Building Materials MCQ Solved Paper for CAT

1. 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

2. Pick up the correct statement from the following:
A. The free quartz suddenly expands at a temperature lower than 600°C
B. The lime stone resists fire upto about 800°C and at higher temperature it splits into CaO and CO2
C. The sand stone with silicates resist a fire in a better way
D. All the above
Answer : D

3. 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

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

5. The rocks which are formed due to cooling of magma at a relatively shallow depth from the earth's surface are called
A. Plutonic rocks
B. Hypabyssal rocks
C. Volcanic rocks
D. Igneous rocks
Answer : B

6. The amount of water used for one kg of distemper is
A. 0.2 liter
B. 0.4 liter
C. 0.6 liter
D. 0.8 liter
Answer : C

7. Pick up the compound responsible for early strength of cement from the following:
A. Tetra-calcium alumino-ferrite
B. Tri-calcium silicate
C. Tri-calcium aluminate
D. Di-calcium silicate
Answer : B

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

9. Bitumen in
A. Solid state, is called asphalt
B. Semi fluid state, is called mineral tar
C. Fluid state, is called petroleum
D. All the above
Answer : D

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

11. 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

12. 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

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

14. The term frog means
A. An apparatus to lift the stone
B. A depression on a face of brick
C. Vertical joint in a brick work
D. Soaking brick in water
Answer : B

15. With storage, strength of cement
A. Increases
B. Decreases
C. Remains the same
D. None to these
Answer : B

16. Gypsum consists of
A. H?S and CO?
B. CaSO4 and H?O
C. Lime and H?O
D. CO? and calcium
Answer : B

17. 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

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

19. The frog of the brick in a brick masonry is generally kept on
A. Bottom face
B. Top face
C. Shorter side
D. Longer side
Answer : B

20. Pick up the correct statement from the following:
A. The baked earth is called terra-cotta
B. The articles prepared from clay which is burnt at low temperature and cooled down slowly, are called earthen-ware
C. The articles prepared from refractory clays which as mixed with stone and crushed pottery, are called stone ware
D. All the above
Answer : D

21. The process of manufacturing steel by heating short lengths of wrought iron bars mixed with charcoal in fire clay crucibles and collecting the molten iron into moulds, is known as
A. Cementation process
B. Crucible process
C. Bessemer process
D. Open hearth process
Answer : B

22. The most commonly used base for timber painting, is
A. Red lead
B. Zinc white
C. White lead
D. Titanium white
Answer : C

23. Plywood is normally available
A. 1 mm thick
B. 2 mm thick
C. 2 to 3 mm thick
D. 3 mm to 4 mm thick
Answer : D

24. Pick up the correct statement from the following:
A. Rusting is caused due to combined action of air, moisture and carbon dioxide
B. During rusting, first ferrous bicarbonates are formed
C. On further oxidation ferrous bicarbonates get converted to ferric bicarbonates
D. All the above
Answer : D

25. 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

26. Pick up the correct statement from the following:
A. The lime in excess makes the cement unsound and causes the cement to expand and disintegrate
B. The silica in excess makes the cement stronger but its setting time also increases
C. The excess amount of alumina weakens the cement
D. All the above
Answer : D

27. The moisture content in a well seasoned timber is
A. 4 % to 6 %
B. 10 % to 12 %
C. 15 % to 20 %
D. 100 %
Answer : B

28. 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

29. Pick up the correct statement from the following:
A. The average crushing strength of hand moulded bricks is 6000 t/m2
B. The average tensile strength of hand moulded brick is 200 t/m2
C. The average shearing strength of hand moulded brick is 600 t/m2
D. All the above
Answer : D

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

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

32. 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

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

34. 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

35. The silica is used for preparing
A. Silica bricks
B. Coke oven
C. Lining for glass furnaces
D. All of these
Answer : D

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

37. Plastics are compounds of carbon with element
A. Hydrogen
B. Nitrogen
C. Oxygen
D. All of these
Answer : D

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

39. Pick up the correct statement from the following:
A. For thin structures subjected to wetting and drying, the water cement ratio should be 0.45
B. For mass concrete structures subjected to wetting and drying, the water ratio should be 0.55
C. For thin structures which remain continuously under water, the watercement ratio by weight should be 0.55
D. All the above
Answer : D

40. Duco is one of the patent forms of
A. Emulsion paints
B. Plastic paints
C. Bituminous paints
D. Cellulose paints
Answer : D

41. 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

42. The melting point of silica is:
A. 1570°C
B. 1630°C
C. 1730°C
D. 1850°C
Answer : C

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

44. The most important tool in brick laying for lifting and spreading mortar and for forming joints is
A. Trowel
B. Square
C. Bolster
D. Scutch
Answer : A

45. 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

46. A prime coat is given to steel work with
A. An oxide of iron paint
B. A mixture of white lead and lead paint
C. A special paint
D. Cement paint
Answer : B

47. Percentage of carbon content in mild steel is
A. Less than 0.25
B. Between 0.25 and 0.7
C. Between 0.7 and 1.5
D. Greater than 1.5
Answer : A

48. The standard size of masonry bricks, is
A. 18 cm × 8 cm × 8 cm
B. 19 cm × 9 cm × 9 cm
C. 20 cm × 10 cm × 10 cm
D. 21 cm × 11 cm × 11 cm
Answer : B

49. The initial setting time of hydraulic lime, is
A. 30 minutes
B. 60 minutes
C. 90 minutes
D. 120 minutes
Answer : D

50. Mastic asphalt is generally used for
A. Damp proof course
B. Water proof layer
C. Partition walls
D. Both (A) and (B)
Answer : D