Building Materials problems
- 1. Pick up the correct statement from the following:
Options- A. The phenol is carbolic acid
- B. The phenol is either extracted from coal-tar or prepared from benzene
- C. Phenol reacts with formaldehyde, to form phenol formaldehyde resin
- D. The plastics prepared from phenol-formaldehyde are used for paints, varnishes, w.c. seats
- E. All the above. Discuss
Correct Answer: All the above.
- 2. Pick up the correct statement from the following:
Options- A. Solder material is an alloy which melts at a temperature above 400°C
- B. Brazing is done at temperature above 600°C to 1100°C
- C. Brazing joint is stronger than the solder joint
- D. all the above. Discuss
Correct Answer: all the above.
- 3. Pick up correct statement from the following:
Options- A. Fibre boards are used for thermal and acoustic control
- B. Fibre boards are used for light weight standing members
- C. Fibre boards are obtained by impregnating a resin product on fibres
- D. all the above. Discuss
Correct Answer: all the above.
- 4. Dry rot
Options- A. cracks the timber
- B. reduces the strength of timber
- C. reduces the timber to powder
- D. shrinks the timber
- E. spoils the appearance of timber. Discuss
Correct Answer: reduces the timber to powder
- 5. Portland cement manufactured from pure white chalk and clay but free from iron-oxide, is known as
Options- A. quick setting cement
- B. rapid hardening cement
- C. white cement
- D. low heat Portland cement. Discuss
Correct Answer: white cement
- 6. German silver is an alloy of
Options- A. zinc, lead and nickel
- B. silver, gold and lead
- C. copper, nickel and zinc
- D. copper, brass and zinc
- E. brass, silver and zinc. Discuss
Correct Answer: copper, nickel and zinc
- 7. The silica is used for preparing
Options- A. silica bricks
- B. coke oven
- C. lining for glass furnaces
- D. all of these. Discuss
Correct Answer: all of these.
- 8. The normal curing period for lime mortar, is:
Options- A. one day
- B. 3 days
- C. 7 days
- D. 10 days
- E. 14 days. Discuss
Correct Answer: 7 days
- 9. Pick up the correct statement from the following:
Options- A. Quick lime is obtained by burning pure lime stone:
- B. Hydraulic lime is obtained by burning lime stone containing clay 5% to 30%
- C. Poor lime is obtained by burning lime stone containing impurities more than 5%
- D. All the above. Discuss
Correct Answer: All the above.
- 10. Pick up the correct statement from the following:
Options- A. Corrugated sheet iron is made by passing plain sheets between grooved rollers
- B. Strength and stiffness of corrugated sheets are considerably increased
- C. Corrugated sheets are generally gal-venised to protect iron from corrosion by rust
- D. Corrugated sheets are generally used on slanting roofs
- E. all the above. Discuss
Correct Answer: all the above.
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