Question

Match List-I with List-II

List-I (Name of the machine or components in a seed processing unit) & List-II (Type of operation it does)
(A) Electric color sorter & (II) Separates off-colored seeds
(B) Inclined draper & (IV) Separation of smooth or round seeds from rough, flat, or
& elongated seeds
(C) Pneumatic separator & (I) Separate heavy seeds from lightweight materials or chaffy grains
(D) Disc separator & (III) Size grade of seeds for precision planting

• (A) - (II), (B) - (I), (C) - (III), (D) - (IV)
• (A) - (I), (B) - (II), (C) - (IV), (D) - (III)
• (A) - (II), (B) - (IV), (C) - (I), (D) - (III)
• (A) - (III), (B) - (IV), (C) - (I), (D) - (II)

Hint:

To remember seed processing machinery:
- Color Sorter: Photoelectric cells for color separation (A $\rightarrow$ II).
- Inclined Draper: Gravity and friction on a canvas belt for shape/texture separation (B $\rightarrow$ IV).
- Pneumatic Aspirator: Air flow for density/weight separation (C $\rightarrow$ I).

Answer 1

The Correct Option is C

Step 1: Understanding the Concept:
Seed processing involves cleaning, drying, treating, and upgrading seeds to remove impurities, inert matter, diseased seeds, and weed seeds.
Various specialized seed processing machines are used, operating on physical differences in seed length, width, weight, shape, surface texture, and color.

Step 2: Detailed Explanation:
Let us match each processing machine in List-I with its function in List-II:
- (A) Electric color sorter $\rightarrow$ (II) Separates off-colored seeds:
This machine utilizes photoelectric sensors to detect and reject off-colored, diseased, or discolored seeds based on their light reflectance, ensuring uniform color and quality.
- (B) Inclined draper $\rightarrow$ (IV) Separation of smooth or round seeds from rough, flat, or elongated seeds:
This machine consists of an inclined moving canvas belt.
It separates seeds based on their shape and surface texture: smooth, round seeds easily roll down the belt, while rough, flat, or elongated seeds cling to the canvas and are carried upward.
- (C) Pneumatic separator $\rightarrow$ (I) Separate heavy seeds from lightweight materials:
This machine utilizes controlled air currents to separate seeds based on their terminal velocity (weight-to-aerodynamic-drag ratio), removing light chaff, hollow seeds, and lightweight debris from heavy, healthy seeds.
- (D) Disc separator $\rightarrow$ (III) Size grade of seeds for precision planting:
This machine contains a series of rotating discs with pockets on their surface. It is used to separate seeds precisely based on their length, which is crucial for grading seeds to ensure uniform size.
This results in the sequence: (A)-(II), (B)-(IV), (C)-(I), (D)-(III).

Step 3: Final Answer:
The correct matching sequence is (A) - (II), (B) - (IV), (C) - (I), (D) - (III).