Question

Match List - I with List - II.

List - I (Spinning System)	List - II (Production Speed (range) (meters/min))
A. Ring B. Rotor C. Air jet D. Friction	I. 400-500 II. 150-450 III. 20-30 IV. 100-300

• A. A-III, B-IV, C-I, D-II
• B. A-III, B-IV, C-II, D-I
• C. A-IV, B-III, C-I, D-II
• D. A-I, B-II, C-III, D-IV

Hint:

To remember production speeds, order the systems from most mechanical (slowest) to most pneumatic/friction-based (fastest): Ring < Rotor < Air Jet < Friction.

Answer 1

The Correct Option is B

Concept: The production speed of different spinning systems varies significantly based on the twisting mechanism. Conventional ring spinning is limited by traveler speed, whereas modern systems like rotor, air-jet, and friction spinning achieve much higher speeds by separating the twisting and winding functions.

Step 1: Analyzing Ring and Rotor Spinning.
Ring spinning is the slowest due to mechanical limitations (traveler speed and ring friction), typically ranging between 20-30 m/min. Rotor spinning is faster as it utilizes a high-speed rotor, generally operating in the 100-300 m/min range.

Step 2: Analyzing Air-jet and Friction Spinning.
Air-jet spinning uses compressed air to wrap fibers, reaching speeds of 150-450 m/min. Friction spinning (DREF) is known for very high production rates, often between 400-500 m/min.

Step 3: Matching the Lists.
Based on these industrial standards: A-III (Ring: 20-30), B-IV (Rotor: 100-300), C-II (Air jet: 150-450), D-I (Friction: 400-500).