Question

Match List - I with List - II.

List - I (Weaving machine)	List - II (Weft insertion rate (meters/min))
A. Shuttle loom B. Rapier loom C. Projectile weaving machine D. Waterjet weaving machine	I. 2000 II. 300 III. 1000 IV. 1600

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

Hint:

Weft insertion rate is the best way to compare the productivity of different weaving technologies. Generally, the lighter the carrier (or if it uses fluid/air), the higher the insertion rate.

Answer 1

The Correct Option is A

Concept: The weft insertion rate (WIR) is a measure of the speed and productivity of a weaving machine. It is determined by the speed of the picking mechanism and the width of the loom.

Step 1: Evaluating Shuttle and Rapier Looms.
Shuttle looms are the slowest due to the mass of the shuttle, averaging 300 m/min. Rapier looms, which use rods or tapes to carry the yarn, significantly increase WIR to about 1000 m/min.

Step 2: Evaluating Waterjet and Projectile Machines.
Waterjet looms are very fast but limited to hydrophobic yarns, reaching 1600 m/min. Projectile machines (like Sulzer) can achieve very high WIR, often around 2000 m/min, due to multiple small projectiles.

Step 3: Matching the Lists.
A-II (Shuttle: 300), B-III (Rapier: 1000), C-I (Projectile: 2000), D-IV (Waterjet: 1600).