Building Materials MCQs Set-11

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

Setting

Calcining

Slacking

Hydraulicity

2. 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

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

Limonite

Magnetite

Iron pyrites

Siderite

4. Bitumen felt is used for

(A) Water proofing

(B) Damp proofing

(C) Both (A) and (B)

(D) Neither (A) nor (B)

5. Acrylic is the name of

Methyl methacrylate

Alkyd resin

Cellulose resin

Cumarone-indene

6. 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

Mottled cast iron

Toughed cast iron

Grey cast iron

7. The melting point of silica is:

1730°C

1630°C

1850°C

1570°C

8. Knots in timber are

Signs of branches cut off

Speckled strains

Defects caused by crushing fibres

Splits radiating from the centre

9. Acrylic sheets

Possess the light transmission rate of 93%

All the above

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

Are generally unaffected by most household detergents

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

Cast steel

Whitworth compressed steel

Bessemer steel

Mild steel

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11. Pick up the hypabyssal rock from the following:

Basalt

All of these

Dolerite

Granite

12. A well seasoned timber may contain moisture up to

8 to 10 %

4 to 6 %

6 to 8 %

10 to 12 %

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

Wrought iron

Mild steel

High carbon steel

Stainless steel

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

Cementation process

Open hearth process

Crucible process

Bessemer process

15. The rock generally used for roofing, is

Pumice

Slate

Basalt

Granite

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

White lime

None of these

Fat lime

Rich lime

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

Bauxite, Chromites, Dolomite, Magnesia

None of these

Magnesia, Bauxite, Dolomite, Chromites

Dolomite, Magnesia, Bauxite, Chromites

18. The specific gravity of marble, is

2.72

2.66

2.50

2.60

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

120 kg/cm^2

90 kg/cm^2

100 kg/cm^2

75 kg/cm^2

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

Gravel

Gypsum

Sand stone

Dolerite

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

Manganese steel

Vanadium steel

Nickel steel

Chrome steel

22. The standard size of masonry bricks, is

21 cm × 11 cm × 11 cm

19 cm × 9 cm × 9 cm

20 cm × 10 cm × 10 cm

18 cm × 8 cm × 8 cm

23. Lime stones are generally known as

Sedimentary rocks

All of these

Stratified rocks

Aqueous rocks

24. Pick up the polymineralic rock from the following:

Pure gypsum

Quartz sand

Granite

Magnesite

25. Porcelain is used as:

Sanitary wares

Reactor chambers

Storage vessels

Electric insulators

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

Fat lime

Poor lime

Quick lime

Hydraulic lime

27. Second class bricks

Produce a metallic sound when struck

Are of dark brown color

Are under burnt

Are well burnt

28. Stones used for rubble masonry must be

Soft

Hard

Heavy

Light

29.

All of these

Stone ware

Earthen ware

Refractory clay

30. 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

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31. Wrought iron contains carbon upto

2.0 %

1.5 %

1.0 %

0.25 %

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

60%, 40%

70%, 30%

50%, 50%

80%, 20%

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

White forge pig

Mottled pig

Bessemer pig

Grey or foundry pig

34. Plastic asphalt is

A mixture of cement and asphalt

A natural asphalt

A refinery product

Used as a water proofing layer over roof

35. Kaolin is chemically classified as

Metamorphic rock

Argillaceous rock

Calcareous rock

Siliceous rock

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

Pigment

Vehicle

Thinner

All of these

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

Radial shakes

Heart shakes

Cup shakes

Star shakes

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 :

None of these

Calcareous rock

Siliceous rock

Argillaceous rock

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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