1. Which of the following can be ensured by Proper proportioning of concrete?
Resistance to water
Water tightness of the structure
Desired durability
All of above
All of above
2. Which is/are existing as minor components of cement?
NaO
MgO
KO
All of above
All of above
3. What is the proportion of lime, alumina, or silica for good cement?
1.9 to 4.5
2.5 to 3.5
1.9 to 3.5
1.9 to 2.5
1.9 to 2.5
4. Which of the following are the chemical compounds that are added to reduce the reactivity of glass?
Stabilizers
Modifiers
Additives
None of these
Stabilizers
5. Which of the following statements is/are correct with regard to hydraulic cement?
It is insoluble in water after setting
It has the ability to set and develop strength in the air
It is stable in air and water
All of these
All of these
6. The main component of glass is:
Silica
Silicon
Caustic
Alumina
Silica
7. What is Clinker?
Roasted calcareous material
Roasted argillaceous material
Roasted calcareous and argillaceous material
Roasted gypsum
Roasted calcareous and argillaceous material
8. Cement is a mixture of ______.
Clay and clinker
Limestone and gypsum
Clay, limestone, and gypsum
Limestone and clay
Clay, limestone, and gypsum
9. What is the percentage of the composition of the mixture of clay and limestone in the raw material for cement?
15% limestone and 55% clay
50% limestone and 50% clay
75% limestone and 25% clay
30% limestone and 15% clay
75% limestone and 25% clay
10. Rotary spinning process is used to produce ____.
Glass marble
Optical fiber
Glass wool
All of above
Glass wool
11. What is the average amount of lime in the cement?
81.5%
26.2%
61.5%
41.5 %
61.5%
12. What is the average amount of silica in the cement?
42.5 %
63.5%
22.5%
22.5%
22.5%
13. Gets higher strength
14. Which is the correct chemical equation representing the production of glass?
Na2CO3+ SiO2 → 2Na2SiO3 + CO2
Na2CO3+ SiO2 → Na2SiO3+2C02
Na2CO3+2SiOg → NagSiO3 + CO2
Na2CO3 + SiO2 → Na2SiO3 + CO2
Na2CO3 + SiO2 → Na2SiO3 + CO2
15. The glass industry needs soda ash with ____
Solids density 1.80 and bulk density 0.58
Solids density 2.36 and bulk density 0.6
Solids density 1.91 and bulk density 1.0
None of these
Solids density 1.91 and bulk density 1.0
16. Most commercial glasses consist of ________.
Silica
Soda
Lime
All above
Lime
17. Which is/are the major ingredients of glass?
Silica
Lime
Soda ash
All of above
All of above
18. The pieces of waste glass are known as cullet. Which statement is with concern to cullet?
It is used to facilitate melting
It is broken pieces of glass
It helps to utilize the wastes
All of these
All of these
19. Which type of glass is transparent to UV light?
Lead glass
Window glass
Quartz glass/fused quartz
Flint glass
Quartz glass/fused quartz
20. Which of the following glass contains boron trioxide?
Quartz glass/fused quartz
Pyrex glass/sodium borosilicate glass
Window glass
Flint glass
Pyrex glass/sodium borosilicate glass
21. Which glass is used to make artificial gems, lenses, prisms, etc.?
Quartz glass/fused quartz
Flint glass
Pyrex glass/sodium borosilicate glass
Window glass
Flint glass
22. Which of the following is the mixture of potassium and sodium silicate?
Water glass
Quartz glass/fused quartz
Pyrex glass/sodium borosilicate glass
Flint glass
Water glass
23. Glaze surface is ______surface.
(A) Crack surface
(B) Porous Surface
(C) Smooth surface
(D) None of above
Smooth surface
24. Lead glass comprises main constituents of which of the following?
Al2O3 and B203
MgO2PbO and CaO
PbO and SiO2
PbO and Al2O3
PbO and Al2O3
25. Windows glass contains silica % of _______.
87%
50%
39%
72%
87%
26. Which of the following is used for Annealing?
Converter
Batch
Klin
Klin
27. The main constituents of _______ are born, oxide, and silica.
Fibrous glass
Soda-lime glass
Low silica glass
Pyrex glass
Pyrex glass
28. The word ‘ceramic’ is meant for ____?
Burnt material
Hard material
Soft material
Dry material
Burnt material
29. Which is not a characteristic property of ceramic material?
High temperature stability
Low hardness
Low elongation
High mechanical strength
High mechanical strength
30. Which of the following is the major ingredient of traditional ceramics?
Clay
Silica
Feldspar
All above
All above
31. In safety glasses many layers of glass are bound together with
Transparent adhesives
Glue
Gum
Wire
Transparent adhesives
32. Which of the following glass is used in laboratory wares?
(A) Pyrex
(B) lead glass
(C) clear glass
(D) Laminated glass
Pyrex
33. Which of the following is used as stabilizer?
NaCl
SiO2
Na2O
Cao
Cao
34. In glass making, the whole combination of ingredients is called _____.
Batch
Mixture
Gangue
None of these
Batch
35. The melting of nearly all glass is done in a continuous tank furnace, which operates steadily over periods of up to
An hour
A month
A day
A week
A day
36. Which of the following is a heat-treatment cycle that prevents glass from harmful stress?
Forming
Batching
Annealing
None of these
Annealing
37. Which of the following is not a major contributor to engineering ceramics?
SiO2
SiC
Si3N4
Al2O3
SiO2
38. In glass or vitreous state solid the atoms are arranged in which fashion?
Regular fashion
Linear fashion
Random fashion
None of these
Random fashion
39. For quality control of Portland cement, the test essentially done is
Setting time
Soundness
Tensile strength
All of above
All of above
40. Which raw material is not present in the cement?
Limestone
Gypsum
Blast furnace slag
Red lead
Red lead
41. What is the average amount of alumina in the cement?
7.5%
28.5 %
21.5%
14.5%
28.5 %
42. To obtain cement dry powder, lime stones and shale or their slurry, is burnt in a rotary kiln at a temperature between
1300° and 1500°C
1200° and 1700°C
1400 and 1500°C
1300 and 1400°C
1400 and 1500°C
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