Subtopic: Functional requirements, principles of working, construction and operation of manual, animal, tractor and renewable energy operated equipment for tillage, sowing, planting, fertilizer application, inter-cultivation, spraying, mowing, chaff cutting, harvesting and threshing
Question Statement:
In combine harvester cleaning systems, the function of the chaffer sieve is to:
Options:
(A) Permit threshed grain to fall through while pneumatic airflow floats chaff and unthreshed heads off the rear
(B) Grind the grain into flour
(C) Filter engine oil
(D) Compress straw into square bales
Answer Key:
A
Step-by-Step Solution & Explanation
The oscillating chaffer allows heavy grain to drop through its adjustable louvers onto the cleaning shoe sieve while blower air floats light chaff away.