Building Materials MCQs Set-11

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

High carbon steel

Wrought iron

Stainless steel

Mild steel

2. Plastic asphalt is

A mixture of cement and asphalt

A refinery product

A natural asphalt

Used as a water proofing layer over roof

3. Stones used for rubble masonry must be

Light

Hard

Heavy

Soft

4. A well seasoned timber may contain moisture up to

8 to 10 %

10 to 12 %

4 to 6 %

6 to 8 %

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

Bessemer steel

Mild steel

Whitworth compressed steel

Cast steel

6. Porcelain is used as:

Reactor chambers

Electric insulators

Sanitary wares

Storage vessels

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

10, 75, 15

10, 15, 75

15, 75, 10

75, 10, 15

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

None of these

Magnesia, Bauxite, Dolomite, Chromites

Bauxite, Chromites, Dolomite, Magnesia

Dolomite, Magnesia, Bauxite, Chromites

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

Heart shakes

Star shakes

Radial shakes

Cup shakes

10. Pick up the hypabyssal rock from the following:

All of these

Dolerite

Granite

Basalt

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

Gravel

Sand stone

Dolerite

Gypsum

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

White lime

None of these

Fat lime

Rich lime

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

Grey or foundry pig

Bessemer pig

White forge pig

Mottled pig

14. The melting point of silica is:

1570°C

1630°C

1730°C

1850°C

15. Bitumen felt is used for

(C) Both (A) and (B)

(A) Water proofing

(D) Neither (A) nor (B)

(B) Damp proofing

16. 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

Open hearth process

Crucible process

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

Hydraulic lime

Fat lime

Quick lime

Poor lime

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

Manganese steel

Vanadium steel

Chrome steel

Nickel steel

19. Acrylic sheets

Are generally unaffected by most household detergents

Possess the light transmission rate of 93%

All the above

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

20. The standard size of masonry bricks, is

19 cm × 9 cm × 9 cm

21 cm × 11 cm × 11 cm

18 cm × 8 cm × 8 cm

20 cm × 10 cm × 10 cm

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21. Knots in timber are

Splits radiating from the centre

Defects caused by crushing fibres

Speckled strains

Signs of branches cut off

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

Titanium white

Zinc white

Red lead

White lead

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

Hydraulicity

Setting

Slacking

Calcining

24. Kaolin is chemically classified as

Argillaceous rock

Calcareous rock

Metamorphic rock

Siliceous rock

25. 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

Grey cast iron

Toughed cast iron

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

100 kg/cm^2

75 kg/cm^2

120 kg/cm^2

90 kg/cm^2

27. Second class bricks

Produce a metallic sound when struck

Are well burnt

Are under burnt

Are of dark brown color

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

Magnetite

Siderite

Iron pyrites

Limonite

29.

Stone ware

Earthen ware

All of these

Refractory clay

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

Low heat Portland cement

White cement

Quick setting cement

Rapid hardening cement

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

Vehicle

Pigment

All of these

Thinner

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

70%, 30%

60%, 40%

80%, 20%

50%, 50%

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

Siliceous rock

Calcareous rock

None of these

Argillaceous rock

34. Wrought iron contains carbon upto

1.0 %

1.5 %

0.25 %

2.0 %

35. Acrylic is the name of

Cellulose resin

Cumarone-indene

Methyl methacrylate

Alkyd resin

36. The specific gravity of marble, is

2.60

2.50

2.72

2.66

37. Lime stones are generally known as

Stratified rocks

Sedimentary rocks

Aqueous rocks

All of these

38. Pick up the polymineralic rock from the following:

Granite

Pure gypsum

Quartz sand

Magnesite

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

All of these

Rot proof

Water proof

Rust proof

40. The rock generally used for roofing, is

Basalt

Pumice

Slate

Granite

Building Materials MCQs Set-11

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