Building Materials MCQs Set-11

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

Titanium white

White lead

Red lead

Zinc white

2. 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

Bessemer process

Cementation process

Open hearth process

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

75, 10, 15

10, 15, 75

15, 75, 10

10, 75, 15

4. The melting point of silica is:

1570°C

1630°C

1730°C

1850°C

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

Low heat Portland cement

White cement

Rapid hardening cement

Quick setting cement

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

Mottled pig

White forge pig

Grey or foundry pig

Bessemer pig

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

Limonite

Iron pyrites

Siderite

Magnetite

8. Lime stones are generally known as

All of these

Sedimentary rocks

Stratified rocks

Aqueous rocks

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

Gravel

Gypsum

Sand stone

Dolerite

10. Porcelain is used as:

Storage vessels

Reactor chambers

Sanitary wares

Electric insulators

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

Chrome steel

Manganese steel

Vanadium steel

Nickel steel

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

80%, 20%

60%, 40%

50%, 50%

70%, 30%

13. Kaolin is chemically classified as

Argillaceous rock

Calcareous rock

Metamorphic rock

Siliceous rock

14. A well seasoned timber may contain moisture up to

6 to 8 %

10 to 12 %

8 to 10 %

4 to 6 %

15.

All of these

Stone ware

Earthen ware

Refractory clay

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

Argillaceous rock

Calcareous rock

Siliceous rock

None of these

17. Acrylic is the name of

Cumarone-indene

Cellulose resin

Methyl methacrylate

Alkyd resin

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

Rich lime

White lime

None of these

Fat lime

19. Plastic asphalt is

A refinery product

Used as a water proofing layer over roof

A natural asphalt

A mixture of cement and asphalt

20. The specific gravity of marble, is

2.66

2.60

2.72

2.50

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21. Stones used for rubble masonry must be

Soft

Hard

Heavy

Light

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

Mild steel

Whitworth compressed steel

Bessemer steel

Cast steel

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

Dolomite, Magnesia, Bauxite, Chromites

Magnesia, Bauxite, Dolomite, Chromites

None of these

Bauxite, Chromites, Dolomite, Magnesia

24. Pick up the polymineralic rock from the following:

Quartz sand

Granite

Magnesite

Pure gypsum

25. Acrylic sheets

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%

Are generally unaffected by most household detergents

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

Rot proof

Rust proof

All of these

Water proof

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

High carbon steel

Stainless steel

Mild steel

Wrought iron

28. 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

29. Second class bricks

Are well burnt

Produce a metallic sound when struck

Are under burnt

Are of dark brown color

30. Bitumen felt is used for

(A) Water proofing

(C) Both (A) and (B)

(D) Neither (A) nor (B)

(B) Damp proofing

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

90 kg/cm^2

75 kg/cm^2

100 kg/cm^2

120 kg/cm^2

32. Knots in timber are

Speckled strains

Defects caused by crushing fibres

Splits radiating from the centre

Signs of branches cut off

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

All of these

Pigment

Vehicle

Thinner

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

Hydraulic lime

Fat lime

Poor lime

Quick lime

35. Wrought iron contains carbon upto

1.5 %

2.0 %

0.25 %

1.0 %

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

Mottled cast iron

Toughed cast iron

White cast iron

Grey cast iron

37. Pick up the hypabyssal rock from the following:

All of these

Granite

Basalt

Dolerite

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

Cup shakes

Radial shakes

Heart shakes

Star shakes

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

Calcining

Hydraulicity

Slacking

Setting

40. The rock generally used for roofing, is

Slate

Basalt

Granite

Pumice

Building Materials MCQs Set-11

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