Civil Engineering - Building Materials MCQs Part 3

1. The commonly used drying oil for oil paints, is

A.
olive oil

B.
linseed oil

C.
kerosine oil

D.
accetate of lead.

 Answer Option D

2. 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 Option C

3. The foliated structure is very common in

A.
sedimentary rocks

B.
igneous rocks

C.
metamorphic rocks

D.
none of these.

 Answer Option C

4. Turpentine oil is used in paints as

A.
thinner

B.
vehicle

C.
base

D.
drier.

 Answer Option A

5. The hardest rock is

A.
marble

B.
diamond

C.
talc

D.
quartz.

 Answer Option B

6. The silica is used for preparing

A. silica bricks

B. coke oven

C. lining for glass furnaces

D. all of these.

 Answer Option D

7. Wrought iron is manufactured from pig iron by

A. refining

B. puddling

C. shingling

D. rolling

E. all the above.

 Answer Option E

8. Pick up the correct statement from the following:

A. The phenol is carbolic acid

B. The phenol is either extracted from coal-tar or prepared from benzene

C. Phenol reacts with formaldehyde, to form phenol formaldehyde resin

D. The plastics prepared from phenol-formaldehyde are used for paints, varnishes, w.c. seats

E. All the above.

 Answer Option E

9. Fibre boards can be

A. distempered

B. painted

C. painted and distempered

D. used for furniture.

 Answer Option D

10. 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 Option D

11. Portland pozzolana cement possesses

A. higher resistance to chemical attack

B. lower heat of hydration

C. lower shrinkage on drying

D. water tightness

E. all the above.

 Answer Option E

12. Iron ore may contain

A. carbon

B. silicon

C. sulphur

D. phosphorus and maganese

E. all the above.

 Answer Option E

13. Wrought iron is used for

A. structural works in beams

B. small sized water pipes

C. columns and struts

D. none to these.

 Answer Option B

14. The timber having maximum resistance against white ants, is obtained from

A. chir

B. shisham

C. sal

D. teak.

 Answer Option C

15. Knots in timber are

A. defects caused by crushing fibres

B. splits radiating from the centre

C. speckled strains

D. signs of branches cut off.

 Answer Option D

16. Pick up the correct statement from the following:

A. Solder material is an alloy which melts at a temperature above 400°C

B. Brazing is done at temperature above 600°C to 1100°C

C. Brazing joint is stronger than the solder joint

D. all the above.

 Answer Option D

17. Lime concrete is generally used for

A. wall foundations

B. flooring at ground level

C. both (a) and (b)

D. neither (a) nor (b).

 Answer Option B

18. Bituminous fells are used for

A. covering A.C. sheets

B. covering sloping roofs

C. D.P.C.

D. none to these.

 Answer Option A

19. The minimum compressive strength of Ilnd class bricks should be

A. 75 kg/cm2

B. 90 kg/cm2

C. 100 kg/cm2

D. 120 kg/cm2

E. 150 kg/cm2.

 Answer Option A

20. Stuco paints are suitable for

A. stone masonry

B. brick walls

C. both (a) and (b)

D. neither (a) nor (b).

 Answer Option C

21. Pick up the correct statement from the following:

A. Corrugated sheet iron is made by passing plain sheets between grooved rollers

B. Strength and stiffness of corrugated sheets are considerably increased

C. Corrugated sheets are generally gal-venised to protect iron from corrosion by rust

D. Corrugated sheets are generally used on slanting roofs

E. all the above.

 Answer Option E

22. Quick setting cement is produced by adding

A. less amount of gypsum in very fine powdered form

B. more amount of gypsum in very fine powdered form

C. aluminium sulphate in very fine powdered form

D. pozzolana in very fine powdered form

E. none of these.

 Answer Option C

23. Duco is one of the patent forms of

A. emulsion paints

B. plastic paints

C. bituminous paints

D. aluminium paints

E. cellulose paints.

 Answer Option E

24. Pick up the correct statement from the following:

A. The substance which consists of one primary chemical, is known as monomer

B. The polymer consists of thousands of monomers joined together

C. The polymer molecule is called macro-molecule

D. A polymetric material consists of a large number of long-chain molecules

E. All the above.

 Answer Option E

25. Bulking of sand is caused due to

A. surface moisture

B. air voids

C. viscosity

D. clay contents

E. all the above.

 Answer Option A

26. The normal curing period for lime mortar, is:

A. one day

B. 3 days

C. 7 days

D. 10 days

E. 14 days.

 Answer Option C

27. The type of steel used for precision levelling staff, is

A. Titanium steel

B. Carbon steel

C. Invar

D. Stainless steel.

 Answer Option C

28. During pudding

A. molten metal is kept clear of the fuel

B. carbon is converted into carbonic acid gas

C. silicon forms a slag

D. metal is heated by the burning of gases

E. all the above.

 Answer Option E

29. German silver is an alloy of

A. zinc, lead and nickel

B. silver, gold and lead

C. copper, nickel and zinc

D. copper, brass and zinc

E. brass, silver and zinc.

 Answer Option C

30. Pick up the incorrect statement from the following:

A. Plastics are chemical resistant

B. Plastics are durable

C. Plastics are ductile

D. Plastics are excellent electric insulators.

 Answer Option C

31. Pick up correct statement from the following:

A. Fibre boards are used for thermal and acoustic control

B. Fibre boards are used for light weight standing members

C. Fibre boards are obtained by impregnating a resin product on fibres

D. all the above.

 Answer Option D

32. Quartzite, a metamorphic stone is

A. hard

B. brittle

C. crystalline

D. compact

E. All the above.

 Answer Option E

33. Pick up the correct statement from the following:

A. Plastics have generally low melting point

B. The coefficient of thermal expansion of plastics is about three times than that of steel

C. The acoustical boards prepared by impregnating fibre-glass with phenolic resins has absorption coefficient of about 0.67

D. All the above.

 Answer Option D

34. Dextrin is

A. animal glue

B. starch glue

C. albumin glue

D. rubber based adhesive

E. none to these.

 Answer Option D

35. Formula for quick lime, is

A. CaCO3

B. CaO

C. CO3CO2

D. none to these.

 Answer Option B

36. For the manufacture of stainless steel, steel is mixed with

A. chromium

B. nickel

C. tungsten

D. none of these.

 Answer Option A

37. Stones used for ornamental work must be

A. soft

B. hard

C. light

D. heavy.

 Answer Option A

38. Pick up the correct statement from the following:

A. Quick lime is obtained by burning pure lime stone:

B. Hydraulic lime is obtained by burning lime stone containing clay 5% to 30%

C. Poor lime is obtained by burning lime stone containing impurities more than 5%

D. All the above.

 Answer Option D

39. The presence of original rounded surface on the manufactured piece of timber, is called

A. Wane

B. Torn grain

C. Diagonal grain

D. Chipmark.

 Answer Option A

40. 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 Option A

41. The cracks caused by shrinkage of the exterior surface of the wood exposed to atmosphere, are called:

A. radial shakes

B. heart shakes

C. wind cracks

D. twisted fibres.

 Answer Option C

42. The process of decarbonising the pig iron completely and then adding proper percentage of carbon for manufacturing steel, is called

A. Cementation process

B. crucible process

C. Bessemer process

D. Open hearth process.

 Answer Option A

43. In paints, the pigment is responsible for

A. durability

B. colour

C. smoothness

D. glassy face

E. none of these.

 Answer Option B

44. The operation of removal of impurities or clay adhering to iron ores, is known as

A. dressing

B. calcination

C. roasting

D. smelting.

 Answer Option A

45. If water required for 1 bag of cement is 30 litres, the water cement ratio is :

A. 0.40

B. 0.50

C. 0.60

D. None of these.

 Answer Option C

46. Portland cement manufactured from pure white chalk and clay but free from iron-oxide, is known as

A. quick setting cement

B. rapid hardening cement

C. white cement

D. low heat Portland cement.

 Answer Option C

47. Dry rot

A. cracks the timber

B. reduces the strength of timber

C. reduces the timber to powder

D. shrinks the timber

E. spoils the appearance of timber.

 Answer Option C

48. Which one of the following polymers is obtained from condensation polymerization?

A. phenol formaldehyde

B. carbamide

C. melamine-formaldehyde

D. all of these.

 Answer Option D

49. The weight of 1 m3 of brick earth, is about

A. 1200 kg

B. 1500 kg

C. 1800 kg

D. 2000 kg.

 Answer Option C

50. 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 Option A