The minimum number of fibres required for a yarn cross section is
In a yarn manufacturing process, the cleaning index of a machine is defined as
Where DF = the direct content of the feed material
DD = the direct content of the delivered material.
The ratio of the fabric area covered by the yarn to the total fabric area is called
Among the following treatment process 90% of BOD of effluent can be reduced by
The fatigue resistance of cord fabric materials is high for
The pore radius of a filter by bubble point cannot be calculated using the parameter