GATE (TF) Textile 1997 Question Paper Solution | GATE/1997/TF/07 Question 7 (Textile Engineering & Fibre Science) Birefringence of typical polyester filament is (A) 0.18 (B) 0.12 (C) 0.16 (D) 2.0 Answer / Solution Previous Question Next Question Frequently Asked Questions | FAQs GATE Textile Engineering and Fibre Science (TF) Question Papers | GATE Textile Question Answer | GATE Textile Solved Question Papers | GATE Textile Papers | GATE Textile Answer Key