Building Materials MCQs Set-9

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1. Which one of the following is acid resistant asbestos?

Actinolite asbestos

All of these

Anthophylite asbestos

Amosite asbestos

2. Which of the following should be used for hearting of thicker walls?

Queen closer

Brick bats

Headers

Stretchers

3. Quick lime (or caustic lime)

Has great affinity to moisture

Is obtained by the calcination of pure lime stone

Is amorphous

All of these

4. Pick up the correct statement regarding low heat cement from the following:

Its final setting time is about 10 hours

Its initial setting time is about one hour

All of these

It possesses less compressive strength

5. For slaking of 10 kg of CaO, the theoretical amount of water is

2.2 kg

3.2 kg

None of these

1.5 kg

6. Excess of silica in brick earth results in

Cracking and warping of bricks

Loss of cohesion

None of these

Enhancing the impermeability of bricks

7. Pig iron made from haematite ores free from sulphur, phosphorus and copper, is known as

Grey or foundry pig

White or forge pig

Mottled pig

Bessemer pig

8. In stone masonry, if stones are so placed that their layers are parallel to the direction of load, they

None of these

(C) Both (A) and (B)

(A) Split easily

(B) Are affected by moisture

9. Glazing is used to make earthenware

Impervious

Soft

Hard

Porous

10. The main constituent of cement which is responsible for initial setting of cement is

All of these

Di-calcium silicate

Tri-calcium silicate

Tri-calcium aluminate

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11. Stainless steel contains

12% of chromium and 36% of nickel

8% of chromium and 18% of nickel

36% of chromium and 12% of nickel

18% of chromium and 8% nickel

12. The commonly used lime in white washing, is

White lime

Fat lime

Quick lime

Hydraulic lime

13. To give a brilliant finish, the type of varnish used, is

Turpentine varnish

Oil varnish

Water varnish

Spirit varnish

14. Which of the following gradients exerts maximum influence on properties of steel?

Iron

Sulphur

Manganese

Carbon

15. To retard the initial setting time of cement, the compound responsible, is

Tri-calcium aluminate

Tri-calcium silicate

Gypsum

Di-calcium silicate

16. Durability of building stone is affected by its

Resistance to atmosphere

Chemical composition

All the above

Texture

17. For preparing porcelains, the clay should beFor preparing porcelains, the clay should be

Of high degree of tenacity

All of these

Of good plasticity

Sufficiently pure

18. Red short iron cracks when bent due to the presence of

Carbon

Phosphorus

Silicon

Sulphur

19. For melting one tonne of cast iron

All of these

20 kg limestone is required

One quintal coke is required

700 m^3 air is required

20. Lacquer paints

All of these

Are less durable as compared to enamel paints

Are generally applied on structural steel

Consist of resin and nitro-cellulose

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21. Three basic raw materials which are needed in large quantities for production of steel are

Iron ore, carbon and sulphur

Iron ore, coal and sulphur

Iron ore, coal and lime stone

Iron ore, carbon and lime stone

22. Seasoning of timber is done for

Increasing moisture content

Increasing strength of timber

None to these

Decreasing moisture content

23. Le-Chatelier's device is used for determining the

Tensile strength of cement

Soundness of cement

Setting time of cement

compressive strength of cement

24. In the cement the compound quickest to react with water, is

Tetra-calcium alumino-ferrite

Tri-calcium aluminate

Di-calcium silicate

Tri-calcium silicate

25. A heavy stone is suitable for

Arches

Roads

Retaining walls

Rubble masonry

26. The steel used for the manufacture of rails, is

Mild steel

Cast steel

Bessemer steel

Stainless steel

27. Pick up the most favorable condition for the rapid growth of fungus for dry rot from the following:

Dampness

All of these

Presence of sap

Absence of sunlight

28. The method of addition polymerization is used for obtaining:

Polypropylene

Polystyrene

All of these

Polyvinylchloride

29. The slump recommended for mass concrete is about

125 mm to 150 mm

100 mm to 125 mm

50 mm to 100 mm

25 mm to 50 mm

30. In brick masonry the bond produced by laying alternate headers and stretchers in each course is known as

Zigzag bond

English bond

Double Flemish bond

Single Flemish bond

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31. The percentage of alumina in a good brick earth lies between

20 to 30 %

50 to 60 %

70 to 80 %

5 to 10 %

32. Granite is not suitable for ordinary building purpose because

It is costly

It has less crushing strength

It cannot be polished

It is not a fireproof material

33. Crushing strength of a first class brick should not be less than

14.0 N/mm²

7.0 N/mm²

10.5 N/mm²

3.5 N/mm²

34. Percentage of carbon content in mild steel is

Between 0.25 and 0.7

Less than 0.25

Between 0.7 and 1.5

Greater than 1.5

35. The yield strength and tensile strength of low carbon steel may be improved by the addition of

Vanadium

Nickel

Manganese

Chromium

36. Plywood is made from

Common timber

Teak wood only

Bamboo fibre

Asbestos sheets

37. Which of the following metamorphic rocks has the most weather resisting characteristics?

Limestone

Quartzite

Marble

Slate

38. A 1st class brick immersed in water for 24 hours, should not absorb water (by weight) more than

10 %

20 %

25 %

15 %

39. The preparation of surface of stone to obtain plain edges or to obtain stones of required size and shape is known as

Quarrying of stones

Blasting of stones

Seasoning of stones

Dressing of stones

40. The hardest rock is

Diamond

Quartz

Talc

Marble

Building Materials MCQs Set-9

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