Building Materials MCQs Set-11

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1. Wrought iron contains carbon upto

1.5 %

1.0 %

0.25 %

2.0 %

2. Acrylic is the name of

Cellulose resin

Alkyd resin

Cumarone-indene

Methyl methacrylate

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

75, 10, 15

15, 75, 10

10, 75, 15

10, 15, 75

4. Porcelain is used as:

Storage vessels

Reactor chambers

Sanitary wares

Electric insulators

5. The standard size of masonry bricks, is

20 cm × 10 cm × 10 cm

21 cm × 11 cm × 11 cm

18 cm × 8 cm × 8 cm

19 cm × 9 cm × 9 cm

6. Knots in timber are

Defects caused by crushing fibres

Speckled strains

Splits radiating from the centre

Signs of branches cut off

7. Pick up the polymineralic rock from the following:

Quartz sand

Magnesite

Pure gypsum

Granite

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

Quick setting cement

Low heat Portland cement

White cement

Rapid hardening cement

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

Red lead

White lead

Titanium white

Zinc white

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

Thinner

Vehicle

Pigment

All of these

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11. Bitumen felt is used for

(B) Damp proofing

(A) Water proofing

(D) Neither (A) nor (B)

(C) Both (A) and (B)

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

All of these

Water proof

Rot proof

Rust proof

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

80%, 20%

50%, 50%

60%, 40%

70%, 30%

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

Cast steel

Bessemer steel

Mild steel

Whitworth compressed steel

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

Fat lime

Poor lime

Quick lime

Hydraulic lime

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

Toughed cast iron

Mottled cast iron

Grey cast iron

White cast iron

17. Second class bricks

Are of dark brown color

Are under burnt

Produce a metallic sound when struck

Are well burnt

18. Acrylic sheets

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

All the above

Are generally unaffected by most household detergents

Possess the light transmission rate of 93%

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

Heart shakes

Cup shakes

Radial shakes

Star shakes

20. Pick up the hypabyssal rock from the following:

Granite

Dolerite

All of these

Basalt

Page 3 of 4

21. The specific gravity of marble, is

2.60

2.72

2.66

2.50

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

Calcining

Hydraulicity

Setting

Slacking

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

High carbon steel

Mild steel

Wrought iron

Stainless steel

25. Plastic asphalt is

A mixture of cement and asphalt

Used as a water proofing layer over roof

A refinery product

A natural asphalt

26. The melting point of silica is:

1730°C

1570°C

1850°C

1630°C

27. Kaolin is chemically classified as

Metamorphic rock

Calcareous rock

Argillaceous rock

Siliceous rock

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

Chrome steel

Vanadium steel

Manganese steel

Nickel steel

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

Argillaceous rock

Calcareous rock

Siliceous rock

None of these

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

Limonite

Magnetite

Iron pyrites

Siderite

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31. The rock generally used for roofing, is

Granite

Slate

Pumice

Basalt

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

Mottled pig

Grey or foundry pig

Bessemer pig

White forge pig

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

None of these

White lime

Rich lime

Fat lime

34. A well seasoned timber may contain moisture up to

6 to 8 %

10 to 12 %

8 to 10 %

4 to 6 %

35.

Stone ware

Earthen ware

Refractory clay

All of these

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

90 kg/cm^2

120 kg/cm^2

75 kg/cm^2

100 kg/cm^2

37. Stones used for rubble masonry must be

Heavy

Soft

Hard

Light

38. Lime stones are generally known as

All of these

Aqueous rocks

Sedimentary rocks

Stratified rocks

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

Gypsum

Dolerite

Sand stone

Gravel

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

Cementation process

Bessemer process

Crucible process

Open hearth process

Building Materials MCQs Set-11

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