Building Materials MCQs Set-11

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1. Pick up the hypabyssal rock from the following:

All of these

Basalt

Granite

Dolerite

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

All of these

Rot proof

Rust proof

Water proof

3. Stones used for rubble masonry must be

Hard

Soft

Light

Heavy

4. The rock generally used for roofing, is

Pumice

Granite

Slate

Basalt

5. 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

Open hearth process

Crucible process

Cementation process

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

White lime

Fat lime

None of these

Rich lime

7. Pick up the polymineralic rock from the following:

Pure gypsum

Magnesite

Granite

Quartz sand

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

Grey or foundry pig

White forge pig

Bessemer pig

Mottled pig

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

Fat lime

Hydraulic lime

Quick lime

Poor lime

10. Bitumen felt is used for

(B) Damp proofing

(C) Both (A) and (B)

(A) Water proofing

(D) Neither (A) nor (B)

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

Iron pyrites

Magnetite

Limonite

Siderite

12. Second class bricks

Produce a metallic sound when struck

Are under burnt

Are well burnt

Are of dark brown color

13. Acrylic is the name of

Cumarone-indene

Cellulose resin

Alkyd resin

Methyl methacrylate

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

15, 75, 10

75, 10, 15

10, 15, 75

10, 75, 15

15. A well seasoned timber may contain moisture up to

6 to 8 %

4 to 6 %

8 to 10 %

10 to 12 %

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

Chrome steel

Nickel steel

Vanadium steel

Manganese steel

17. 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

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

All of these

Thinner

Vehicle

Pigment

19. The specific gravity of marble, is

2.72

2.60

2.50

2.66

20. 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

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

Gypsum

Dolerite

Gravel

Sand stone

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

Magnesia, Bauxite, Dolomite, Chromites

Bauxite, Chromites, Dolomite, Magnesia

None of these

Dolomite, Magnesia, Bauxite, Chromites

23.

Refractory clay

All of these

Earthen ware

Stone ware

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

50%, 50%

60%, 40%

80%, 20%

70%, 30%

25. The standard size of masonry bricks, is

18 cm × 8 cm × 8 cm

21 cm × 11 cm × 11 cm

19 cm × 9 cm × 9 cm

20 cm × 10 cm × 10 cm

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

Slacking

Hydraulicity

Calcining

Setting

27. Lime stones are generally known as

Sedimentary rocks

Aqueous rocks

Stratified rocks

All of these

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

Red lead

Zinc white

White lead

Titanium white

29. The melting point of silica is:

1630°C

1850°C

1730°C

1570°C

30. Acrylic sheets

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

Possess the light transmission rate of 93%

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

High carbon steel

Wrought iron

Mild steel

Stainless steel

32. 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

White cast iron

Grey cast iron

Toughed cast iron

33. Porcelain is used as:

Sanitary wares

Reactor chambers

Electric insulators

Storage vessels

34. Kaolin is chemically classified as

Argillaceous rock

Metamorphic rock

Calcareous rock

Siliceous rock

35. Plastic asphalt is

A refinery product

Used as a water proofing layer over roof

A natural asphalt

A mixture of cement and asphalt

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

Cast steel

Whitworth compressed steel

Bessemer steel

Mild steel

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

Calcareous rock

Siliceous rock

Argillaceous rock

None of these

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

Low heat Portland cement

White cement

Quick setting cement

Rapid hardening cement

39. Knots in timber are

Speckled strains

Signs of branches cut off

Defects caused by crushing fibres

Splits radiating from the centre

40. Wrought iron contains carbon upto

0.25 %

1.5 %

1.0 %

2.0 %

Building Materials MCQs Set-11

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