BPSC – Combined Competitive Examination · પ્રશ્ન 11
What is the fibre used to make bulletproof jackets?
જવાબ બતાવો અને સમજૂતી
જવાબ: (D) Kevlar
સમજૂતી
Kevlar (DuPont) is a para-aramid fibre about five times stronger than steel by weight.
- (A) ખોટો
Wrong: not strong enough to stop bullets.
- (B) ખોટો
Wrong: a polyester for clothing.
- (C) ખોટો
Wrong: a woollen fabric.
- (D) સાચો
Correct: Kevlar, an aramid fibre, has very high tensile strength.