Building Materials MCQs Set-11

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1. Wrought iron contains carbon upto

1.0 %

2.0 %

0.25 %

1.5 %

2. The standard size of masonry bricks, is

20 cm × 10 cm × 10 cm

18 cm × 8 cm × 8 cm

21 cm × 11 cm × 11 cm

19 cm × 9 cm × 9 cm

3. Pick up the hypabyssal rock from the following:

Dolerite

Granite

All of these

Basalt

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

Vanadium steel

Chrome steel

Manganese steel

Nickel steel

5. The melting point of silica is:

1570°C

1730°C

1850°C

1630°C

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

Quick setting cement

White cement

Rapid hardening cement

Low heat Portland cement

7. Porcelain is used as:

Sanitary wares

Electric insulators

Reactor chambers

Storage vessels

8. Plastic asphalt is

A natural asphalt

A mixture of cement and asphalt

Used as a water proofing layer over roof

A refinery product

9.

All of these

Stone ware

Refractory clay

Earthen ware

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

75, 10, 15

10, 75, 15

10, 15, 75

15, 75, 10

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

Rich lime

None of these

Fat lime

White lime

12. 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

Mottled cast iron

White cast iron

Grey cast iron

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

Slacking

Hydraulicity

Setting

Calcining

14. 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%

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

Cast steel

Whitworth compressed steel

Mild steel

Bessemer steel

16. A well seasoned timber may contain moisture up to

10 to 12 %

6 to 8 %

4 to 6 %

8 to 10 %

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

High carbon steel

Wrought iron

Mild steel

Stainless steel

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

Poor lime

Hydraulic lime

Fat lime

Quick lime

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

Gravel

Dolerite

Gypsum

Sand stone

20. The specific gravity of marble, is

2.66

2.50

2.72

2.60

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

Star shakes

Radial shakes

Heart shakes

Cup shakes

22. Lime stones are generally known as

Aqueous rocks

All of these

Stratified rocks

Sedimentary rocks

23. Pick up the polymineralic rock from the following:

Pure gypsum

Magnesite

Quartz sand

Granite

24. Bitumen felt is used for

(A) Water proofing

(D) Neither (A) nor (B)

(B) Damp proofing

(C) Both (A) and (B)

25. Second class bricks

Produce a metallic sound when struck

Are of dark brown color

Are under burnt

Are well burnt

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

Grey or foundry pig

White forge pig

Bessemer pig

Mottled pig

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

Calcareous rock

None of these

Siliceous rock

Argillaceous rock

28. Stones used for rubble masonry must be

Heavy

Soft

Light

Hard

29. 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

Open hearth process

Crucible process

Cementation process

Bessemer process

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

Magnetite

Limonite

Iron pyrites

Siderite

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

All of these

Pigment

Vehicle

Thinner

32. Acrylic is the name of

Cumarone-indene

Alkyd resin

Methyl methacrylate

Cellulose resin

33. Kaolin is chemically classified as

Siliceous rock

Metamorphic rock

Argillaceous rock

Calcareous rock

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

Rust proof

All of these

Water proof

Rot proof

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

Bauxite, Chromites, Dolomite, Magnesia

Dolomite, Magnesia, Bauxite, Chromites

None of these

Magnesia, Bauxite, Dolomite, Chromites

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

80%, 20%

50%, 50%

70%, 30%

60%, 40%

37. The rock generally used for roofing, is

Slate

Basalt

Pumice

Granite

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

90 kg/cm^2

100 kg/cm^2

120 kg/cm^2

75 kg/cm^2

39. Knots in timber are

Splits radiating from the centre

Defects caused by crushing fibres

Speckled strains

Signs of branches cut off

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

White lead

Zinc white

Titanium white

Red lead

Building Materials MCQs Set-11

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