Building Materials MCQs Set-11

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1. The melting point of silica is:

1630°C

1570°C

1850°C

1730°C

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

Toughed cast iron

White cast iron

Mottled cast iron

Grey cast iron

3. Kaolin is chemically classified as

Siliceous rock

Metamorphic rock

Calcareous rock

Argillaceous rock

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

White lead

Red lead

Titanium white

Zinc white

5. Pick up the polymineralic rock from the following:

Pure gypsum

Magnesite

Quartz sand

Granite

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

Nickel steel

Vanadium steel

Manganese steel

Chrome steel

7. Lime stones are generally known as

Stratified rocks

All of these

Sedimentary rocks

Aqueous rocks

8. Knots in timber are

Defects caused by crushing fibres

Splits radiating from the centre

Signs of branches cut off

Speckled strains

9. Bitumen felt is used for

(B) Damp proofing

(A) Water proofing

(D) Neither (A) nor (B)

(C) Both (A) and (B)

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

Fat lime

White lime

Rich lime

None of these

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11. A well seasoned timber may contain moisture up to

6 to 8 %

4 to 6 %

10 to 12 %

8 to 10 %

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

Siliceous rock

Calcareous rock

Argillaceous rock

None of these

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

Hydraulic lime

Fat lime

Poor lime

Quick lime

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

Cast steel

Whitworth compressed steel

Bessemer steel

Mild steel

15. Pick up the hypabyssal rock from the following:

Granite

Dolerite

Basalt

All of these

16. Acrylic is the name of

Cumarone-indene

Methyl methacrylate

Alkyd resin

Cellulose resin

17. Stones used for rubble masonry must be

Hard

Soft

Heavy

Light

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

Calcining

Slacking

Setting

Hydraulicity

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

10, 75, 15

10, 15, 75

15, 75, 10

75, 10, 15

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

120 kg/cm^2

75 kg/cm^2

100 kg/cm^2

90 kg/cm^2

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21. Plastic asphalt is

A mixture of cement and asphalt

A natural asphalt

Used as a water proofing layer over roof

A refinery product

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

Magnetite

Limonite

Iron pyrites

Siderite

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

All of these

Rot proof

Rust proof

Water proof

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

Radial shakes

Heart shakes

Star shakes

Cup shakes

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

Quick setting cement

Low heat Portland cement

Rapid hardening cement

White cement

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

None of these

Dolomite, Magnesia, Bauxite, Chromites

Magnesia, Bauxite, Dolomite, Chromites

Bauxite, Chromites, Dolomite, Magnesia

27. 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

Crucible process

Cementation process

Open hearth process

Bessemer process

28. Porcelain is used as:

Storage vessels

Reactor chambers

Sanitary wares

Electric insulators

29. Wrought iron contains carbon upto

1.5 %

0.25 %

1.0 %

2.0 %

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

60%, 40%

70%, 30%

50%, 50%

80%, 20%

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31.

Refractory clay

All of these

Stone ware

Earthen ware

32. Acrylic sheets

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

All the above

Are generally unaffected by most household detergents

Possess the light transmission rate of 93%

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

Bessemer pig

White forge pig

Mottled pig

Grey or foundry pig

34. Second class bricks

Are of dark brown color

Are under burnt

Are well burnt

Produce a metallic sound when struck

35. The standard size of masonry bricks, is

21 cm × 11 cm × 11 cm

20 cm × 10 cm × 10 cm

18 cm × 8 cm × 8 cm

19 cm × 9 cm × 9 cm

36. The rock generally used for roofing, is

Pumice

Slate

Basalt

Granite

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

All of these

Thinner

Vehicle

Pigment

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

Mild steel

Stainless steel

Wrought iron

High carbon steel

39. The specific gravity of marble, is

2.72

2.66

2.60

2.50

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

Sand stone

Gypsum

Gravel

Dolerite

Building Materials MCQs Set-11

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