Building Materials MCQs Set-11

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

15, 75, 10

10, 15, 75

10, 75, 15

75, 10, 15

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

Mild steel

Cast steel

Bessemer steel

Whitworth compressed steel

3. Bitumen felt is used for

(B) Damp proofing

(C) Both (A) and (B)

(A) Water proofing

(D) Neither (A) nor (B)

4. Pick up the hypabyssal rock from the following:

All of these

Dolerite

Basalt

Granite

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

Siliceous rock

Calcareous rock

Argillaceous rock

None of these

6. 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

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

Pigment

Thinner

All of these

Vehicle

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

Red lead

Titanium white

Zinc white

White lead

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

White lime

Fat lime

Rich lime

None of these

10. Porcelain is used as:

Storage vessels

Reactor chambers

Electric insulators

Sanitary wares

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11. Acrylic is the name of

Alkyd resin

Cumarone-indene

Methyl methacrylate

Cellulose resin

12. Acrylic sheets

Are generally unaffected by most household detergents

All the above

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

Possess the light transmission rate of 93%

13. 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

Open hearth process

Cementation process

Crucible process

Bessemer process

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

Dolomite, Magnesia, Bauxite, Chromites

None of these

Bauxite, Chromites, Dolomite, Magnesia

Magnesia, Bauxite, Dolomite, Chromites

15. Kaolin is chemically classified as

Metamorphic rock

Argillaceous rock

Siliceous rock

Calcareous rock

16. Lime stones are generally known as

All of these

Aqueous rocks

Stratified rocks

Sedimentary rocks

17. Pick up the polymineralic rock from the following:

Magnesite

Granite

Quartz sand

Pure gypsum

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

Sand stone

Gypsum

Gravel

Dolerite

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

Hydraulic lime

Quick lime

Fat lime

Poor lime

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

Rot proof

Rust proof

All of these

Water proof

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

Hydraulicity

Calcining

Setting

Slacking

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

White forge pig

Grey or foundry pig

Mottled pig

Bessemer pig

23. The melting point of silica is:

1730°C

1570°C

1630°C

1850°C

24. A well seasoned timber may contain moisture up to

4 to 6 %

6 to 8 %

10 to 12 %

8 to 10 %

25. The standard size of masonry bricks, is

18 cm × 8 cm × 8 cm

20 cm × 10 cm × 10 cm

19 cm × 9 cm × 9 cm

21 cm × 11 cm × 11 cm

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

White cement

Quick setting cement

Rapid hardening cement

Low heat Portland cement

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

80%, 20%

70%, 30%

50%, 50%

60%, 40%

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

Nickel steel

Manganese steel

Vanadium steel

Chrome steel

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

Wrought iron

High carbon steel

Mild steel

Stainless steel

30.

All of these

Stone ware

Earthen ware

Refractory clay

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31. Wrought iron contains carbon upto

2.0 %

0.25 %

1.5 %

1.0 %

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

120 kg/cm^2

75 kg/cm^2

100 kg/cm^2

90 kg/cm^2

33. 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

Mottled cast iron

Toughed cast iron

White cast iron

34. Second class bricks

Are well burnt

Produce a metallic sound when struck

Are of dark brown color

Are under burnt

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

Siderite

Magnetite

Iron pyrites

Limonite

36. Stones used for rubble masonry must be

Heavy

Light

Hard

Soft

37. The specific gravity of marble, is

2.60

2.72

2.50

2.66

38. Knots in timber are

Signs of branches cut off

Defects caused by crushing fibres

Speckled strains

Splits radiating from the centre

39. Plastic asphalt is

A mixture of cement and asphalt

A natural asphalt

A refinery product

Used as a water proofing layer over roof

40. The rock generally used for roofing, is

Slate

Pumice

Basalt

Granite

Building Materials MCQs Set-11

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