In a rotary milking parlor, which statement is true?

• A. Cows ride 'merry-go-round' on a rotating platform.
• B. Milker stays in one place and cows come to them.
• C. Cows stand nose-to-tail in stalls.
• D. Cows enter and leave in groups.

Answer: (D)

Rotary milking parlor uses a circular platform that slowly rotates, carrying cows through milking stalls around the edge. Cows are loaded onto the platform in groups at the entry, and as the platform turns, each cow reaches a milking unit and is milked. When milking is finished, they move off the platform in groups at the exit. This continuous flow in groups is how the system keeps moving efficiently. The milker operates from fixed positions around the ring and the cows progress to the milking units rather than a single milker moving with them. Cows aren’t lined nose-to-tail in a single row inside stalls; they sit in individual stalls around the circle. So the way cows enter and leave in groups reflects the true operation of a rotary parlor.