Building materials Archives

1. Which of the following represents a metamorphic rock? (i) Slate (ii) Shale (iii) Quartzite A. Only (iii) B. Both (i) and (iii) C. Both (ii) and (iii) D. All (i), (ii) and (iii)

Only (iii)

Both (i) and (iii)

Both (ii) and (iii)

All (i), (ii) and (iii)

Detailed SolutionWhich of the following represents a metamorphic rock? (i) Slate (ii) Shale (iii) Quartzite A. Only (iii) B. Both (i) and (iii) C. Both (ii) and (iii) D. All (i), (ii) and (iii)

2. The practical limit of moisture content achieved in air drying of timber is A. 5% B. 15% C. 25% D. 35%

15%

25%

35%

Detailed SolutionThe practical limit of moisture content achieved in air drying of timber is A. 5% B. 15% C. 25% D. 35%

3. Which of the following trees yields hard wood? A. Deodar B. Chir C. Shishum D. Pine

Deodar

Chir

Shishum

Pine

Detailed SolutionWhich of the following trees yields hard wood? A. Deodar B. Chir C. Shishum D. Pine

4. Commonly used thinner in A. Lacquer paints, is alcohol B. Cellulose paints is ethyl acetate C. Oil paints, is naphtha D. All the above

Lacquer paints, is alcohol

Cellulose paints is ethyl acetate

Oil paints, is naphtha

All the above

Detailed SolutionCommonly used thinner in A. Lacquer paints, is alcohol B. Cellulose paints is ethyl acetate C. Oil paints, is naphtha D. All the above

5. The yield strength and tensile strength of low carbon steel may be improved by the addition of A. Manganese B. Chromium C. Nickel D. Vanadium

Manganese

Chromium

Nickel

Vanadium

Detailed SolutionThe yield strength and tensile strength of low carbon steel may be improved by the addition of A. Manganese B. Chromium C. Nickel D. Vanadium

6. Rapid hardening cement attains early strength due to A. Larger proportion of lime grounded finer than normal cement B. Lesser proportion of lime grounded coarser than normal cement C. Lesser proportion of lime grounded finer than normal cement D. Excess percentage of gypsum

Larger proportion of lime grounded finer than normal cement

Lesser proportion of lime grounded coarser than normal cement

Lesser proportion of lime grounded finer than normal cement

Excess percentage of gypsum

Detailed SolutionRapid hardening cement attains early strength due to A. Larger proportion of lime grounded finer than normal cement B. Lesser proportion of lime grounded coarser than normal cement C. Lesser proportion of lime grounded finer than normal cement D. Excess percentage of gypsum

7. Due to attack of dry rot, the timber A. Cracks B. Shrinks C. Reduces to powder D. None of these

Cracks

Shrinks

Reduces to powder

None of these

Detailed SolutionDue to attack of dry rot, the timber A. Cracks B. Shrinks C. Reduces to powder D. None of these

8. The percentage of alumina and silica in good fire clay vary respectively is A. 25, 75 B. 30, 70 C. 35, 65 D. All of these

25, 75

30, 70

35, 65

All of these

Detailed SolutionThe percentage of alumina and silica in good fire clay vary respectively is A. 25, 75 B. 30, 70 C. 35, 65 D. All of these

9. Bitumen may be dissolved in A. Carbondioxide B. Water C. Sodium chloride D. Carbon disulphide

Carbondioxide

Water

Sodium chloride

Carbon disulphide

Detailed SolutionBitumen may be dissolved in A. Carbondioxide B. Water C. Sodium chloride D. Carbon disulphide

10. Portland cement manufactured from pure white chalk and clay but free from iron-oxide, is known as A. Quick setting cement B. Rapid hardening cement C. White cement D. Low heat Portland cement

Quick setting cement

Rapid hardening cement

White cement

Low heat Portland cement

Detailed SolutionPortland cement manufactured from pure white chalk and clay but free from iron-oxide, is known as A. Quick setting cement B. Rapid hardening cement C. White cement D. Low heat Portland cement