Question
The speed of rotor in the open end spinning system influences the ________ in the yarn.
This question was previously asked in
CUET PG 2026 Agri-Business Management Question Paper (25-Mar-2026) (Shift 2)
The correct answer is
fibre configuration and twist level
Rotor Speed Impact on Open-End Yarn Properties
In open-end spinning, the speed of the rotor is a critical parameter that directly influences how fibres are collected, aligned, and twisted to form the yarn.
Core Influence Mechanism
- Fibre Configuration: Higher rotor speeds generally lead to better alignment of fibres around the axis of the yarn, influencing the yarn's regularity and strength. The centrifugal force imparted by the rotor speed dictates how fibres are arranged.
- Twist Level: The rotor speed is directly proportional to the rate at which twist is inserted into the yarn. A faster rotor speed results in a higher twist per unit length in the yarn.
Analysis of Options
- Fibre breakage: While excessive rotor speed can contribute to fibre damage, it's not the primary factor the speed is adjusted for.
- Hooks removal: This is primarily influenced by earlier processes like carding, not the rotor speed itself.
- Fibre configuration and twist level: This option accurately captures the main effects of rotor speed, impacting both how fibres are arranged and the amount of twist introduced.
- Fibre wrapping: This relates more to the mechanism of yarn formation in other spinning systems or specific yarn types, not the direct consequence of rotor speed in standard open-end spinning.
Therefore, the rotor speed fundamentally determines the fibre configuration and the final twist level of the yarn produced in an open-end spinning system.
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