Civil Engineering - Building Materials MCQs Part 7

1. A bull nose brick is not used for

A.
rounding off sharp corners

B.
pillars

C.
decoration purpose

D.
arches.

 Answer Option D

2. Red short iron cracks when bent due to the presence of

A.
sulphur

B.
carbon

C.
phosphorus

D.
silicon.

 Answer Option A

3. Linseed oil is used in paints as

A.
thinner

B.
vehicle

C.
base

D.
drier.

 Answer Option D

4. Plaster of Paris is obtained by calcining

A.
bauxite

B.
gypsum

C.
kankar

D.
lime stone

E.
none of these.

 Answer Option B

5. For high grade instruments the steel preferred to, is

A.
cast steel

B.
bessemer steel

C.
mild steel

D.
whitworth compressed steel.

 Answer Option A

6. If the ore impurities is

A. clay, lime stone is used as flux

B. lime stone, clay is used as flux

C. quartz, lime stone and argallaceous iron ores are used as flux

D. All the above.

 Answer Option D

7. The plastics prepared from Vinyl resin are

A. odourless

B. non-toxic

C. transparent

D. colourless

E. all of these.

 Answer Option E

8. Chlorite, a green colour mineral is mainly derived from the decomposition of

A. augite

B. biotite

C. horn blende

D. All of these.

 Answer Option A

9. During smelting process, the combination of fuel in the furnace

A. forms carbon dioxide

B. carbon dioxide with carbon forms carbon mono-oxide

C. carbon mono-oxide reacts with Fe2O3 to form iron and liberates CO2

D. all the above.

 Answer Option D

10. Lime stones are generally known as

A. aqueous rocks

B. sedimentary rocks

C. stratified rocks

D. all the above.

 Answer Option D

11. The method of addition polymerization is used for obtaining:

A. polythylene

B. polypropylene

C. polyvinylchloride

D. polystyrene

E. All of these.

 Answer Option E

12. 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. The addition of gypsum increases the initial setting time of cement

E. All the above.

 Answer Option E

13. A rock contains only one mineral. It is called

A. homogeneous

B. non-homogeneous

C. monomineralic

D. polymineralic.

 Answer Option C

14. Asbestos

A. is a natural fibrous mineral substance

B. is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3)

C. contains iron oxide and alumina

D. all the above.

 Answer Option D

15. Pegmatite is a/an

A. intrusive igneous rock

B. extrusive igneous rock

C. sedimentary rock

D. metamorphic rock.

 Answer Option A

16. The percentage of alumina and silica in good fire clay vary respectively is

A. 25, 75

B. 30, 70

C. 35, 65

D. All of these.

 Answer Option A

17. 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 Option B

18. Asphalt is obtained from

A. petroleum distillation

B. bitumen distillation

C. plastic distillation

D. none of these.

 Answer Option A

19. To retard the initial setting time of cement, the compound responsible, is

A. Tricalcium silicate

B. Gypsum

C. Di-calcium silicate

D. Tri calcium aluminate.

 Answer Option B

20. Dorry's testing machine is used for

A. crushing test of stone

B. hardness test of stone

C. impact test of stone

D. water absorption test.

 Answer Option B

21. Stones used for rubble masonry must be

A. soft

B. hard

C. light

D. heavy.

 Answer Option B

22. 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 Option B

23. Dolomite is a lime stone which contains carbonate of magnesia upto

A. 15%

B. 20%

C. 25%

D. 35%

E. 45%.

 Answer Option E

24. Priming consists of

A. one part of white lead, 8 parts of chalk and four parts of twice boiled linseed oil

B. 8 parts of white lead, one part of chalk and four parts of twice boiled linseed oil

C. one part of white lead, 8 parts of chalk and one part of linseed oil

D. none to these.

 Answer Option A

25. 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

E. none of these.

 Answer Option B

26. Seasoning of timber is done for

A. increasing moisture content

B. decreasing moisture content

C. increasing strength of timber

D. none to these.

 Answer Option B

27. Bitumen felt is used for

A. water proofing

B. damp proofing

C. both (a) and (b)

D. neither (a) nor (b).

 Answer Option C

28. According to ISI, bitumen is classified into

A. 2 grades

B. 4 grades

C. 6 grades

D. 8 grades.

E. 10 grades.

 Answer Option E

29. Lime putty

A. is made from hydraulic lime

B. is made by adding lime to water

C. can be used only upto three days

D. may be obtained from drying lime water mix passing through IS sieve No. 300

E. all of above.

 Answer Option E

30. The minimum percentage of silica, alumina and ferric oxide in lime for white washing, is

A. 20

B. 15

C. 10

D. 5

E. 0.

 Answer Option E

31. 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

E. 25 litres.

 Answer Option D

32. The presence of sand in brick earth prevents:

A. cracking of bricks

B. shrinkage of bricks

C. warping of bricks

D. none of these.

 Answer Option C

33. The property by virtue of which lime sets under water, is known as

A. slacking

B. setting

C. hydraulicity

D. calcining.

 Answer Option C

34. 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 Option D

35. The coefficient of hardness of stones used in road work should be greater than

A. 10

B. 12

C. 15

D. 17.

 Answer Option D

36. Pick up the correct statement from the following:

A. Air bubbles in casting produce a dull sound by tapping their surfaces lightly with a hammer

B. Cupola furnace is used for the manufacture of cast iron

C. Red short iron is of no value for welding purpose

D. All the above.

 Answer Option D

37. The steel used for the manufacture of rails, is

A. Bessemer steel

B. mild steel

C. cast steel

D. stainless steel.

 Answer Option A

38. Slump test for concrete is carried out, to determine

A. strength

B. durability

C. workability

D. water content.

 Answer Option C

39. Basalt is

A. sedimentary rock

B. metamorphic rock

C. extrusive igneous rock

D. intrusive igneous rock.

 Answer Option C

40. The frog of a brick is normally made on its

A. top face

B. bottom face

C. longer face

D. shorter side.

 Answer Option A

41. The most important constituent of an oil paint, is

A. thinner

B. vehicle

C. pigment

D. base

E. all the above.

 Answer Option E

42. Granite mainly composed of quartz and felsper particles, is obtained from

A. sedimentary rocks

B. metamorphic rocks

C. igneous rocks

D. all the above.

 Answer Option C

43. Bullet proof glass is made of thick glass sheet sandwiched by a layer of

A. steel

B. stainless steel

C. high test plastic

D. chromium plate.

 Answer Option C

44. Pig iron obtained from the furnance which is properly provided with fuel at a very high temperature, is called

A. Bessemer pig

B. Grey or foundry pig

C. White or forge pig

D. Mottled pig

E. None of the above.

 Answer Option B

45. Refractory bricks are

A. neutral refractory bricks

B. acid refractory bricks

C. basic refractory bricks

D. all the above.

 Answer Option D

46. Porcelain is used as :

A. sanitary wares

B. electric insulators

C. storage vessels

D. reactor chambers

E. All of the above.

 Answer Option E

47. Durability of building stone is affected by its

A. chemical composition

B. texture

C. resistance to atmosphere

D. location in structure

E. all the above.

 Answer Option E

48. Magnese steels

A. are non-magnetic

B. possess high electrical resistance

C. possess low coefficient of expansion

D. are used for the manufacture of rails

E. all the above.

 Answer Option E

49. Pick up the metal refractory from the following:

A. Molyblendum

B. Tungsten

C. Zicronium

D. All of these.

 Answer Option D

50. According to IS 399-1963, the weight of the timber is specified at

A. 8% moisture content

B. 10% moisture content

C. 12% moisture content

D. 14% moisture content.

 Answer Option C