Building Materials problems
- 1. The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively:
Options- A. 15, 75, 10
- B. 75, 10, 15
- C. 10, 15, 75
- D. 10, 75, 15. Discuss
Correct Answer: 15, 75, 10
- 2. Resins are
Options- A. not soluble in water
- B. soluble in spirit
- C. used in varnishes
- D. left behind on evaporation of oil
- E. all the above. Discuss
Correct Answer: used in varnishes
- 3. Inhaling of fly-ash over a long period causes
Options- A. silicosis
- B. fibrosis of lungs
- C. bronchitis
- D. pneumonitis
- E. All of these. Discuss
Correct Answer: All of these.
- 4. The slag which floats on the surface of the molten iron generally contains
Options- A. Lime (CaO) 45%
- B. Silica (SiO2) 35%
- C. Alumina (Al2O3) 12%
- D. MgO, CaSO4, KMnO2 and FeO 8%
- E. all the above. Discuss
Correct Answer: all the above.
- 5. The commonly used lime in white washing, is
Options- A. white lime
- B. fat lime
- C. hydraulic lime
- D. lime
- E. quick lime. Discuss
Correct Answer: fat lime
- 6. Pick up the correct statement from the following:
Options- A. Alexander Parkes, a Scottish chemist prepared a hard material by mixing camphor and alcohol with nitro cellulose and called it, as Parkesite
- B. Dr. L. Bakeland, a Belgian scientist prepared a product known as Bakelite
- C. Pollark, an Austrian scientist prepared a substance from urea and formaldehyde and called it Plastic
- D. All the above. Discuss
Correct Answer: All the above.
- 7. A badly mixed cement concrete results in
Options- A. segregation
- B. bleeding
- C. honey combing
- D. none to these. Discuss
Correct Answer: honey combing
- 8. Minimum of 40% of iron, is available in
Options- A. Magnetite
- B. Red haemetite
- C. Limonite
- D. Siderite
- E. Black band. Discuss
Correct Answer: Black band.
- 9. Name the type of cement from the following for canal linings :
Options- A. sulphate resisting cement
- B. rapid hardening cement
- C. quick setting cement
- D. pozzuolana cement. Discuss
Correct Answer: sulphate resisting cement
- 10. Shingle is
Options- A. decomposed laterite
- B. crushed granite
- C. water bound pebbles
- D. air weathered rock. Discuss
Correct Answer: decomposed laterite
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