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:
The reel of a combine header is operated with a reel index ($K = v_{reel} / v_{forward}$) typically in the range of:
Options:
(A) $1.1\text{ to }1.25$
(B) $0.5\text{ to }0.7$
(C) $3.0\text{ to }4.0$
(D) $0.1\text{ to }0.2$
Answer Key:
A
Step-by-Step Solution & Explanation
Reel peripheral speed must slightly exceed ground speed ($K = 1.1 - 1.25$) to gently push standing stalks against cutterbar without shattering grains.