Building Materials problems
- 1. Laterite is found in
Options- A. U.P.
- B. Punjab
- C. West Bengal
- D. Kerala. Discuss
Correct Answer: U.P.
- 2. Spirit varnish generally consists of
Options- A. oil, wax and resin
- B. alcohol, wax and turpentine
- C. pigment and synthetic resin
- D. spirit and shellac
- E. none of these. Discuss
Correct Answer: spirit and shellac
- 3. Pick up the correct statement from the following:
Options- A. Blistering may be cured by applying water paint finished with oil paint dried with a little copal varnish
- B. Cracked paints may be cured by removing paint and giving a fresh coat of paint
- C. Crawling paints may be cured by sand preparing the surface and giving a fresh coat with plenty of turps
- D. All the above. Discuss
Correct Answer: All the above.
- 4. Pick up the compound responsible for early strength of cement from the following:
Options- A. Tetra-calcium alumino-ferrite
- B. Tricalcium silicate
- C. Tricalcium aluminate
- D. Dicalcium silicate. Discuss
Correct Answer: Tricalcium silicate
- 5. Pick up the correct statement from the following:
Options- A. Melamine is obtained from calcium carbide
- B. Formaldehyde is prepared synthetically from methane
- C. The melamine when reacted with formaldehyde forms the melamine-formaldehyde resin
- D. The plastics made from melamine formaldehyde resin, are used for electrical insulators
- E. All the above. Discuss
Correct Answer: All the above.
- 6. Duco paints are
Options- A. plastic paints
- B. cellulose paints
- C. emulsion paints
- D. bituminous paints
- E. oil paints. Discuss
Correct Answer: oil paints.
- 7. Upto a maximum of 72% of iron, is available in
Options- A. Magnetite
- B. Red haemetite
- C. Limonite
- D. Siderite
- E. Iron pyrites. Discuss
Correct Answer: Magnetite
- 8. Pick up the correct statement from the following:
Options- A. Roasting is not necessary if iron ore is an oxide
- B. Impurities float on the molten iron as slag
- C. The slag contains lime about 45%
- D. The molten iron is made to run, in a long channel formed in sand called 'sow'
- E. All the above. Discuss
Correct Answer: All the above.
- 9. The melting point of silica is :
Options- A. 1570°C
- B. 1630°C
- C. 1730°C
- D. 1850°C. Discuss
Correct Answer: 1730°C
- 10. The yield strength and tensile strength of low carbon steel may be improved by the addition of
Options- A. manganese
- B. chromium
- C. nickel
- D. venadium
- E. tungsten. Discuss
Correct Answer: venadium
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