Civil Engineering - Building Materials MCQs Part 5

1. The pigment used in paints for corrosive resistance, is

A.
white lead

B.
ferrous oxide

C.
zinc white

D.
red lead

E.
gypsum.

 Answer Option D

2. A well seasoned timber may contain moisture up to

A.
4 to 6%

B.
6 to 8%

C.
8 to 10%

D.
10 to 12%.

 Answer Option D

3. The stones obtained by blasting are used as

A.
ballast in railways

B.
aggregates for concrete

C.
roadmetal

D.
All the above.

 Answer Option D

4. Distemper is

A.
a paint consisting of powdered chalk, pigments, and water

B.
a water proofing agent

C.
a paint consisting of coloured cement and water

D.
a drying agent.

 Answer Option A

5. 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 Option C

6. 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 Option D

7. The cracks which extend from bark towards the sap wood in the cross section of a tree, are called

A. radial shakes

B. star shakes

C. heart shakes

D. cup shakes.

 Answer Option B

8. Sea sand used in structures causes

A. dampness

B. efflorescence

C. disintegration

D. All of these.

 Answer Option D

9. The compound of Portland cement which reacts immediately with water and also sets first is

A. Tri-calcium silicate

B. Di-calcium silicate

C. Tri-calcium aluminate

D. Tetra calcium alumino ferrite.

 Answer Option C

10. Refractory bricks resist

A. high temperature

B. chemical action

C. dampness

D. all the above.

 Answer Option A

11. When a brick is immersed in water for 24 hours and then dried, if

A. no grey or white deposits appear on the surface, the brick is free from soluble salts

B. 10 per cent surface is covered with grey or white deposits, the brick has slight efflorescence

C. 50 per cent surface is covered with grey or white deposits, the brick has serious efflorescence

D. All the above.

 Answer Option D

12. In arches, stratified stones are placed so that their planes are

A. parallel

B. perpendicular

C. radial

D. none of these.

 Answer Option C

13. 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. Impact test is done to determine toughness of a stone

E. All the above.

 Answer Option E

14. The fire clay contains pure

A. lime

B. oxide of iron

C. hydrated aluminium silicate

D. magnesium.

 Answer Option C

15. Pick up the correct characteristic of Pyroxene from the following:

A. It forms octagonal crystals

B. It converts to chlorine by hydration

C. Its density is 2.3 to 3.6 g/cm2

D. Its hardness is 5 to 6

E. All the above.

 Answer Option E

16. For sanitary pipes and chemical stonewares,

A. salt glazing is used

B. lead glazing is used

C. opaque glazing is used

D. None of these.

 Answer Option A

17. The steel used for rails under heavy traffic and on sharp curves, is

A. Nickel steel

B. Chrome steel

C. Magnese steel

D. Vanadium steel.

 Answer Option C

18. The weight of a good quality brick when immersed in water for a period of 16 hours should not exceed the weight of dry brick

A. 20%

B. 15%

C. 10%

D. None of these.

 Answer Option A

19. Snowcrete is one of the patent forms of

A. distempers

B. water proof cement paints

C. enamel paints

D. cellulose paints.

 Answer Option B

20. The usual percentages of clay and metal in cermet are :

A. 50%, 50%

B. 60%, 40%

C. 70%, 30%

D. 80%, 20%.

 Answer Option D

21. Pick up the correct statement from the following:

A. Horn blende mineral is brittle

B. Muscovite is also known as white mica and potashmica

C. Biotite is also known as blackmica

D. All the above.

 Answer Option D

22. 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. Ignoeous rocks.

 Answer Option B

23. The base material for distemper, is

A. chalk

B. lime

C. lime putty

D. cement wash.

 Answer Option A

24. The thermosetting plastic

A. becomes rigid when moulded at suitable pressure and temperature

B. at 127°C to 177°C permanently set and further application of heat does not soften it

C. charrs at 343°C

D. All the above.

 Answer Option D

25. Pick up the synthetic resin from the following:

A. Malamine resin

B. Phenolic resin

C. Resorcinol resin

D. Urea resin

E. All of these.

 Answer Option E

26. 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 Option B

27. The steel used in R.C.C. work is

A. stainless steel

B. mild steel

C. high carbon steel

D. wrought iron.

 Answer Option B

28. Mastic asphalt is

A. water proof

B. fire proof

C. elastic

D. all the above.

 Answer Option D

29. Non acid-resistant asbestos is :

A. tremolite asbestos

B. chrysolite abestos

C. amosite absestos

D. none of these.

 Answer Option B

30. Stones used for the construction of retaining walls must be

A. soft

B. hard

C. light

D. heavy.

 Answer Option D

31. 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 Option D

32. Plastics are compounds of carbon with element

A. hydrogen

B. nitrogen

C. oxygen

D. All of these.

 Answer Option D

33. Pick up the correct statement from the following:

A. The plastic bottles are made by the process of blowing

B. The plastic sheets are made by the calendering process in which the plastic material is allowed to pass between cylindrical rollers

C. The application of thermo-setting resins on sheets of paper, is called laminating process

D. The plastic articles made by placing raw material in the desired moulds, is known as moulding process

E. All the above.

 Answer Option E

34. Pick up the constituent of good brick earth whose excess causes the raw bricks shrink and warp during drying and burning, from the following:

A. Alumina

B. Lime

C. Ironoxide

D. Magnesia.

 Answer Option A

35. Cast iron is used for

A. structural works in beams

B. small sized water pipes

C. columns and struts

D. none to these.

 Answer Option C

36. Stainless steel resists corrosion due to

A. carbon

B. sulphur

C. vanadium

D. chromium

E. maganese.

 Answer Option D

37. Commonly used thinner in

A. lacquer paints, is alcohol

B. cellulose paints is ethyle acetate

C. oil paints, is naptha

D. distemper, is water

E. all the above.

 Answer Option E

38. Good quality sand is never obtained from

A. river

B. nala

C. sea

D. gravel powder.

 Answer Option C

39. Pick up the rock which is not a sedimentary rock from the following:

A. gravel

B. sand stone

C. gypsum

D. dolerite

E. lignite.

 Answer Option D

40. 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 Option D

41. Blister steel

A. is obtained by cementation process

B. is full of fissures and cavities

C. can not be forged

D. can be easily welded

E. all the above.

 Answer Option E

42. The most important constituent of varnish, is

A. drier

B. solvent

C. resin

D. all the above.

 Answer Option D

43. A ferrous metal is

A. cast iron

B. wrought iron

C. steel

D. all the above.

 Answer Option D

44. For making fly-ash building bricks, the following mix of fly-ash, sand and lime, is

A. 80 : 13 : 7

B. 70 : 20 : 10

C. 60 : 35 : 5

D. none of these.

 Answer Option A

45. Pick up the correct statement from the following:

A. Lime is available in free state

B. Lime is available by dissolving calcium carbonate in water

C. Lime is available by calcining calcium carbonate at 900°C

D. Lime is nothing but calcium chloride

E. None of these.

 Answer Option C

46. Water paint is a

A. white wash

B. colour wash

C. whiting

D. distemper

E. all the above.

 Answer Option E

47. Seasoning of timber is done

A. to make it water proof

B. to paint its surface

C. to increase its temperature

D. to remove water.

 Answer Option D

48. The specific gravity of marble, is

A. 2.50

B. 2.60

C. 2.66

D. 2.72

E. 3.00.

 Answer Option D

49. 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

E. igneous rocks.

 Answer Option B

50. The curved swellings from the growth of layers or wounds left after branches are cut off in an irregular manner, are known as

A. knots

B. rindgalls

C. burls

D. none of these.

 Answer Option B