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