Building Materials MCQs Set-11

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1. Wrought iron contains carbon upto

2.0 %

1.5 %

0.25 %

1.0 %

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

Magnetite

Iron pyrites

Limonite

Siderite

3. Lime stones are generally known as

Sedimentary rocks

Aqueous rocks

Stratified rocks

All of these

4. The rock generally used for roofing, is

Granite

Pumice

Basalt

Slate

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

White lead

Zinc white

Titanium white

Red lead

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

15, 75, 10

10, 15, 75

75, 10, 15

10, 75, 15

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

Calcining

Setting

Hydraulicity

Slacking

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

Nickel steel

Vanadium steel

Manganese steel

Chrome steel

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

Mild steel

Whitworth compressed steel

Bessemer steel

Cast steel

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

Thinner

Vehicle

All of these

Pigment

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11. A well seasoned timber may contain moisture up to

8 to 10 %

4 to 6 %

10 to 12 %

6 to 8 %

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

None of these

Dolomite, Magnesia, Bauxite, Chromites

Bauxite, Chromites, Dolomite, Magnesia

Magnesia, Bauxite, Dolomite, Chromites

13. Knots in timber are

Signs of branches cut off

Splits radiating from the centre

Defects caused by crushing fibres

Speckled strains

14. 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

Bessemer process

Cementation process

Open hearth process

15. Stones used for rubble masonry must be

Hard

Heavy

Soft

Light

16. Acrylic sheets

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

Possess the light transmission rate of 93%

Are generally unaffected by most household detergents

All the above

17. Pick up the hypabyssal rock from the following:

Dolerite

All of these

Granite

Basalt

18. The melting point of silica is:

1850°C

1570°C

1630°C

1730°C

19.

All of these

Earthen ware

Stone ware

Refractory clay

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

80%, 20%

70%, 30%

60%, 40%

50%, 50%

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

None of these

Calcareous rock

Siliceous rock

Argillaceous rock

22. The standard size of masonry bricks, is

21 cm × 11 cm × 11 cm

20 cm × 10 cm × 10 cm

19 cm × 9 cm × 9 cm

18 cm × 8 cm × 8 cm

23. Plastic asphalt is

A refinery product

Used as a water proofing layer over roof

A natural asphalt

A mixture of cement and asphalt

24. Bitumen felt is used for

(A) Water proofing

(C) Both (A) and (B)

(B) Damp proofing

(D) Neither (A) nor (B)

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

Stainless steel

High carbon steel

Wrought iron

Mild steel

26. Kaolin is chemically classified as

Argillaceous rock

Calcareous rock

Siliceous rock

Metamorphic rock

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

90 kg/cm^2

120 kg/cm^2

75 kg/cm^2

100 kg/cm^2

28. Second class bricks

Are under burnt

Are of dark brown color

Are well burnt

Produce a metallic sound when struck

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

All of these

Rust proof

Water proof

Rot proof

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

Heart shakes

Radial shakes

Star shakes

Cup shakes

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

Dolerite

Gravel

Sand stone

Gypsum

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

Poor lime

Fat lime

Quick lime

Hydraulic lime

33. Acrylic is the name of

Cellulose resin

Cumarone-indene

Alkyd resin

Methyl methacrylate

34. The specific gravity of marble, is

2.66

2.60

2.72

2.50

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

None of these

Fat lime

White lime

Rich lime

36. Porcelain is used as:

Sanitary wares

Storage vessels

Reactor chambers

Electric insulators

37. 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

Grey cast iron

White cast iron

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

Low heat Portland cement

Quick setting cement

White cement

Rapid hardening cement

39. Pick up the polymineralic rock from the following:

Pure gypsum

Magnesite

Granite

Quartz sand

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

Bessemer pig

White forge pig

Mottled pig

Grey or foundry pig

Building Materials MCQs Set-11

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