Building Materials problems
- 1. Softer variety of steel may be obtained by
Options- A. Cementation process
- B. crucible process
- C. Bessemer process
- D. Open hearth process. Discuss
Correct Answer: Bessemer process
- 2. Pick up the correct statement from the following:
Options- A. Slaked lime contains calcium hydroxide
- B. Quick lime contains calcium oxide
- C. Slaked lime may be obtained from quick lime
- D. Slaked lime is obtained by adding water to quick lime
- E. All the above. Discuss
Correct Answer: All the above.
- 3. Cement paints usually
Options- A. contain hydrated lime
- B. contain 5% to 10% colour pigments
- C. are prepared with white cement
- D. contain 5% sodium chloride
- E. all the above. Discuss
Correct Answer: all the above.
- 4. Calcination of iron ores is done
Options- A. to remove moisture
- B. to remove carbonic acid
- C. by roasting in heaps
- D. after dressing
- E. all the above. Discuss
Correct Answer: all the above.
- 5. PVC stands for
Options- A. plastic very compact
- B. polythene vinyl chloride
- C. polythene vinyl carbon
- D. polythene vanadium carbide. Discuss
Correct Answer: polythene vinyl chloride
- 6. Pig iron is manufactured from the ores by
Options- A. dressing
- B. calcination and roasting
- C. smelting
- D. all the above. Discuss
Correct Answer: all the above.
- 7. Invar contains
Options- A. 12% of nickel
- B. 24% of nickel
- C. 30% to nickel
- D. 36% of nickel. Discuss
Correct Answer: 36% of nickel.
- 8. The percentage of water for normal consistency, is
Options- A. 5% to 15%
- B. 10% to 25%
- C. 15% to 25%
- D. 20% to 30%
- E. 25% to 35%. Discuss
Correct Answer: 15% to 25%
- 9. The initial setting time of hydraulic lime, is
Options- A. 30 minutes
- B. 60 minutes
- C. 90 minutes
- D. 120 minutes
- E. 150 minutes. Discuss
Correct Answer: 120 minutes
- 10. Plywood is obtained by gluing wooden sheets at
Options- A. 100 to 150 N/cm2
- B. 100 to 130°C
- C. both (a) and (b)
- D. Neither (a) nor (b). Discuss
Correct Answer: both (a) and (b)
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