Concept:
Looms are categorized by the method they use to carry the weft yarn through the warp shed. Traditional looms use a "shuttle" (a wooden carrier), while modern high-speed industrial looms use "shuttle-less" technology to increase production efficiency and reduce noise.
Step 1: Identify modern shuttle-less mechanisms.
• Projectile loom (A): Uses a small, bullet-like metal gripper to carry the yarn across.
• Rapier loom (D): Uses long rods or flexible tapes (rapiers) to pull the weft yarn through the shed.
• Air jet loom (E): Uses a high-pressure blast of air to propel the weft yarn across the loom.
Step 2: Identify traditional shuttle-based looms.
• Pit loom (B): A traditional handloom where the weaver sits with their legs in a pit; it uses a manual shuttle.
• Treadle loom (C): A handloom operated by foot pedals that also utilizes a shuttle.
Step 3: Conclusion.
Since A, D, and E utilize modern mechanical carriers instead of a traditional shuttle, they are classified as shuttle-less looms.