Building Materials MCQs Set-11

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1. Stones used for rubble masonry must be

Light

Hard

Soft

Heavy

2. A well seasoned timber may contain moisture up to

8 to 10 %

6 to 8 %

4 to 6 %

10 to 12 %

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

Magnesia, Bauxite, Dolomite, Chromites

Dolomite, Magnesia, Bauxite, Chromites

None of these

Bauxite, Chromites, Dolomite, Magnesia

4. Kaolin is chemically classified as

Calcareous rock

Argillaceous rock

Siliceous rock

Metamorphic rock

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

Dolerite

Sand stone

Gypsum

Gravel

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

Red lead

Zinc white

White lead

Titanium white

7. The rock generally used for roofing, is

Slate

Granite

Basalt

Pumice

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

Star shakes

Cup shakes

Radial shakes

Heart shakes

9. Lime stones are generally known as

All of these

Stratified rocks

Sedimentary rocks

Aqueous rocks

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

White forge pig

Bessemer pig

Mottled pig

Grey or foundry pig

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11. Plastic asphalt is

A natural asphalt

A mixture of cement and asphalt

Used as a water proofing layer over roof

A refinery product

12. Acrylic is the name of

Cellulose resin

Alkyd resin

Cumarone-indene

Methyl methacrylate

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

Poor lime

Quick lime

Hydraulic lime

Fat lime

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

Thinner

All of these

Vehicle

Pigment

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

White cement

Rapid hardening cement

Quick setting cement

Low heat Portland cement

16. The specific gravity of marble, is

2.60

2.66

2.72

2.50

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

Iron pyrites

Magnetite

Siderite

Limonite

18. Porcelain is used as:

Storage vessels

Sanitary wares

Reactor chambers

Electric insulators

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

Crucible process

Cementation process

Open hearth process

Bessemer process

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

80%, 20%

60%, 40%

50%, 50%

70%, 30%

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

Hydraulicity

Setting

Slacking

Calcining

22. Bitumen felt is used for

(A) Water proofing

(B) Damp proofing

(D) Neither (A) nor (B)

(C) Both (A) and (B)

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

Grey cast iron

Toughed cast iron

Mottled cast iron

White cast iron

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

Fat lime

White lime

Rich lime

None of these

25. Wrought iron contains carbon upto

1.0 %

2.0 %

0.25 %

1.5 %

26. The melting point of silica is:

1730°C

1570°C

1850°C

1630°C

27. Second class bricks

Produce a metallic sound when struck

Are well burnt

Are under burnt

Are of dark brown color

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

High carbon steel

Stainless steel

Wrought iron

Mild steel

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

15, 75, 10

10, 75, 15

75, 10, 15

10, 15, 75

30.

Earthen ware

Stone ware

All of these

Refractory clay

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

Whitworth compressed steel

Bessemer steel

Cast steel

Mild steel

32. Pick up the polymineralic rock from the following:

Granite

Magnesite

Quartz sand

Pure gypsum

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

Vanadium steel

Nickel steel

Chrome steel

Manganese steel

34. Knots in timber are

Speckled strains

Signs of branches cut off

Splits radiating from the centre

Defects caused by crushing fibres

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

90 kg/cm^2

100 kg/cm^2

120 kg/cm^2

75 kg/cm^2

36. The standard size of masonry bricks, is

19 cm × 9 cm × 9 cm

20 cm × 10 cm × 10 cm

21 cm × 11 cm × 11 cm

18 cm × 8 cm × 8 cm

37. Pick up the hypabyssal rock from the following:

Dolerite

Basalt

Granite

All of these

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

Rot proof

Water proof

Rust proof

All of these

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

Calcareous rock

None of these

Siliceous rock

Argillaceous rock

40. Acrylic sheets

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

Possess the light transmission rate of 93%

All the above

Are generally unaffected by most household detergents

Building Materials MCQs Set-11

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