Building Materials MCQs Set-11

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1. 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

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

Mottled pig

Grey or foundry pig

Bessemer pig

White forge pig

3. Plastic asphalt is

A natural asphalt

A refinery product

A mixture of cement and asphalt

Used as a water proofing layer over roof

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

Mild steel

Whitworth compressed steel

Cast steel

Bessemer steel

5. The rock generally used for roofing, is

Slate

Pumice

Granite

Basalt

6. The melting point of silica is:

1850°C

1570°C

1630°C

1730°C

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

Wrought iron

Stainless steel

High carbon steel

Mild steel

8. Wrought iron contains carbon upto

2.0 %

0.25 %

1.5 %

1.0 %

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

Hydraulicity

Calcining

Slacking

Setting

10. Porcelain is used as:

Sanitary wares

Electric insulators

Reactor chambers

Storage vessels

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11. Second class bricks

Produce a metallic sound when struck

Are well burnt

Are of dark brown color

Are under burnt

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

Pigment

Vehicle

Thinner

All of these

13. 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

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

75, 10, 15

10, 15, 75

15, 75, 10

10, 75, 15

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

80%, 20%

60%, 40%

50%, 50%

70%, 30%

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

Siderite

Magnetite

Limonite

Iron pyrites

17. 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

18. Lime stones are generally known as

Aqueous rocks

All of these

Sedimentary rocks

Stratified rocks

19.

All of these

Stone ware

Refractory clay

Earthen ware

20. 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

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21. Acrylic is the name of

Methyl methacrylate

Alkyd resin

Cellulose resin

Cumarone-indene

22. Kaolin is chemically classified as

Argillaceous rock

Calcareous rock

Siliceous rock

Metamorphic rock

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

Cup shakes

Heart shakes

Star shakes

Radial shakes

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

Gravel

Dolerite

Gypsum

Sand stone

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

Siliceous rock

Argillaceous rock

Calcareous rock

None of these

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

Low heat Portland cement

Quick setting cement

White cement

Rapid hardening cement

27. Pick up the hypabyssal rock from the following:

Dolerite

Granite

All of these

Basalt

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

Chrome steel

Vanadium steel

Nickel steel

Manganese steel

29. Pick up the polymineralic rock from the following:

Quartz sand

Granite

Pure gypsum

Magnesite

30. A well seasoned timber may contain moisture up to

10 to 12 %

8 to 10 %

4 to 6 %

6 to 8 %

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

Water proof

Rust proof

All of these

Rot proof

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

Rich lime

Fat lime

None of these

White lime

33. The specific gravity of marble, is

2.72

2.66

2.60

2.50

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

Quick lime

Hydraulic lime

Poor lime

Fat lime

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

Titanium white

Zinc white

Red lead

White lead

36. 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

Crucible process

Open hearth process

37. Stones used for rubble masonry must be

Heavy

Light

Hard

Soft

38. Bitumen felt is used for

(C) Both (A) and (B)

(A) Water proofing

(D) Neither (A) nor (B)

(B) Damp proofing

39. Acrylic sheets

Possess the light transmission rate of 93%

All the above

Are generally unaffected by most household detergents

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

40. Knots in timber are

Splits radiating from the centre

Speckled strains

Defects caused by crushing fibres

Signs of branches cut off

Building Materials MCQs Set-11

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