Question

The term used for the process of separation of grains from the chaff is

• A. Sieving
• B. Threshing
• C. Winnowing
• D. handpicking

Answer 1

The correct option is C

Winnowing

The correct option is C.

Explanation of the correct option:

1. The separating of grain from the chaff is a crucial harvesting step.
2. This can be accomplished in a variety of ways such as hand picking, sieving, and so on.
3. The primary goal is to eliminate contaminants from grains and produce usable goods.
4. Winnowing is an ancient method for the separation of grains from the chaff or husk.
5. Winnowing is based on the principle that a mixture of two components in which one component is lighter than another one when both components are exposed to a blow of air, separate by falling down the lighter component
6. The method involves the use of a winnowing fan or tool such as a winnowing fork or shovel such that the wind blown by the winnowing fan separates the grains from the chaff.
7. This method is also used to remove insect pests such as weevils from the stored grains.
8. Winnowing is a common method used by farmers for the separation of wheat grains from husk so that husk can be used as food for animals.

Explanation of the incorrect options:

Option A:

1. A sieve is a popular method for separating two components in everyday life by passing them through a sieving material or sieving apparatus.
2. Sieving may be seen in the usage of strainers to separate tea leaves from the water, as well as pepper mills and pepper.
3. The sieve works because big particles cannot pass through the sieve's perforations, but tiny particles can.

Option B:

1. Threshing is the process of beating out grains from the harvested plants.
2. It is used for separating grains or seeds from chaff or husk.
3. In this process, the grains or edible part of the crop is loosened but not the fiber part.

Option D:

1. Handpicking is the technique of separating grains or compounds from a mixture of components by picking them by hand.
2. It is used to separate somewhat larger-sized contaminants such as dirt, stones, and husk from wheat, rice, lentils, and other grains.

Final Answer: the term used for the process of separation of grains from the chaff is winnowing.