Building Materials MCQs Set-11

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

Nickel steel

Vanadium steel

Manganese steel

Chrome steel

2. The specific gravity of marble, is

2.50

2.66

2.72

2.60

3. Second class bricks

Are under burnt

Produce a metallic sound when struck

Are of dark brown color

Are well burnt

4. Kaolin is chemically classified as

Metamorphic rock

Siliceous rock

Argillaceous rock

Calcareous rock

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

White forge pig

Grey or foundry pig

Mottled pig

Bessemer pig

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

Cup shakes

Heart shakes

Radial shakes

Star shakes

7. Knots in timber are

Speckled strains

Splits radiating from the centre

Defects caused by crushing fibres

Signs of branches cut off

8. 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

Crucible process

Open hearth process

Cementation process

9. Acrylic is the name of

Cumarone-indene

Methyl methacrylate

Alkyd resin

Cellulose resin

10. Wrought iron contains carbon upto

1.0 %

2.0 %

0.25 %

1.5 %

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11. 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

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

120 kg/cm^2

100 kg/cm^2

75 kg/cm^2

90 kg/cm^2

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

Setting

Calcining

Hydraulicity

Slacking

14. Plastic asphalt is

A mixture of cement and asphalt

Used as a water proofing layer over roof

A natural asphalt

A refinery product

15. The rock generally used for roofing, is

Basalt

Pumice

Slate

Granite

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

Water proof

Rot proof

All of these

Rust proof

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

Wrought iron

High carbon steel

Mild steel

Stainless steel

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

Hydraulic lime

Poor lime

Quick lime

Fat lime

19. Lime stones are generally known as

All of these

Stratified rocks

Sedimentary rocks

Aqueous rocks

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

Gravel

Dolerite

Gypsum

Sand stone

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

Quick setting cement

Low heat Portland cement

Rapid hardening cement

White cement

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

None of these

Calcareous rock

Argillaceous rock

Siliceous rock

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

None of these

White lime

Fat lime

Rich lime

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

Thinner

All of these

Vehicle

Pigment

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

None of these

Bauxite, Chromites, Dolomite, Magnesia

Dolomite, Magnesia, Bauxite, Chromites

Magnesia, Bauxite, Dolomite, Chromites

26. Porcelain is used as:

Sanitary wares

Reactor chambers

Storage vessels

Electric insulators

27. 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

28. Acrylic sheets

All the above

Are generally unaffected by most household detergents

Possess the light transmission rate of 93%

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

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

Zinc white

Titanium white

White lead

Red lead

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

10, 15, 75

75, 10, 15

15, 75, 10

10, 75, 15

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31. A well seasoned timber may contain moisture up to

4 to 6 %

6 to 8 %

10 to 12 %

8 to 10 %

32. Bitumen felt is used for

(C) Both (A) and (B)

(A) Water proofing

(B) Damp proofing

(D) Neither (A) nor (B)

33. Pick up the hypabyssal rock from the following:

Basalt

Granite

All of these

Dolerite

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

Cast steel

Bessemer steel

Mild steel

Whitworth compressed steel

35.

Stone ware

Refractory clay

All of these

Earthen ware

36. Pick up the polymineralic rock from the following:

Granite

Pure gypsum

Quartz sand

Magnesite

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

60%, 40%

80%, 20%

50%, 50%

70%, 30%

38. The melting point of silica is:

1730°C

1570°C

1850°C

1630°C

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

Siderite

Limonite

Iron pyrites

Magnetite

40. Stones used for rubble masonry must be

Heavy

Light

Soft

Hard

Building Materials MCQs Set-11

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