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- Question
The operation of removal of impurities or clay adhering to iron ores, is known as
Options- A. dressing
- B. calcination
- C. roasting
- D. smelting.
- Correct Answer
- dressing
- 1. Pick up the correct statement from the following:
Options- A. Plastics have generally low melting point
- B. The coefficient of thermal expansion of plastics is about three times than that of steel
- C. The acoustical boards prepared by impregnating fibre-glass with phenolic resins has absorption coefficient of about 0.67
- D. All the above. Discuss
- 2. Duco is one of the patent forms of
Options- A. emulsion paints
- B. plastic paints
- C. bituminous paints
- D. aluminium paints
- E. cellulose paints. Discuss
- 3. Formula for quick lime, is
Options- A. CaCO3
- B. CaO
- C. CO3CO2
- D. none to these. Discuss
- 4. Iron ore may contain
Options- A. carbon
- B. silicon
- C. sulphur
- D. phosphorus and maganese
- E. all the above. Discuss
- 5. In paints, the pigment is responsible for
Options- A. durability
- B. colour
- C. smoothness
- D. glassy face
- E. none of these. Discuss
- 6. The weight of 1 m3 of brick earth, is about
Options- A. 1200 kg
- B. 1500 kg
- C. 1800 kg
- D. 2000 kg. Discuss
- 7. Pick up the correct statement from the following:
Options- A. The substance which consists of one primary chemical, is known as monomer
- B. The polymer consists of thousands of monomers joined together
- C. The polymer molecule is called macro-molecule
- D. A polymetric material consists of a large number of long-chain molecules
- E. All the above. Discuss
- 8. Dextrin is
Options- A. animal glue
- B. starch glue
- C. albumin glue
- D. rubber based adhesive
- E. none to these. Discuss
- 9. Pozzolana (or surkhi) is used in lime
Options- A. to impart hydraulicity
- B. to prevent shrinkage
- C. to decrease the cost of construction
- D. to decrease the setting time. Discuss
- 10. Quick setting cement is produced by adding
Options- A. less amount of gypsum in very fine powdered form
- B. more amount of gypsum in very fine powdered form
- C. aluminium sulphate in very fine powdered form
- D. pozzolana in very fine powdered form
- E. none of these. Discuss
Building Materials problems
Search Results
Correct Answer: All the above.
Correct Answer: cellulose paints.
Correct Answer: CaO
Correct Answer: all the above.
Correct Answer: colour
Correct Answer: 1800 kg
Correct Answer: All the above.
Correct Answer: rubber based adhesive
Correct Answer: to impart hydraulicity
Correct Answer: aluminium sulphate in very fine powdered form
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