Building Materials MCQ Solved Paper for SSC JHT

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

2. Pick up the correct statement from the following:
A. Slaked lime contains calcium hydroxide
B. Quick lime contains calcium oxide
C. Slaked lime may be obtained from quick lime
D. All the above
Answer : D

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

4. For one cubic metre of brick masonry, number of bricks required, is
A. 400
B. 425
C. 450
D. 500
Answer : D

5. 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

6. 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

7. Good quality stones must
A. Be durable
B. Be free from clay
C. Resist action of acids
D. All the above
Answer : D

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

9. 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

10. Asbestos is
A. Corrugated sheet used for roofing
B. An incombustible fire proof material
C. An organic substance
D. All the above
Answer : D

11. Granite mainly composed of quartz and feldspar particles, is obtained from
A. Sedimentary rocks
B. Metamorphic rocks
C. Igneous rocks
D. All the above
Answer : C

12. Addition of pozzolana to ordinary Portland cement increases
A. Bleeding
B. Shrinkage
C. Permeability
D. Heat of hydration
Answer : B

13. Pick up the most favourable condition for the rapid growth of fungus for dry rot from the following:
A. Absence of sun light
B. Dampness
C. Presence of sap
D. All the above
Answer : D

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

15. Bitumen emulsion is
A. A liquid containing bitumen in suspension
B. A paint
C. Used as anti-corrosive paint
D. All the above
Answer : D

16. Pozzolana (or surkhi) is used in lime
A. To impart hydraulicity
B. To prevent shrinkage
C. To decrease the cost of construction
D. To decrease the setting time
Answer : A

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

18. 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

19. Due to attack of dry rot, the timber
A. Cracks
B. Shrinks
C. Reduces to powder
D. None of these
Answer : C

20. A rock contains only one mineral. It is called
A. Homogeneous
B. Non-homogeneous
C. Monomineralic
D. Polymineralic
Answer : C

21. Oil varnish generally consists of
A. Synthetic resin and spirit
B. Oil, wax and resin
C. Resin, oil and turpentine
D. Spirit, oil and wax
Answer : C

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

23. The rocks having alumina or clay as their major constituents are known as
A. Siliceous rocks
B. Argillaceous rocks
C. Calcareous rocks
D. Sedimentary rocks
Answer : B

24. The practical limit of moisture content achieved in air drying of timber is
A. 5 %
B. 15 %
C. 25 %
D. 35 %
Answer : B

25. Bituminous fells are used for
A. Covering A.C. sheets
B. Covering sloping roofs
C. D.P.C.
D. None to these
Answer : A

26. Pig iron is manufactured from the ores by
A. Dressing
B. Calcination and roasting
C. Smelting
D. All the above
Answer : D

27. Rapid hardening cement contains
A. Tri-calcium silicate
B. Tri-calcium aluminate
C. Tetra-calcium alumino-ferrite
D. Di-calcium silicate
Answer : A

28. Initial setting of cement is caused due to
A. Tri-calcium silicate
B. Di-calcium silicate
C. Tri-calcium aluminate
D. Tetra calcium alumino ferrite
Answer : C

29. A good brick earth should contain:
A. About 20% to 30% of alumina
B. About 50% to 60% of silica
C. Not more than 5% of lime
D. All the above
Answer : D

30. 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

31. 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

32. Seasoning of timber is essential to remove
A. Knots from timber
B. Sap from timber
C. Twisted fibre from timber
D. Roughness of timber
Answer : B

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

34. In stone masonry, stones (stratified rocks) are so placed that the direction of pressure to the plane of bedding is
A. Right angles
B. 45°
C. 60°
D. Parallel
Answer : A

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

36. Steel contains carbon approximately
A. 1.50% to 5.6%
B. 0.05% to 1.75%
C. 0.25 %
D. None to these
Answer : B

37. Veneering means
A. Carving out designs on timber planks
B. Chemically treating timber planks
C. Thick layer of superior wood glued to inferior wood
D. Thin layer of superior wood glued to inferior wood
Answer : C

38. 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

39. Plaster of Paris is obtained by calcining
A. Bauxite
B. Gypsum
C. Lime stone
D. None of these
Answer : B

40. Slacking of lime is affected by
A. Keeping it exposed to air
B. Immersing the lime in water
C. Crushing the lime lumps
D. None of these
Answer : B

41. 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

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

43. Pick up the correct statement from the following:
A. Acid test is done to find out the weathering quality of stones
B. Attrition test is done to find out the rate of wear of stones which are used in road construction
C. Crushing test is done to find out the compressive strength of the stone
D. All the above
Answer : D

44. Putty is
A. Made with finely powdered chalk and linseed oil
B. Used for fixing glass panes
C. Softened by a solution of pearl ash and quick-lime soaked in water
D. All the above
Answer : D

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

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

47. Plywood is made by bonding together thin layers of wood in such a way that the angle between grains of any layer to grains of adjacent layers is
A. 0°
B. 30°
C. 45°
D. 90°
Answer : D

48. 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

49. 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

50. For melting one tonne of cast iron
A. 700 m3 air is required
B. 20 kg limestone is required
C. One quintal coke is required
D. All the above
Answer : D