Which one of the following equation is used to convert observed time into normal time in time study ?

Ratio of tensile strengths of woven and non-woven fabrics of GSM same would be

The circular weft knitting machine that rotates in clockwise direction demands 'z' twist yarn that 's' twist yarn because 'z' twist yarn

The Pressley index is the ratio between

The woven fabric air permeability is expressed in

The breaking load of a 200 denier multifilament yarn containing 130 filaments found to be 800 gram force. Its tensile strength in gram force/denier is