1000+ Building Materials MCQ for SSC CPO [Solved]

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

2. Pick up the correct statement from the following:
A. Melamine is obtained from calcium carbide
B. Formaldehyde is prepared synthetically from methane
C. The melamine when reacted with formaldehyde forms the melamineformaldehyde resin
D. All the above
Answer : D

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

4. 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

5. The main function of alumina in brick earth is
A. To impart plasticity
B. To make the brick durable
C. To prevent shrinkage
D. To make the brick impermeable
Answer : A

6. The plywood
A. Has good strength along the panel only
B. Can be spilt in the plane of the panel
C. Has greater impact resistance to blows than ordinary wood
D. Cannot be bent more easily than ordinary wood of same thickness
Answer : C

7. Ground glass
A. Is made by grinding its one side
B. Is made by melting powdered glass paints surface
C. Is used for getting light without transparency
D. All the above
Answer : D

8. Blister steel
A. Is obtained by cementation process
B. Is full of fissures and cavities
C. Can be easily welded
D. All the above
Answer : D

9. 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

10. 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

11. 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

12. The normal consistency of ordinary Portland cement is about
A. 10 %
B. 20 %
C. 30 %
D. 40 %
Answer : C

13. Pick up the correct statement from the following:
A. Styrene resin is produced from ethylene which is made from petroleum
B. Styrene resin is light in weight
C. Styrene resin transmits ultraviolet waves of light
D. All the above
Answer : D

14. Bulking of sand is caused due to
A. Surface moisture
B. Air voids
C. Viscosity
D. Clay contents
Answer : A

15. A 1st class brick immersed in water for 24 hours, should not absorb water (by weight) more than
A. 10 %
B. 15 %
C. 20 %
D. 25 %
Answer : C

16. The main constituent which imparts hydraulicity to hydraulic lime is
A. Calcium oxide
B. Silica
C. Clay
D. Water
Answer : C

17. For testing compressive and tensile strength of cement, the cement mortar is made by mixing cement and standard sand in the proportions of
A. 1 : 2
B. 1 : 3
C. 1 : 4
D. 1 : 6
Answer : B

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

19. Permanent magnets are made of high carbon steel and
A. 15% of cobalt
B. 20% of cobalt
C. 35% of cobalt
D. 45% of cobalt
Answer : D

20. 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

21. Upto a maximum of 72% of iron, is available in
A. Magnetite
B. Limonite
C. Siderite
D. Iron pyrites
Answer : A

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

23. 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

24. 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

25. Crushing strength of a good building stone should be more than
A. 50 MPa
B. 100 MPa
C. 150 MPa
D. 200 MPa
Answer : B

26. Elastomers can extend upto
A. Five times their original dimensions
B. Seven times their original dimensions
C. Ten times their original dimensions
D. Three times their original dimensions
Answer : C

27. Smith's test of stones is performed to find out
A. The presence of soluble matter of stone
B. The compressive strength of the stone
C. The hardness of the stone
D. The toughness of the stone
Answer : A

28. 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

29. Which of the following is a mineral?
A. Basalt
B. Granite
C. Quartz
D. Syenite
Answer : C

30. 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

31. Pick up the correct statement from the following:
A. Catalysts are added to assist and accelerate the hardening of resin
B. The fillers are inert materials and they impart strength and hardness
C. Fibrous fillers increase thermal resistance
D. All the above
Answer : D

32. According to ISI, bitumen is classified into
A. 2 grades
B. 4 grades
C. 8 grades
D. 10 grades
Answer : D

33. Expanded metal is
A. Manufactured from steel sheets
B. Used for reinforced concrete in road pavements
C. Measured in term of SWM (short way mesh) and LWM (long way mesh)
D. All the above
Answer : D

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

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

36. 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

37. 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

38. For a good building stone, its specific gravity should the greater than
A. 1.5
B. 1.7
C. 2.2
D. 2.7
Answer : D

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

40. Plywood has the advantage of
A. Greater tensile strength in longer direction
B. Greater tensile strength in shorter direction
C. Same tensile strength in all directions
D. None of the above
Answer : C

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

42. 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

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

44. Red short iron cracks when bent due to the presence of
A. Sulphur
B. Carbon
C. Phosphorus
D. Silicon
Answer : A

45. 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

46. 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

47. Rocks formed due to alteration of original structure due to heat and excessive pressure are called
A. Sedimentary rocks
B. Igneous rocks
C. Metamorphic rocks
D. None of these
Answer : C

48. Index number expressing the relative sizes of both coarse and fine aggregates, is called
A. Proportioning of aggregates
B. Fineness modulus
C. Grading of aggregates
D. None of these
Answer : B

49. 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

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