1. ‘Queen of fibres’ is
a) cotton
b) silk
c) rayon
d) wool
2. The gummy substance which coats the silk fibre is
a) pectin
b) glutin
c) sericin
d) all the above
3. Organzine silk is a
a) low - twist ply yarn
b) medium twist ply yarn
c) high - twist ply yarn
d) none of these
4. Tram silk is a
a) low - twist ply yarn
b) medium twist ply yarn
c) high - twist ply yarn
d) none of these
5. In silk, the process to where twist is inserted is termed as
a) Reeling
b) throwing
c) Spinning
d) degumming
6. Degumming is carried out to remove
a) pectin
b) gluten
c) sericin
d) none of the above
7. The resiliency of silk is
a) very good
b) good
c) moderate
d) poor
8. Silk is affected by
a) alkalies
b) acids
c) chlorine
d) all the above
9. The actual fibre protein in silk is
a) sericine
b) alanine
c) tyrosine
d) fiborin
10. Tyrex, employed in the manufacture of vehicle tyres is obtained from
a) rayon
b) acetate
c) nytril
d) vinyon