Subtopic: Specific gravity separator operating principles
Question Statement:
Which of the following operational parameters can be adjusted on a specific gravity separator to optimize separation of damaged/immature grains?
Options:
(A) Airflow rate through the porous deck (stratification fluidization)
(B) End-slope and side-slope tilt angles of the deck
(C) Oscillation speed (strokes per minute) and stroke length of the deck
(D) Color wavelength spectrum of the illumination lamps
Answer Key:
A, B, C
Step-by-Step Solution & Explanation
1. Upward air stratifies heavy grains down to the deck cloth while light grains float (A).
2. Longitudinal and transverse slope dictate discharge paths (B).
3. Eccentric drive oscillation conveys dense bottom layers up-slope towards high discharge (C).
4. A specific gravity separator is purely mechanical-pneumatic and does not use optical color sensors (D is false).