Building Materials MCQs Set-11

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

90 kg/cm^2

75 kg/cm^2

100 kg/cm^2

120 kg/cm^2

2. Acrylic sheets

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%

Are generally unaffected by most household detergents

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

Grey cast iron

Mottled cast iron

White cast iron

Toughed cast iron

4. Bitumen felt is used for

(A) Water proofing

(B) Damp proofing

(C) Both (A) and (B)

(D) Neither (A) nor (B)

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

Dolerite

Gypsum

Gravel

Sand stone

6. A well seasoned timber may contain moisture up to

4 to 6 %

8 to 10 %

6 to 8 %

10 to 12 %

7. 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

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

Cast steel

Mild steel

Bessemer steel

Whitworth compressed steel

9. Second class bricks

Produce a metallic sound when struck

Are of dark brown color

Are under burnt

Are well burnt

10. Kaolin is chemically classified as

Argillaceous rock

Calcareous rock

Siliceous rock

Metamorphic rock

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11. The standard size of masonry bricks, is

19 cm × 9 cm × 9 cm

20 cm × 10 cm × 10 cm

18 cm × 8 cm × 8 cm

21 cm × 11 cm × 11 cm

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

Bessemer pig

White forge pig

Grey or foundry pig

Mottled pig

13.

Stone ware

All of these

Earthen ware

Refractory clay

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

Calcareous rock

Argillaceous rock

None of these

Siliceous rock

15. Wrought iron contains carbon upto

0.25 %

1.0 %

2.0 %

1.5 %

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

Magnesia, Bauxite, Dolomite, Chromites

Bauxite, Chromites, Dolomite, Magnesia

Dolomite, Magnesia, Bauxite, Chromites

None of these

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

All of these

Rust proof

Rot proof

Water proof

18. Lime stones are generally known as

Stratified rocks

All of these

Sedimentary rocks

Aqueous rocks

19. Pick up the polymineralic rock from the following:

Pure gypsum

Granite

Magnesite

Quartz sand

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

15, 75, 10

10, 75, 15

10, 15, 75

75, 10, 15

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21. The melting point of silica is:

1850°C

1630°C

1570°C

1730°C

22. Acrylic is the name of

Cumarone-indene

Methyl methacrylate

Alkyd resin

Cellulose resin

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

Poor lime

Fat lime

Hydraulic lime

Quick lime

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

60%, 40%

50%, 50%

70%, 30%

80%, 20%

25. Stones used for rubble masonry must be

Heavy

Hard

Soft

Light

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

Low heat Portland cement

White cement

Rapid hardening cement

Quick setting cement

27. Pick up the hypabyssal rock from the following:

All of these

Granite

Dolerite

Basalt

28. Porcelain is used as:

Sanitary wares

Reactor chambers

Electric insulators

Storage vessels

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

Stainless steel

High carbon steel

Wrought iron

Mild steel

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

Siderite

Iron pyrites

Limonite

Magnetite

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31. The specific gravity of marble, is

2.72

2.50

2.60

2.66

32. Plastic asphalt is

A natural asphalt

A refinery product

Used as a water proofing layer over roof

A mixture of cement and asphalt

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

Vanadium steel

Manganese steel

Nickel steel

Chrome steel

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

Pigment

Thinner

Vehicle

All of these

35. Knots in timber are

Speckled strains

Splits radiating from the centre

Defects caused by crushing fibres

Signs of branches cut off

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

White lime

Fat lime

Rich lime

None of these

37. The rock generally used for roofing, is

Granite

Basalt

Pumice

Slate

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

Zinc white

White lead

Titanium white

Red lead

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

Setting

Slacking

Hydraulicity

Calcining

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

Crucible process

Bessemer process

Cementation process

Open hearth process

Building Materials MCQs Set-11

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