1. Joseph Aspdin prepared cement in
(A) 1834
(B) 1824
(C) 1814
(D) 1854
2. Chemically, cement is a mixture of silicates and aluminates of
(A) Ca
(B) Mg
(C) Mn
(D) Sr
3. ……….Cement is prepared from chalk and clay free from iron oxide
(A) Slag
(B) White
(C) Waterproof
(D) Silica
4. …….Controls the setting time of cement
(A) Gypsum
(B) Lime
(C) Clay
(D) Chalk
5. A normal batch of cement consists of ……… limestone
(A) 75%
(B) 50%
(C) 65%
(D) 85%
6. ………is used in the manufacturing of cement
(A) Blast furnace
(B) Rotary kiln
(C) Tank furnace
(D) Bessemer converter
7. Chemically, Gypsum is
(A) MgSO4
(B) CaSO4
(C) BaSO4
(D) FeSO4
8. The amount of …….is 62% in cement
(A) CaO
(B) Al2O3
(C) MgO
(D) SO3
9. The length of rotary kiln is ……… meter
(A) 50–75
(B) 10–50
(C) 60–90
(D) 90–120
10. The diameter of rotary kiln is ……… meter
(A) 1–1.5
(B) 2–3.5
(C) 6–7.5
(D) 5–6.5
11. ………is not present in white cement
(A) Iron oxide
(B) Copper oxide
(C) Calcium oxide
(D) Magnesium oxide
12. CaSO4·2H2O is the formula of
(A) Lime
(B) Clay
(C) Gypsum
(D) Chalk
13. Process of ……... plays a very important role in setting and hardening of cement
(A) Curing
(B) Annealing
(C) Cladding
(D) Screening
14. The amount of silicon dioxide in cement is
(A) 22%
(B) 11%
(C) 33%
(D) 44%
15. The quantity of gypsum in cement is
(A) 2%
(B) 8%
(C) 5%
(D) 7%
16. The process of hydration means
(A) Addition of H2
(B) Addition of H2O
(C) Removal of H2
(D) Removal of H2O
17. The angle of rotary kiln with the ground is
(A) 3°
(B) 5°
(C) 10°
(D) 15°
18. The rotary kiln rotates at the rate of …….. circles per minute
(A) 1–2
(B) 3–4
(C) 5–6
(D) 6–7
19. ………Cement is used in marble and mosaic work
(A) Slag
(B) White
(C) Waterproof
(D) Silica
20. The process of clinker formation takes place at …….. temperature
(A) 1450–1600°C
(B) 1500–1700°C
(C) 1500–1600°C
(D) 1300–1450°C