Building Materials MCQ Solved Paper for ESIC

1. The nominal size of the modular brick is
A. 190 mm × 90 mm × 80 mm
B. 190 mm × 190 mm × 90 mm
C. 200 mm × 100 mm × 100 mm
D. 200 mm × 200 mm × 100 mm
Answer : C

2. Pick up the volcanic rock from the following:
A. Granite
B. Dolerite
C. Basalt
D. All the above
Answer : C

3. First class timber has an average life of
A. Less than one year
B. 1 to 5 years
C. 5 to 10 years
D. More than 10 years
Answer : D

4. The main constituent of cement which is responsible for initial setting of cement is
A. Di-calcium silicate
B. Tri-calcium silicate
C. Tri-calcium aluminate
D. All of the above
Answer : C

5. A mortar joint in masonry which is normal to the face of wall is known as
A. Bed joint
B. Wall joint
C. Cross joint
D. Bonded joint
Answer : C

6. The low voltage porcelain is mainly used for
A. Switch block
B. Insulating tubes
C. Lamp sockets
D. All of these
Answer : D

7. Pick up the correct statement from the following:
A. In basic Bessemer process, the steel heats the converter
B. In open-hearth process, the furnace heats the steel
C. In Siemens process, the impurities of pig iron are oxidised by the oxygen of the ore
D. All the above
Answer : D

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

9. Which of the following sedimentary rocks changes into quartzite by metamorphic action?
A. Sand stone
B. Lime stone
C. Shale
D. Gypsum
Answer : A

10. The most important constituent of varnish, is
A. Drier
B. Solvent
C. Resin
D. All the above
Answer : D

11. Duco paints are
A. Plastic paints
B. Cellulose paints
C. Emulsion paints
D. Oil paints
Answer : D

12. To give a brilliant finish, the type of varnish used, is
A. Water varnish
B. Spirit varnish
C. Turpentine varnish
D. Oil varnish
Answer : B

13. The base material for distemper, is
A. Chalk
B. Lime
C. Lime putty
D. Cement wash
Answer : A

14. If the furnace is provided with insufficient fuel at low temperatures, the type of pig iron produced, is called
A. Bessemer pig
B. Grey or foundry pig
C. White or forge pig
D. Mottled pig
Answer : C

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

16. Strength of cement concrete primarily depends upon
A. Quality of water
B. Quantity of aggregate
C. Quantity of cement
D. Water-cement ratio
Answer : D

17. Quick lime (or caustic lime)
A. Is obtained by the calcination of pure lime stone
B. Has great affinity to moisture
C. Is amorphous
D. All the above
Answer : D

18. 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

19. A good building stone should not absorb water more than
A. 5 %
B. 10 %
C. 15 %
D. 20 %
Answer : A

20. The minimum compressive strength of 2nd class bricks should be
A. 75 kg/cm²
B. 90 kg/cm²
C. 100 kg/cm²
D. 120 kg/cm²
Answer : A

21. The rocks in which argil (or clay) predominates, are called
A. Siliceous rocks
B. Argillaceous rocks
C. Calcareous rocks
D. Igneous rocks
Answer : B

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

23. Pick up the correct statement from the following:
A. Hornblende mineral is brittle
B. Muscovite is also known as white mica and potash mica
C. Biotite is also known as black-mica
D. All the above
Answer : D

24. 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

25. In a rock calcium carbonate predominates. State whether it is:
A. Siliceous rock
B. Argillaceous rock
C. Calcareous rock
D. None of these
Answer : C

26. Hydraulic lime is obtained by
A. Burning of lime stone
B. Burning of kankar
C. Adding water to quick lime
D. Calcination of pure clay
Answer : B

27. The preparation of surface of stone to obtain plain edges or to obtain stones of required size and shape is known as
A. Quarrying of stones
B. Blasting of stones
C. Seasoning of stones
D. Dressing of stones
Answer : D

28. According to IS specifications, the compressive strength of ordinary Portland cement after three days should not be less than
A. 7 MPa
B. 11.5 MPa
C. 16 MPa
D. 21 MPa
Answer : C

29. The rocks formed from molten magma, are called
A. Sedimentary rocks
B. Igneous rocks
C. Metamorphic rocks
D. None of these
Answer : B

30. 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

31. Asbestos
A. Is a natural fibrous mineral substance
B. Is composed of hydrous silicates of calcium and magnesium (CaSiO₃, 3MgSiO₃)
C. Contains iron oxide and alumina
D. All the above
Answer : D

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

33. Quartzite is a
A. Metamorphic rock
B. Argillaceous rock
C. Calcareous rock
D. Siliceous rock
Answer : D

34. The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively:
A. 15, 75, 10
B. 75, 10, 15
C. 10, 15, 75
D. 10, 75, 15
Answer : A

35. In stone masonry, if stones are so placed that their layers are parallel to the direction of load, they
A. Split easily
B. Are affected by moisture
C. Both (A) and (B)
D. None of these
Answer : C

36. Pick up the correct statement from the following:
A. The heating of a material to redness in contact with air, is known as calcination
B. The property of lime by which it sets or hardens in damp places having no free circulation of air is called setting
C. The product that remains after calcination of limestone, is called lime
D. All the above
Answer : D

37. Specific gravity for most of the building stones lies between
A. 1.5 to 2.0
B. 2.0 to 2.5
C. 2.5 to 3.0
D. 3.0 to 3.5
Answer : C

38. Which of the following bricks are used for lining of furnaces?
A. Over-burnt bricks
B. Under-burnt bricks
C. Refractory bricks
D. First class bricks
Answer : C

39. The commonly used drying oil for oil paints, is
A. Olive oil
B. Linseed oil
C. Kerosene oil
D. Acetate of lead
Answer : D

40. Pick up the correct statement from the following:
A. Alexander Parkes, a Scottish chemist prepared a hard material by mixing camphor and alcohol with nitro cellulose and called it, as Parkesite
B. Dr. L. Bakeland, a Belgian scientist prepared a product known as Bakelite
C. Pollark, an Austrian scientist prepared a substance from urea and formaldehyde and called it Plastic
D. All the above
Answer : D

41. Glazing is used to make earthenware
A. Hard
B. Soft
C. Porous
D. Impervious
Answer : D

42. 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

43. Stucco paints are suitable for
A. Stone masonry
B. Brick walls
C. Both (A) and (B)
D. Neither (A) nor (B)
Answer : C

44. 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

45. Percentage content of silica in window glass, is
A. 40 to 45
B. 50 to 55
C. 60 to 65
D. 70 to 75
Answer : D

46. Lime stone is not a
A. Sedimentary rock
B. Stratified rock
C. Aqueous rock
D. Metamorphic rock
Answer : D

47. Compared to mild steel, cast iron has (i) High compressive strength (ii) High tensile strength (iii) Low compressive strength (iv) Low tensile strength The correct answer is
A. (i) and (ii)
B. (ii) and (iii)
C. (iii) and (iv)
D. (i) and (iv)
Answer : D

48. For sanitary pipes and chemical stonewares,
A. Salt glazing is used
B. Lead glazing is used
C. Opaque glazing is used
D. None of these
Answer : A

49. Refractory bricks are used for
A. Retaining walls
B. Columns
C. Piers
D. Combustion chambers
Answer : D

50. The specific gravity of marble, is
A. 2.50
B. 2.60
C. 2.66
D. 2.72
Answer : D