Double acting dobby will nearly produce,Question 12Answera.Semi Open Shedb.Center Closed Shedc.Bottom Closed Shedd.Open Shed

The double acting dobby is a type of weaving mechanism used in looms. It is designed to produce a variety of shed formations, which are crucial for the weaving process. The term "shed" refers to the space created when the warp threads are lifted to allow the weft thread to pass through.

Explanation of Shed Types

1. Semi Open Shed: This configuration allows for some level of thread movement and is used for producing certain types of patterns.

2. Center Closed Shed: This shed is created by lifting the warp threads from the center and would be less common in dobby mechanisms.

3. Bottom Closed Shed: In this case, the bottom threads remain closed, which may limit the types of patterns produced.

4. Open Shed: This configuration allows for maximum space for the weft to pass through, facilitating the weaving process.

Conclusion

The double acting dobby typically produces an Open Shed (option d), which allows for greater flexibility and efficiency in the weaving process compared to the other shed types.

Therefore, the correct answer is: d. Open Shed.