1000+ Building Materials Multiple Choice Question Answer [Solved]

1. Cast iron contains carbon approximately
A. 1.5% to 5.5%
B. 0.05% to 1.75%
C. 0.250 %
D. None to these
Answer : A

2. 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
Answer : A

3. The coefficient of hardness of stones used in road work should be greater than
A. 10
B. 12
C. 15
D. 17
Answer : D

4. Pick up the correct statement from the following:
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
Answer : D

5. According to IS 399-1963, the weight of the timber is specified at
A. 8% moisture content
B. 10% moisture content
C. 12% moisture content
D. 14% moisture content
Answer : C

6. Pick up the correct statement from the following:
A. Slaked lime contains calcium hydroxide
B. Quick lime contains calcium oxide
C. Slaked lime may be obtained from quick lime
D. All the above
Answer : D

7. The cement becomes unsound by the presence of excess
A. Sulphur
B. Magnesia
C. Lime
D. All of these
Answer : D

8. The age of a tree can be known by examining
A. Cambium layer
B. Annular rings
C. Medullary rays
D. Heart wood
Answer : B

9. Resins are
A. Not soluble in water
B. Soluble in spirit
C. Used in varnishes
D. Left behind on evaporation of oil
Answer : C

10. Pick up the correct statement from the following:
A. The low voltage porcelain is prepared by wet process
B. The high voltage porcelain is prepared by dry process
C. The low voltage porcelain is prepared by dry process
D. None of the above
Answer : C

11. Fibre glass
A. Retains heat-longer
B. Has a higher strength to weight ratio
C. Is shock proof and fire retardant
D. All the above
Answer : D

12. In a mortar, the binding material is
A. Cement
B. Sand
C. Surkhi
D. Cinder
Answer : A

13. Forge pig may be converted to wrought iron by
A. Rolling
B. Pudding
C. Shingling
D. Refining
Answer : B

14. Durability of building stone is affected by its
A. Chemical composition
B. Texture
C. Resistance to atmosphere
D. All the above
Answer : D

15. A queen closer is a
A. Brick laid with its length parallel to the face or direction of wall
B. Brick laid with its breadth parallel to the face or direction of wall
C. Brick having the same length and depth as the other bricks but half the breadth
D. Brick with half the width at one end and full width at the other
Answer : C

16. Manganese steels
A. Are non-magnetic
B. Possess high electrical resistance
C. Possess low coefficient of expansion
D. All the above
Answer : D

17. Excess of silica in brick earth results in
A. Cracking and warping of bricks
B. Loss of cohesion
C. Enhancing the impermeability of bricks
D. None of the above
Answer : B

18. For high grade instruments the steel preferred to, is
A. Cast steel
B. Bessemer steel
C. Mild steel
D. Whitworth compressed steel
Answer : A

19. The steel used in R.C.C. work is
A. Stainless steel
B. Mild steel
C. High carbon steel
D. Wrought iron
Answer : B

20. Teak wood is suitable for
A. Sports articles
B. Furnitures
C. Railway sleepers
D. All the above
Answer : B

21. Which one of the following polymers is obtained from condensation polymerization?
A. Phenol formaldehyde
B. Carbamide
C. Melamine-formaldehyde
D. All of these
Answer : D

22. Cement is said to be of good quality if
A. Its colour is not greenish grey
B. One feels cool by thrusting one's hand in the cement bag
C. A handful of cement thrown into a bucket of water does not float
D. None of these
Answer : D

23. The most important constituent of an oil paint, is
A. Thinner
B. Vehicle
C. Pigment
D. All the above
Answer : D

24. Pick up the correct characteristic of Pyroxene from the following:
A. It forms octagonal crystals
B. It converts to chlorine by hydration
C. Its density is 2.3 to 3.6 g/cm²
D. All the above
Answer : D

25. The main ingredients of Portland cement are
A. Lime and silica
B. Lime and alumina
C. Silica and alumina
D. Lime and iron
Answer : A

26. The main ingredient of a good quality brick earth, is
A. Magnesia
B. Lime
C. Silica
D. Alumina
Answer : D

27. Softer variety of steel may be obtained by
A. Cementation process
B. Crucible process
C. Bessemer process
D. Open hearth process
Answer : C

28. For slaking of 10 kg of CaO, the theoretical amount of water is
A. 2.2 kg
B. 1.5 kg
C. 3.2 kg
D. None of these
Answer : C

29. Granite mainly composed of quartz and feldspar particles, is obtained from
A. Sedimentary rocks
B. Metamorphic rocks
C. Igneous rocks
D. All the above
Answer : C

30. When a brick is immersed in water for 24 hours and then dried, if
A. No grey or white deposits appear on the surface, the brick is free from soluble salts
B. 10 percent surface is covered with grey or white deposits, the brick has slight efflorescence
C. 50 percent surface is covered with grey or white deposits, the brick has serious efflorescence
D. All the above
Answer : D

31. Quick lime is (i) Slow in setting (ii) Rapid in slacking (iii) Good in strength The correct answer is
A. Only (i)
B. Only (ii)
C. Both (i) and (ii)
D. Both (ii) and (iii)
Answer : C

32. The commonly used raw material in the manufacture of cement, is
A. Slate
B. Sand stone
C. Lime stone
D. Basalt
Answer : C

33. As per IS specifications, the maximum final setting time for ordinary Portland cement should be
A. 30 minutes
B. 1 hour
C. 6 hours
D. 10 hours
Answer : D

34. Stones used for the construction of retaining walls must be
A. Soft
B. Hard
C. Light
D. Heavy
Answer : D

35. Pick up the synthetic resin from the following:
A. Urea resin
B. Phenolic resin
C. Resorcinol resin
D. All of these
Answer : D

36. Study the following statements. (i) Hydraulic lime is suitable for white washing, (ii) Fat lime is suitable for whitewashing, (iii) Hydraulic lime is suitable for making mortar, (iv) Fat lime is suitable for making mortar. The correct answer is
A. (i) and (iv)
B. (ii) and (iii)
C. (i) and (ii)
D. (iii) and (iv)
Answer : B

37. The rock generally used for roofing, is
A. Granite
B. Basalt
C. Slate
D. Pumice
Answer : C

38. Mastic asphalt is normally used for
A. Sound insulation
B. Water proofing
C. Fire proofing
D. None to these
Answer : B

39. For preparing porcelains, the clay should be
A. Sufficiently pure
B. Of high degree of tenacity
C. Of good plasticity
D. All the above
Answer : D

40. The steel used for the manufacture of rails, is
A. Bessemer steel
B. Mild steel
C. Cast steel
D. Stainless steel
Answer : A

41. Plywood is made by bonding together thin layers of wood in such a way that the angle between grains of any layer to grains of adjacent layers is
A. 0°
B. 30°
C. 45°
D. 90°
Answer : D

42. Quick setting cement is produced by adding
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
Answer : C

43. Plaster of Paris is obtained by calcining
A. Bauxite
B. Gypsum
C. Lime stone
D. None of these
Answer : B

44. Cement paints usually
A. Contain hydrated lime
B. Contain 5% to 10% colour pigments
C. Contain 5% sodium chloride
D. All the above
Answer : D

45. Plastic
A. Is an organic substance
B. Consists of natural or synthetic binders
C. Finished products are rigid and stable at normal temperature
D. All the above
Answer : D

46. Cast iron is used for
A. Structural works in beams
B. Small sized water pipes
C. Columns and struts
D. None to these
Answer : C

47. Sea sand used in structures causes
A. Dampness
B. Efflorescence
C. Disintegration
D. All of these
Answer : D

48. The softest rock is
A. Marble
B. Diamond
C. Talc
D. Quartz
Answer : C

49. Pick up the correct statement from the following:
A. The theory of formation of concrete is based on the phenomena of formation of voids
B. The bulking of sand is taken into account while volumetric proportioning of the aggregates
C. The dry sand and the sand completely flooded with water, have practically the same volume
D. All the above
Answer : D

50. For the manufacture of plywood, veneers are placed so that grains of adjacent veneers
A. Run at right angles
B. Parallel
C. Inclined at 45°
D. Inclined at 60°
Answer : A