Building Materials MCQ Solved Paper for IBPS PO

1. 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

2. During pudding
A. Molten metal is kept clear of the fuel
B. Carbon is converted into carbonic acid gas
C. Silicon forms a slag
D. All the above
Answer : D

3. French polish is
A. Oil paint
B. Distemper
C. Spirit varnish
D. None to these
Answer : C

4. The curved swellings from the growth of layers or wounds left after branches are cut off in an irregular manner are known as
A. Knots
B. Rindgalls
C. Burls
D. None of these
Answer : B

5. Soundness of cement is tested by
A. Vicat's apparatus
B. Le-chatelier apparatus
C. Compressive strength testing apparatus
D. None of these
Answer : B

6. A bull nose brick is not used for
A. Rounding off sharp corners
B. Pillars
C. Decoration purpose
D. Arches
Answer : D

7. Most commonly used solvent in oil paints, is
A. Petroleum
B. Spirit
C. Coal tar
D. Turpentine
Answer : A

8. Granite is not suitable for ordinary building purpose because
A. It cannot be polished
B. It is not a fire proof material
C. It is costly
D. It has less crushing strength
Answer : C

9. After storage, the strength of cement
A. Decreases
B. Increases
C. Remains same
D. May increase or decrease
Answer : A

10. The material generally not used as extender in paints, is
A. Powdered silica
B. Gypsum
C. Talc
D. Zinc white
Answer : D

11. The commonly used base for iron and steel work, is
A. Red lead
B. Zinc white
C. White lead
D. Titanium white
Answer : A

12. Clay and silt content in a good brick earth must be at least
A. 50 %
B. 40 %
C. 30 %
D. 25 %
Answer : A

13. If P is the percentage of water required for normal consistency, water to be added for determination of initial setting time, is
A. 0.70 P
B. 0.75 P
C. 0.80 P
D. 0.85 P
Answer : D

14. The constituent of cement which is responsible for all the undesirable properties of cement is
A. Di-calcium silicate
B. Tri-calcium silicate
C. Tri-calcium aluminate
D. Tetra calcium alumino ferrite
Answer : C

15. The trunk of tree left after cutting all the branches is known as
A. Log
B. Batten
C. Plank
D. Baulk
Answer : A

16. Mastic asphalt is
A. Water proof
B. Fire proof
C. Elastic
D. All the above
Answer : D

17. Dry rot
A. Cracks the timber
B. Reduces the strength of timber
C. Reduces the timber to powder
D. Spoils the appearance of timber
Answer : C

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

19. The most commonly used synthetic abrasive is
A. Aluminium carbide
B. Boric acid
C. Silicon
D. All of these
Answer : D

20. 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

21. The portion of the brick cut across its width and having its length equal to that of a full brick, is known as
A. Closer
B. Queen closer
C. King closer
D. Prince closer
Answer : B

22. Which of the following stone is best suited for construction of piers and abutments of a railway bridge?
A. Granite
B. Sand stone
C. Lime stone
D. Quartzite
Answer : A

23. 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

24. Pick up the polymineralic rock from the following:
A. Quartz sand
B. Pure gypsum
C. Magnesite
D. Granite
Answer : D

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

26. The stones obtained by blasting are used as
A. Ballast in railways
B. Aggregates for concrete
C. Road metal
D. All the above
Answer : D

27. Asbestos
A. Is an excellent insulator for heat and electricity
B. Is fire-proof and acid proof
C. Has sp. gravity equal to 3.10
D. All the above
Answer : D

28. The plastics prepared from Vinyl resin are
A. Odourless
B. Non-toxic
C. Transparent
D. All of these
Answer : D

29. The cracks caused by shrinkage of the exterior surface of the wood exposed to atmosphere, are called:
A. Radial shakes
B. Heart shakes
C. Wind cracks
D. Twisted fibres
Answer : C

30. The kiln which may work throughout the year, is
A. Clamp
B. Bull's kiln
C. Hoffman's kiln
D. None of these
Answer : C

31. Based on the following rocks and minerals, select the correct statement, quartz, shale, basalt, granite, marble, gypsum, mica
A. Basalt and marble are the only metamorphic rocks
B. There is no sedimentary rock
C. Granite is the only igneous rock
D. Quartz and mica are minerals
Answer : D

32. The initial setting time for ordinary Portland cement as per IS specifications should not be less than
A. 10 minutes
B. 30 minutes
C. 60 minutes
D. 600 minute
Answer : B

33. Plastic asphalt is
A. Used as a water proofing layer over roof
B. A mixture of cement and asphalt
C. A natural asphalt
D. A refinery product
Answer : B

34. Which of the following timbers is suitable for making sports goods?
A. Mulberry
B. Mahogany
C. Sal
D. Deodar
Answer : A

35. Assertion A : Normally turpentine oil is recommended as thinner for indoor painting. Reason R : Turpentine oil is costlier than other thinners. Select your answer according to the coding system given below:
A. Both A and R is true and R is the correct explanation of A
B. Both A and R is true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true
Answer : B

36. A heavy stone is suitable for
A. Arches
B. Rubble masonry
C. Roads
D. Retaining walls
Answer : D

37. Pick up the correct statement from the following:
A. The plastic bottles are made by the process of blowing
B. The application of thermo-setting resins on sheets of paper, is called laminating process
C. The plastic articles made by placing raw material in the desired moulds, is known as moulding process
D. All the above
Answer : D

38. For light and ornamental casting, the most unsuitable pig iron, is
A. Bessemer pig
B. Grey or foundry pig
C. White or forge pig
D. Mottled pig
Answer : D

39. Assertion A : Paints with white lead base are not recommended for painting of iron works. Reason R : Paints with white lead base do not check rusting of iron. Select your answer according to the coding system given below:
A. Both A and R is true and, R is the correct explanation of A
B. Both A and R is true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true
Answer : A

40. Pick up the correct statement from the following:
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. All the above
Answer : D

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

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

43. 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

44. For a 50 kg cement bag water required, is
A. 16.5 litres
B. 18.5 litres
C. 20.5 litres
D. 22.5 litres
Answer : D

45. Apiece of sawn timber whose cross-sectional dimensions exceed 5 cm, in one direction and 20 cm in the other direction, is called a
A. Cant
B. Deal
C. Baulk
D. Strip
Answer : C

46. 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

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

48. 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

49. Pick up the constituent of good brick earth whose excess causes the raw bricks shrink and warp during drying and burning, from the following:
A. Alumina
B. Lime
C. Iron-oxide
D. Magnesia
Answer : A

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