periodic Kilns: In these kilns, the firing process is a cycle: the kiln is loaded, heated up to a certain temperature, held for a duration, cooled down, and then unloaded. The entire kiln changes temperature.
Scove Kiln: This is a primitive, temporary periodic kiln used for firing bricks. Bricks themselves form the structure of the kiln, and the fire is lit in arches at the bottom. It is a batch process.
Continuous Kilns: In these kilns, different zones maintain constant temperatures. The ware (product) moves through these zones.
Tunnel Kiln: A long structure where cars carrying products move through stationary heating zones. It is a classic continuous kiln.
Rotary Kiln: A rotating cylindrical vessel used for continuous processing, commonly in cement and lime manufacturing.
Roller Hearth Kiln: Products move on rollers through a continuous furnace, often used for ceramic tiles.
Step 3: Final Answer:
The Scove kiln is a periodic (batch) kiln.