Question

In jet dyeing machine

• A. Both fabric and liquor will be moving
• B. Liquor stationary and fabric will be moving
• C. Fabric is stationary and liquor will be moving
• D. Fabric and liquor are stationary

Hint:

• Jet Dyeing Machine Principle
  • Fabric (usually in rope form) is actively circulated.
  • Dye liquor is pumped at high velocity through jets, impinging on and propelling the fabric.
• Therefore, both fabric and liquor are in motion} and interact dynamically.
• This ensures good liquor-to-fabric interchange, rapid dyeing, and levelness.

Answer 1

The Correct Option is A

A jet dyeing machine is designed for dyeing fabric, typically in rope form, using jets of dye liquor. The key principle of operation is:

• The fabric rope is circulated through the machine.
• High-velocity jets of dye liquor are impinged onto the fabric rope.

This means: Option (A) The fabric moves: It is transported through the dyeing vessel, often by a combination of the liquor jets and a lifter reel or winch. Option (B) The liquor moves: The dye liquor is pumped at high pressure through nozzles to create jets that impinge on the fabric. This liquor is also circulated through a heat exchanger and back to the jets. So, in a jet dyeing machine, both the fabric and the dye liquor are moving. This dynamic interaction ensures rapid liquor interchange, good penetration of dye, and helps to keep the fabric rope open and prevent tangling, leading to level dyeing. Comparing with other machine types:

• Winch: Fabric moves, liquor is relatively stationary (agitated by fabric movement and convection). (Option b like)
• Jigger: Fabric moves (back and forth), liquor is largely stationary in a trough. (Option b like for each pass)
• Package dyeing: Yarn/fabric is stationary, liquor is pumped through it. (Option c like)
• Padding: Fabric moves, liquor is in a trough.

Option (a) correctly describes the situation in a jet dyeing machine. \[ \boxed{\text{Both fabric and liquor will be moving}} \]