Building Materials MCQs Set-9

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

Bessemer steel

Cast steel

Mild steel

Stainless steel

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

All of these

Its initial setting time is about one hour

It possesses less compressive strength

Its final setting time is about 10 hours

3. Excess of silica in brick earth results in

Enhancing the impermeability of bricks

Cracking and warping of bricks

None of these

Loss of cohesion

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

Oil varnish

Turpentine varnish

Water varnish

Spirit varnish

5. Plywood is made from

Bamboo fibre

Common timber

Teak wood only

Asbestos sheets

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

Iron ore, carbon and lime stone

Iron ore, coal and lime stone

Iron ore, coal and sulphur

Iron ore, carbon and sulphur

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

Anthophylite asbestos

Amosite asbestos

Actinolite asbestos

All of these

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

Di-calcium silicate

Tri-calcium aluminate

Tri-calcium silicate

All of these

9. Durability of building stone is affected by its

Texture

All the above

Chemical composition

Resistance to atmosphere

10. Glazing is used to make earthenware

Hard

Impervious

Porous

Soft

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11. A heavy stone is suitable for

Roads

Retaining walls

Rubble masonry

Arches

12. The commonly used lime in white washing, is

Quick lime

White lime

Fat lime

Hydraulic lime

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

Double Flemish bond

Zigzag bond

English bond

Single Flemish bond

14. For melting one tonne of cast iron

One quintal coke is required

All of these

700 m^3 air is required

20 kg limestone is required

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

70 to 80 %

5 to 10 %

50 to 60 %

20 to 30 %

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

Limestone

Marble

Slate

Quartzite

17. Stainless steel contains

36% of chromium and 12% of nickel

12% of chromium and 36% of nickel

8% of chromium and 18% of nickel

18% of chromium and 8% nickel

18. The slump recommended for mass concrete is about

25 mm to 50 mm

100 mm to 125 mm

50 mm to 100 mm

125 mm to 150 mm

19. Quick lime (or caustic lime)

All of these

Is amorphous

Is obtained by the calcination of pure lime stone

Has great affinity to moisture

20. The hardest rock is

Talc

Diamond

Quartz

Marble

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

Nickel

Manganese

Vanadium

Chromium

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

None of these

2.2 kg

1.5 kg

3.2 kg

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

Tensile strength of cement

Setting time of cement

Soundness of cement

compressive strength of cement

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

Carbon

Manganese

Sulphur

Iron

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

15 %

20 %

10 %

25 %

26. Granite is not suitable for ordinary building purpose because

It is not a fireproof material

It cannot be polished

It has less crushing strength

It is costly

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

Grey or foundry pig

White or forge pig

Bessemer pig

Mottled pig

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

Polystyrene

All of these

Polypropylene

Polyvinylchloride

29. Seasoning of timber is done for

Increasing strength of timber

Increasing moisture content

Decreasing moisture content

None to these

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

(B) Are affected by moisture

(C) Both (A) and (B)

None of these

(A) Split easily

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

Dampness

Absence of sunlight

All of these

Presence of sap

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

Of high degree of tenacity

Of good plasticity

Sufficiently pure

All of these

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

Carbon

Sulphur

Phosphorus

Silicon

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

Tri-calcium aluminate

Gypsum

Tri-calcium silicate

Di-calcium silicate

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

Tri-calcium aluminate

Di-calcium silicate

Tri-calcium silicate

Tetra-calcium alumino-ferrite

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

3.5 N/mm²

10.5 N/mm²

7.0 N/mm²

14.0 N/mm²

37. 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

Seasoning of stones

Blasting of stones

Dressing of stones

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

Brick bats

Headers

Stretchers

Queen closer

39. Percentage of carbon content in mild steel is

Between 0.25 and 0.7

Between 0.7 and 1.5

Greater than 1.5

Less than 0.25

40. Lacquer paints

Consist of resin and nitro-cellulose

Are less durable as compared to enamel paints

All of these

Are generally applied on structural steel

Building Materials MCQs Set-9

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