Question

R-Pockets are present to separate desirable grain in -

• A. Disc separator
• B. Velvet roll separator
• C. Spiral separator
• D. Indented cylinder separator

Hint:

While both disc separators and indented cylinder separators separate grains based on length, disc separators are more compact and operate at higher speeds, utilizing centrifugal force and pocket undercut designs (R-pockets) for separation.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Grain cleaning and grading operations rely on physical properties such as length, width, shape, or surface texture to separate desirable grains from weed seeds and contaminants.

Step 2: Detailed Explanation:
- A disc separator (commonly the Carter disc separator) consists of a series of rotating vertical discs mounted on a horizontal shaft inside a chamber.
- The sides of these discs are cast with hundreds of undercut pockets (specifically designated as R-pockets or V-pockets).
- As the discs rotate through the grain mass, smaller/desirable grains fit into these pockets and are lifted up and discharged into a separate hopper, while larger weed seeds or longer grains remain behind, achieving highly precise length-based separation.

Step 3: Final Answer:
R-pockets are present in a Disc separator, which corresponds to option (A).