Building Materials MCQs Set-11

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

120 kg/cm^2

90 kg/cm^2

75 kg/cm^2

100 kg/cm^2

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

None of these

Fat lime

White lime

Rich lime

3. A well seasoned timber may contain moisture up to

4 to 6 %

6 to 8 %

8 to 10 %

10 to 12 %

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

70%, 30%

60%, 40%

50%, 50%

80%, 20%

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

Gypsum

Dolerite

Gravel

Sand stone

6. The specific gravity of marble, is

2.60

2.50

2.66

2.72

7. Acrylic sheets

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

Possess the light transmission rate of 93%

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

Hydraulic lime

Poor lime

Quick lime

Fat lime

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

15, 75, 10

10, 15, 75

10, 75, 15

75, 10, 15

10. Pick up the polymineralic rock from the following:

Granite

Quartz sand

Magnesite

Pure gypsum

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

Rapid hardening cement

White cement

Quick setting cement

Low heat Portland cement

12. Kaolin is chemically classified as

Metamorphic rock

Argillaceous rock

Calcareous rock

Siliceous rock

13. Porcelain is used as:

Storage vessels

Electric insulators

Reactor chambers

Sanitary wares

14. Bitumen felt is used for

(A) Water proofing

(B) Damp proofing

(D) Neither (A) nor (B)

(C) Both (A) and (B)

15. Stones used for rubble masonry must be

Soft

Light

Heavy

Hard

16. Second class bricks

Produce a metallic sound when struck

Are well burnt

Are of dark brown color

Are under burnt

17. Knots in timber are

Defects caused by crushing fibres

Signs of branches cut off

Splits radiating from the centre

Speckled strains

18. Acrylic is the name of

Cumarone-indene

Cellulose resin

Alkyd resin

Methyl methacrylate

19. 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

Open hearth process

Cementation process

Bessemer process

Crucible process

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

All of these

Vehicle

Thinner

Pigment

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21. 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

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

Calcining

Setting

Hydraulicity

Slacking

23. The rock generally used for roofing, is

Basalt

Granite

Slate

Pumice

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

Grey or foundry pig

Bessemer pig

Mottled pig

White forge pig

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

Vanadium steel

Nickel steel

Chrome steel

Manganese steel

26. The standard size of masonry bricks, is

20 cm × 10 cm × 10 cm

19 cm × 9 cm × 9 cm

21 cm × 11 cm × 11 cm

18 cm × 8 cm × 8 cm

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

Titanium white

Red lead

Zinc white

White lead

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

Rot proof

All of these

Water proof

Rust proof

29. Plastic asphalt is

A natural asphalt

A refinery product

A mixture of cement and asphalt

Used as a water proofing layer over roof

30. Lime stones are generally known as

Stratified rocks

All of these

Sedimentary rocks

Aqueous rocks

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31. Wrought iron contains carbon upto

0.25 %

2.0 %

1.0 %

1.5 %

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

High carbon steel

Stainless steel

Wrought iron

Mild steel

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

Calcareous rock

Argillaceous rock

None of these

Siliceous rock

34. The melting point of silica is:

1630°C

1570°C

1730°C

1850°C

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

Bauxite, Chromites, Dolomite, Magnesia

Magnesia, Bauxite, Dolomite, Chromites

None of these

Dolomite, Magnesia, Bauxite, Chromites

36. Pick up the hypabyssal rock from the following:

Granite

Basalt

All of these

Dolerite

37.

All of these

Stone ware

Refractory clay

Earthen ware

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

Radial shakes

Star shakes

Heart shakes

Cup shakes

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

Siderite

Magnetite

Iron pyrites

Limonite

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

Whitworth compressed steel

Cast steel

Mild steel

Bessemer steel

Building Materials MCQs Set-11

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