Construction Materials Online Test - Paper 3

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Vikash chaudhary

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Total Questions: 50
Time Allotted: 50 minutes
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1 / 50

1. The group of tools used for quarrying of stone is

a) jumper and crowbar

b) crowbar and trowel

c) trowel and wedge

d) wedge and scutch

2 / 50

2. Pumice is a type of

a) igneous rock

b) sedimentary rock

c) metamorphic rock

d) none of the above

3 / 50

3. *A good quality stone must absorb water less than

a) 2.50%

b) 5%

c) 10%

d) 20%

4 / 50

4. Which of the following is the reason for the decrease in the use of stones as building material?

a) steel and R.C.C. are less bulky and more durable

b) strength of stones cannot be rationally analyzed

c) stones are not conveniently available in plains

d) all of the above

5 / 50

5. The chemical action between cement and water is technically known as:

a) dehydration

b) carbonation

c) calcination

d) hydration

6 / 50

6. For one cubic meter of brick masonry, the number of machine-made brick required as per NS is

a) 430

b) 530

c) 560

d) 660

7 / 50

7. Knots in timber are

a) speckled strains

b) signs of branches cut off

c) defects caused by crushing fibers

d) splits radiating from the center

8 / 50

8. Which one is correct?

a) normally concreting is done above 20┬░C

b) the optimum temperature for concreting is 27┬░┬▒2┬░

c) consistency test is done at a temperature of 25┬░C to 29┬░C

d) all of the above

9 / 50

9. *The defects in wood due to hardening is

a) knots

b) rind galls

c) burls

d) none of the above

10 / 50

10. Excessive free lime and excessive magnesia present in the cement make the cement

a) unsound

b) have very low initial setting time

c) have very light compressive strength

d) gain strength faster

11 / 50

11. Refractory bricks are

a) neutral refractory brick

b) acid refractory brick

c) basic refractory brick

d) all of the above

12 / 50

12. *Galvanizing means

a) depositing a fine film of zinc on iron or steel by dipping in molten zinc

b) depositing a fine film of tin on iron or steel by dipping in molten tin

c) depositing a fine film of lead on iron or steel by dipping in molten iron

d) none of the above

13 / 50

13. *The timber whose thickness is less than 5 cm and width exceeds 12 cm is called a

a) board

b) plank

c) batten

d) log

14 / 50

14. Which one is correct?

a) PPC gains strength slowly as compared to OPC

b) ultimate strength of PPC is higher than OPC

c) PPC has higher resistance of chemical attack

d) all of the above

15 / 50

15. 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.

16 / 50

16. *Quick lime is

a) calcium oxide

b) calcium hydroxide

c) calcium carbonate

d) none of the above

17 / 50

17. Common sand is a variety of

a) calcite

b) quartz

c) felspar

d) chlorite

18 / 50

18. As compared to fat lime, the hydraulic lime sets

a) faster

b) slower

c) same rate

d) very slowly

19 / 50

19. The layer between the bark of the tree and the sapwood, which is not yet converted into wood is called

a) heartwood

b) cambium layer

c) softwood layer

d) pith

20 / 50

20. Based on its dry weight, a freshly felled tree may contain water

a) 25%

b) 50%

c) 75%

d) 100%

21 / 50

21. Freshness of cement is decided on the basis of

a) It should be free from lumps of set cement.

b) When cement is rubbed between fingers and thumb, it should feel like a smooth powder.

c) It feels cool after inserting a hand in the bag of cement.

d) all of the above

22 / 50

22. The advantage of adding pozzolana to lime is

a) increased strength to cracking

b) reduced shrinkage

c) increased resistance to chemical attack

d) impart greater strength

23 / 50

23. *In paints, the pigment is responsible for:

a) durability

b) smoothness

c) color

d) gray face

24 / 50

24. Quarry sap is found in

a) fresh wood

b) fresh stone

c) fresh brick

d) fresh lime

25 / 50

25. A pug mill is used for

a) softening brick earth

b) moulding brick earth

c) tempering brick earth

d) all of the above

26 / 50

26. *Specific gravity for most of the ordinary building stone lines between

a) 1.5 to 2.0

b) 2.0 to 2.5

c) 2.4 to 3.0

d) 3.0 to 3.5

27 / 50

27. *Which constituent of the cement, upon the addition of water, sets and hardens first

a) tri-calcium silicate

b) tri-calcium aluminate

c) di-calcium silicate

d) free lime

28 / 50

28. Fracture of asbestos is

a) regular

b) irregular

c) fibrous

d) concoidal

29 / 50

29. *Plastic bitumen is generally used for

a) road pavements

b) painting

c) expansion joints

d) crack filling

30 / 50

30. Kaolin (china clay) is a

a) calcareous rocks

b) argillaceous rocks

c) siliceous rocks

d) sandy rocks

31 / 50

31. Slate is a metamorphic rock obtained from the structural change of

a) shale

b) granite

c) sandstone

d) marble

32 / 50

32. *The painting work is generally specified by

a) weight of the paint applied

b) labor used in the painting

c) area of the painted surface

d) all of the above

33 / 50

33. Which of the following is a rock?

a) gypsum

b) augite

c) calcite

d) mica

34 / 50

34. The standard size of a brick as per Nepal Standard (NBC205:2013) is

a) 20x 10x10 cm^3

b) 230x115x57 mm^3

c) 18x9x9 cm^3

d) 18x8x8 cm^3

35 / 50

35. Refractory bricks are specially manufactured

a) to withstand high crushing pressure

b) to withstand high temperature

c) to have high insulation against sound

d) none of the above

36 / 50

36. *Soundness test of cement determines

a) quantity of free lime

b) ultimate strength

c) durability

d) initial setting

37 / 50

37. Lime suitable for making mortar of good strength

a) hydraulic lime

b) fat lime

c) lean lime

d) none of the above

38 / 50

38. A stone is rejected if the water absorption is more than

a) 10%

b) 20%

c) 25%

d) 30%

39 / 50

39. *The main constituent of cement in descending order is

a) lime, silica, alumina, iron oxide, and magnesia

b) silica, alumina, iron oxide, magnesia, and lime

c) silica, alumina, iron oxide, and magnesia

d) alumina, lime, iron oxide, magnesia, and silica

40 / 50

40. *The weight loss on heating of bitumen used for pavement should not be more than

a) 1%

b) 3%

c) 4%

d) 5%

41 / 50

41. *Normally the bricks (1st class) obtained from pazawah is about

a) 30%

b) 40%

c) 50%

d) 60%

42 / 50

42. *To give a brilliant finish, the type of varnish used is:

a) water varnish

b) spirit varnish

c) turpentine varnish

d) oil varnish

43 / 50

43. *The lime suitable for making mortar is

a) quick lime

b) fat lime

c) hydraulic lime

d) pure lime

44 / 50

44. *The size of bull's trench kiln is

a) circular

b) parabolic

c) elliptical

d) all of the above

45 / 50

45. The most commonly used retarder in cement is:

a) gypsum

b) calcium chloride

c) calcium carbonate

d) none of the above

46 / 50

46. The dry process of manufacturing cement has become obsolete because, in comparison to the wet process

a) it is slow and costly

b) the quality of cement produced by it is inferior

c) it is difficult to maintain the correct proportions of constituents

d) all of the above

47 / 50

47. The ordinary cement used in general construction is:

a) rapid hardening cement

b) Portland cement

c) high alumina cement

d) pozzolanic cement

48 / 50

48. *Granites are a type of

a) silicious rock

b) argillaceous rock

c) calcareous rock

d) none of the above

49 / 50

49. *The most commonly used accelerator for concreting is

a) gypsum

b) calcium chloride

c) calcium oxide

d) calcium sulphate

50 / 50

50. *The pigment in paints gives

a) smoothness

b) durability

c) glossy face

d) color

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Construction Materials Online Test – Paper 3

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