Building Materials MCQs Set-11

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1. Stones used for rubble masonry must be

Soft

Light

Hard

Heavy

2. The lime which contains high percentage of calcium oxide, is generally called

White lime

Rich lime

None of these

Fat lime

3. In a rock calcium carbonate predominates. State whether it is :

Siliceous rock

Calcareous rock

Argillaceous rock

None of these

4. Wrought iron contains carbon upto

2.0 %

1.5 %

0.25 %

1.0 %

5. Lime stones are generally known as

Stratified rocks

Sedimentary rocks

Aqueous rocks

All of these

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

Chrome steel

Vanadium steel

Nickel steel

Manganese steel

7. The variety of pig iron used for manufacture of wrought iron, is

Bessemer pig

White forge pig

Grey or foundry pig

Mottled pig

8. Upto a maximum of 72% of iron, is available in

Magnetite

Siderite

Iron pyrites

Limonite

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

Thinner

Pigment

Vehicle

All of these

10. The lime which contains mainly calcium oxide and slacks with water, is

Poor lime

Quick lime

Fat lime

Hydraulic lime

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

50%, 50%

60%, 40%

70%, 30%

80%, 20%

12. Bitumen felt is used for

(A) Water proofing

(B) Damp proofing

(C) Both (A) and (B)

(D) Neither (A) nor (B)

13. A well seasoned timber may contain moisture up to

8 to 10 %

4 to 6 %

10 to 12 %

6 to 8 %

14. The minimum compressive strength of 1st class bricks should be

75 kg/cm^2

100 kg/cm^2

120 kg/cm^2

90 kg/cm^2

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

Bessemer steel

Cast steel

Mild steel

Whitworth compressed steel

16. Knots in timber are

Speckled strains

Signs of branches cut off

Defects caused by crushing fibres

Splits radiating from the centre

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

Calcining

Hydraulicity

Setting

Slacking

18. Porcelain is used as:

Electric insulators

Sanitary wares

Storage vessels

Reactor chambers

19. The PVC doors and windows are preferred as they are

Water proof

Rust proof

Rot proof

All of these

20. Acrylic sheets

Possess 10 to 17 times greater breakage resistance than that of glass of equivalent thickness

Are generally unaffected by most household detergents

Possess the light transmission rate of 93%

All the above

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21. The specific gravity of marble, is

2.50

2.60

2.72

2.66

22.

All of these

Stone ware

Earthen ware

Refractory clay

23. The cast iron when heated to red heat with powdered red haematite in an oven for increasing its toughness, is converted to

Mottled cast iron

Toughed cast iron

White cast iron

Grey cast iron

24. The rock generally used for roofing, is

Slate

Basalt

Pumice

Granite

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

White cement

Low heat Portland cement

Rapid hardening cement

Quick setting cement

26. Acrylic is the name of

Alkyd resin

Methyl methacrylate

Cumarone-indene

Cellulose resin

27. Kaolin is chemically classified as

Calcareous rock

Siliceous rock

Argillaceous rock

Metamorphic rock

28. The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively:

10, 15, 75

75, 10, 15

15, 75, 10

10, 75, 15

29. Plastic asphalt is

A mixture of cement and asphalt

Used as a water proofing layer over roof

A natural asphalt

A refinery product

30. The commonly used base for iron and steel work, is

Zinc white

White lead

Titanium white

Red lead

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31. Pick up the hypabyssal rock from the following:

Granite

Dolerite

Basalt

All of these

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

Heart shakes

Radial shakes

Cup shakes

Star shakes

33. The sequence of refractory materials according to increasing melting points is:

Magnesia, Bauxite, Dolomite, Chromites

None of these

Bauxite, Chromites, Dolomite, Magnesia

Dolomite, Magnesia, Bauxite, Chromites

34. The process of manufacturing steel by heating short lengths of wrought iron bars mixed with charcoal in fire clay crucibles and collecting the molten iron into moulds, is known as

Bessemer process

Cementation process

Open hearth process

Crucible process

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

Dolerite

Gravel

Gypsum

Sand stone

36. Second class bricks

Are under burnt

Produce a metallic sound when struck

Are well burnt

Are of dark brown color

37. The steel used in R.C.C. work is

Stainless steel

Mild steel

High carbon steel

Wrought iron

38. The standard size of masonry bricks, is

18 cm × 8 cm × 8 cm

20 cm × 10 cm × 10 cm

21 cm × 11 cm × 11 cm

19 cm × 9 cm × 9 cm

39. Pick up the polymineralic rock from the following:

Quartz sand

Magnesite

Granite

Pure gypsum

40. The melting point of silica is:

1630°C

1730°C

1570°C

1850°C

Building Materials MCQs Set-11

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