In a jacquard harness system, the vertical distance between the bottom end of the central hook and the comber board is 140 cm

###### Question 81 (Textile Engineering & Fibre Science)

If the required shed depth of this machine is 7 cm, the percentage loss in shed depth at the same side harness operated by the same hook would be approximately

(A) | 13.3 |

(B) | 12.3 |

(C) | 11.3 |

(D) | 10.3 |

**[Show Answer]**

Option C is correct.

Previous-

Vertical distance between bottom end of the central hook and comber board(O)=140 cm

Distance of an end operated by harness card from centre(A)=75 cm

By formula-

Length of harness cord(H)=158.8 cm

Now,

If required shed depth of the machine(L)=7 cm

The percentage loss in shed depth at the same side harness operated by the same hook=?

So, Vertical distance between bottom end of the central hook and comber board(O’)=140+7

O’=147 cm

Now,

H’=165.03 cm

Calculated Shed depth(L’)=H’-H

=165.03-158.8

L’=6.23 cm

% loss in shed depth at the same side=(L-L’) x 100/L

% loss in shed depth at the same side=(7-6.23) x 100/7

% loss in shed depth at the same side=0.77 x 100/7

% loss in shed depth at the same side=11 (Ans)