Building Materials MCQs Set-11

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1. Pick up the hypabyssal rock from the following:

Dolerite

Granite

Basalt

All of these

2. The specific gravity of marble, is

2.60

2.66

2.50

2.72

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

Bessemer pig

Grey or foundry pig

White forge pig

Mottled pig

4. A well seasoned timber may contain moisture up to

4 to 6 %

8 to 10 %

6 to 8 %

10 to 12 %

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

Manganese steel

Vanadium steel

Chrome steel

Nickel steel

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

Hydraulic lime

Fat lime

Poor lime

Quick lime

7. Stones used for rubble masonry must be

Soft

Hard

Light

Heavy

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

120 kg/cm^2

75 kg/cm^2

90 kg/cm^2

100 kg/cm^2

9. The melting point of silica is:

1630°C

1570°C

1730°C

1850°C

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

White lead

Red lead

Titanium white

Zinc white

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11. Porcelain is used as:

Storage vessels

Reactor chambers

Electric insulators

Sanitary wares

12. Knots in timber are

Splits radiating from the centre

Defects caused by crushing fibres

Speckled strains

Signs of branches cut off

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

Radial shakes

Star shakes

Cup shakes

Heart shakes

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

Magnetite

Siderite

Iron pyrites

Limonite

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

Bessemer steel

Cast steel

Whitworth compressed steel

Mild steel

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

50%, 50%

60%, 40%

80%, 20%

70%, 30%

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

Gypsum

Gravel

Sand stone

Dolerite

18. Kaolin is chemically classified as

Calcareous rock

Siliceous rock

Metamorphic rock

Argillaceous rock

19. Acrylic is the name of

Methyl methacrylate

Cellulose resin

Alkyd resin

Cumarone-indene

20.

Refractory clay

All of these

Earthen ware

Stone ware

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21. Acrylic sheets

Possess the light transmission rate of 93%

Are generally unaffected by most household detergents

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

All the above

22. Plastic asphalt is

A natural asphalt

Used as a water proofing layer over roof

A refinery product

A mixture of cement and asphalt

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

Bauxite, Chromites, Dolomite, Magnesia

None of these

Dolomite, Magnesia, Bauxite, Chromites

Magnesia, Bauxite, Dolomite, Chromites

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

Fat lime

None of these

White lime

Rich lime

25. Wrought iron contains carbon upto

1.5 %

0.25 %

2.0 %

1.0 %

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

White cast iron

Toughed cast iron

Mottled cast iron

Grey cast iron

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

Setting

Calcining

Hydraulicity

Slacking

28. Bitumen felt is used for

(C) Both (A) and (B)

(A) Water proofing

(B) Damp proofing

(D) Neither (A) nor (B)

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

Pigment

Thinner

Vehicle

All of these

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

Mild steel

Wrought iron

High carbon steel

Stainless steel

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31. Second class bricks

Are well burnt

Are under burnt

Are of dark brown color

Produce a metallic sound when struck

32. The rock generally used for roofing, is

Basalt

Pumice

Slate

Granite

33. The standard size of masonry bricks, is

20 cm × 10 cm × 10 cm

18 cm × 8 cm × 8 cm

19 cm × 9 cm × 9 cm

21 cm × 11 cm × 11 cm

34. Lime stones are generally known as

Aqueous rocks

Stratified rocks

All of these

Sedimentary rocks

35. Pick up the polymineralic rock from the following:

Granite

Quartz sand

Pure gypsum

Magnesite

36. 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

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

75, 10, 15

10, 15, 75

10, 75, 15

15, 75, 10

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

Rot proof

Rust proof

All of these

Water proof

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

Argillaceous rock

None of these

Siliceous rock

Calcareous rock

40. 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

Building Materials MCQs Set-11

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