1. ………Is a super cooled rigid inorganic liquid
(A) Cement
(B) Glass
(C) Refractories
(D) Clay bricks
2. ……..Is the mixture of silicates of alkali and alkaline earth metals
(A) Cement
(B) Glass
(C) Abrasives
(D) Clay bricks
3. The given approximate formula (xR2O·yMO·6SiO2) is of
(A) Sand
(B) Cement
(C) Abrasive
(D) Glass
4. The raw material used up to 70–75% in the manufacturing of glass is …….
(A) Sand
(B) Lime
(C) Soda ash
(D) Borax
5. ……….facilitates the melting of raw materials of glass
(A) Cullet
(B) Borax
(C) Lime
(D) Arsenous oxide
6. The manufacturing of glass is made in …
(A) Tank furnace
(B) Blast furnace
(C) Rotary kiln
(D) Bessemer converter
7. To remove bubbles of gas from the viscous solution of glass is called …
(A) Shaping
(B) Melting
(C) Finning
(D) Conditioning
8. The process of slow and homogeneous cooling of glass product is called …
(A) Annealing
(B) Curing
(C) Conditioning
(D) Cladding
9. ………..process occurs in the Tank Furnace
(A) Melting
(B) Finning
(C) Conditioning
(D) All of these
10. The process of making solution of glass more viscous is called …
(A) Melting
(B) Conditioning
(C) Finning
(D) Annealing
11. Broken pieces of glass used in the manufacture of glass are called …
(A) Cullet
(B) Feldspar
(C) Borax
(D) All of these
12. ………..is mostly used in the manufacturing of laboratory apparatus
(A) Pyrex glass
(B) Lead glass
(C) Fibre glass
(D) Quartz glass
13. The percentage of cullet in the raw material of glass is …
(A) 10–20%
(B) 10–30%
(C) 10–35%
(D) 10–50%
14. The refractive index of ………….is more
(A) Safety glass
(B) Optical glass
(C) Lead glass
(D) Soda glass
15. The process that helps to remove the inner strain of glass is called …
(A) Annealing
(B) Finning
(C) Conditioning
(D) Moulding
16. In ……… the percentage of B2O3 is 13–28%
(A) Quartz glass
(B) Lead glass
(C) Pyrex glass
(D) Borosilicate glass
17. Glass is called soft glass
(A) Soda glass
(B) Flint glass
(C) Water glass
(D) Quartz glass
18. The cost for the manufacture of glass curtails down with the use of
(A) Zinc oxide
(B) Red lead
(C) Cullet
(D) Arsenous oxide
19. …….. Glass is also called Jena glass
(A) Water glass
(B) Flint glass
(C) Pyrex
(D) Quartz glass
20. The cheapest variety of glass is known as
(A) Water glass
(B) Soda glass
(C) Flint glass
(D) Quartz glass