1000+ Building Materials Multiple Choice Question Answer [Solved]

1. The hardest rock is
A. Marble
B. Diamond
C. Talc
D. Quartz
Answer : B

2. The slag which floats on the surface of the molten iron generally contains
A. Lime (CaO) 45%
B. Silica (SiO₂) 35%
C. Alumina (Al₂O₃) 12% and MgO, CaSO₄, KMnO₂ and FeO 8%
D. All the above
Answer : D

3. The slenderness ratio for masonry walls should not be more than
A. 10
B. 20
C. 30
D. 40
Answer : B

4. Pegmatite is a/an
A. Intrusive igneous rock
B. Extrusive igneous rock
C. Sedimentary rock
D. Metamorphic rock
Answer : A

5. The cracks which extend from bark towards the sap wood in the cross section of a tree, are called
A. Radial shakes
B. Star shakes
C. Heart shakes
D. Cup shakes
Answer : B

6. The commonly used thinner in oil paints, is
A. Naphtha
B. Turpentine
C. Both (a) and (b)
D. None the these
Answer : C

7. 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

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

9. The variety of pig iron used for the manufacture of steel by Bessemer process, is
A. Bessemer pig
B. Grey pig
C. White forge pig
D. Mottled pig
Answer : A

10. The steel used for rails under heavy traffic and on sharp curves, is
A. Nickel steel
B. Chrome steel
C. Manganese steel
D. Vanadium steel
Answer : C

11. 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

12. 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

13. Mastic asphalt is
A. Acid resisting material
B. Non-corrosive material
C. Corrosive material
D. Heating-resisting material
Answer : B

14. German silver is an alloy of
A. Zinc, lead and nickel
B. Silver, gold and lead
C. Copper, nickel and zinc
D. Copper, brass and zinc
Answer : C

15. A well seasoned timber may contain moisture up to
A. 4 to 6 %
B. 6 to 8 %
C. 8 to 10 %
D. 10 to 12 %
Answer : D

16. Which of the following metamorphic rocks has the most weather resisting characteristics?
A. Marble
B. Quartzite
C. Slate
D. Lime stone
Answer : B

17. Vanadium steel is generally used for
A. Railway switches and crossing
B. Bearing balls
C. Magnets
D. Axles and springs
Answer : D

18. Initial setting time of cement for asbestos cement products should be not less than
A. 30 minutes
B. 50 minutes
C. 75 minutes
D. 90 minutes
Answer : D

19. A badly mixed cement concrete results in
A. Segregation
B. Bleeding
C. Honey combing
D. None of these
Answer : C

20. The stretcher bond in brick masonry can be used only when the thickness of wall is
A. 90 mm
B. 180 mm
C. 190 mm
D. 280 mm
Answer : A

21. Pick up the correct statement from the following:
A. Air bubbles in casting produce a dull sound by tapping their surfaces lightly with a hammer
B. Cupola furnace is used for the manufacture of cast iron
C. Red short iron is of no value for welding purpose
D. All the above
Answer : D

22. Pick up the correct statement from the following:
A. The plywoods do not split or crack due to changes in atmosphere
B. The commercial plywoods are available upto 150 cm wide and upto 300 cm long
C. The plywoods possess uniform tensile strength in all directions
D. All the above
Answer : D

23. Which one of the following is an air binding material?
A. Gypsum
B. Acid-resistant cement
C. Quick lime
D. All of these
Answer : D

24. Pick up the correct statement from the following:
A. Quick lime is obtained by burning pure lime stone
B. Hydraulic lime is obtained by burning lime stone containing clay 5% to 30%
C. Poor lime is obtained by burning lime stone containing impurities more than 5%
D. All the above
Answer : D

25. Seasoning of timber is done for
A. Increasing moisture content
B. Decreasing moisture content
C. Increasing strength of timber
D. None to these
Answer : B

26. The lime which contains high percentage of calcium oxide, is generally called
A. Fat lime
B. Rich lime
C. White lime
D. None of these
Answer : D

27. A pug mill is used for
A. Softening brick earth
B. Moulding brick earth
C. Tempering brick earth
D. Providing brick earth
Answer : C

28. 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

29. Knots in timber are
A. Defects caused by crushing fibres
B. Splits radiating from the centre
C. Speckled strains
D. Signs of branches cut off
Answer : D

30. Bitumen paints offer
A. Pleasing surface
B. Hard surface
C. Smooth surface
D. Protective surface
Answer : D

31. Acrylic is the name of
A. Cellulose resin
B. Alkyd resin
C. Methyl methacrylate
D. Cumarone-indene
Answer : C

32. Generally wooden moulds are made from
A. Ply wood
B. Shishum wood
C. Deodar wood
D. Teak wood
Answer : B

33. Linseed oil is used in paints as
A. Thinner
B. Vehicle
C. Base
D. Drier
Answer : D

34. In brick masonry the bond produced by laying alternate headers and stretchers in each course is known as
A. English bond
B. Double Flemish bond
C. Zigzag bond
D. Single Flemish bond
Answer : B

35. If water required for 1 bag of cement is 30 litres, the water cement ratio is:
A. 0.40
B. 0.50
C. 0.60
D. None of these
Answer : C

36. Which of the following cements contains maximum percentage of dicalcium silicate?
A. Ordinary Portland cement
B. Low heat cement
C. Rapid hardening cement
D. Sulphate resisting cement
Answer : B

37. Dorry's testing machine is used for
A. Crushing test of stone
B. Hardness test of stone
C. Impact test of stone
D. Water absorption test
Answer : B

38. Jhumb bricks are
A. Under burnt
B. Over burnt
C. Kutcha
D. None of these
Answer : B

39. Advantage of a clamp compared to a kiln for burning bricks is that
A. It takes less time for burning
B. It gives more output of first class bricks
C. It has less initial cost
D. It is suitable when bricks are required in large numbers
Answer : C

40. Fibre boards can be
A. Distempered
B. Painted
C. Painted and distempered
D. Used for furniture
Answer : D

41. Seasoning is
A. A process of removing sap
B. Creosoting
C. Painting with sodium silicate
D. Coating with tar
Answer : A

42. Pick up the rock which is not a sedimentary rock from the following:
A. Gravel
B. Sand stone
C. Gypsum
D. Dolerite
Answer : D

43. The timber having maximum resistance against white ants, is obtained from
A. Chir
B. Shishum
C. Sal
D. Teak
Answer : B

44. Gypsum is a
A. Mechanically formed sedimentary rock
B. Igneous rock
C. Chemically precipitated sedimentary rock
D. Metamorphic rock
Answer : C

45. Soundness test of cement determines
A. Quality of free lime
B. Ultimate strength
C. Durability
D. Initial setting
Answer : A

46. Pick up the correct statement from the following:
A. Adding 5% to 6% of moisture content by weight, increases the volume of dry sand from 18% to 38%
B. The bulking of fine sand is more than that of coarse sand
C. If the percentage content of moisture exceeds 10%, increase in bulk of sand starts increasing
D. All the above
Answer : D

47. PVC stands for
A. Plastic very compact
B. Polythene vinyl chloride
C. Polythene vinyl carbon
D. Polythene vanadium carbide
Answer : B

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

49. The pressure acting on the stones in stone masonry construction should be
A. Along the direction of bedding planes
B. At 45° to the direction of bedding planes
C. At 60° to the direction of bedding planes
D. Perpendicular to the direction of bedding planes
Answer : D

50. The size of modular bricks, is
A. 10 × 10 × 9 cm
B. 19 × 9 × 9 cm
C. 22.5 × 10 × 8.5 cm
D. 22.5 × 8.0 × 9 cm
Answer : B