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 a combine harvester, which component separates the loose grain trapped in the mass of threshed straw before discharging the straw from the rear of the machine?
Options:
(A) Straw walker
(B) Chaffer sieve
(C) Tailings auger
(D) Feeder conveyor
Answer Key:
A
Step-by-Step Solution & Explanation
The straw walker consists of oscillating perforated racks that agitate the discharged straw, allowing entrained loose grain kernels to fall through onto the grain pan while conveying the straw out of the rear.