Building Materials MCQs Set-9

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

Di-calcium silicate

Tetra-calcium alumino-ferrite

Tri-calcium aluminate

Tri-calcium silicate

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

Queen closer

Headers

Brick bats

Stretchers

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

Cast steel

Mild steel

Stainless steel

Bessemer steel

4. Plywood is made from

Asbestos sheets

Bamboo fibre

Teak wood only

Common timber

5. The slump recommended for mass concrete is about

25 mm to 50 mm

125 mm to 150 mm

100 mm to 125 mm

50 mm to 100 mm

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

Tri-calcium aluminate

Di-calcium silicate

Tri-calcium silicate

All of these

7. 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

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

Vanadium

Manganese

Chromium

Nickel

9. Excess of silica in brick earth results in

Enhancing the impermeability of bricks

None of these

Cracking and warping of bricks

Loss of cohesion

10. The commonly used lime in white washing, is

Fat lime

Hydraulic lime

White lime

Quick lime

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

20 to 30 %

50 to 60 %

5 to 10 %

70 to 80 %

12. Stainless steel contains

12% of chromium and 36% of nickel

8% of chromium and 18% of nickel

18% of chromium and 8% nickel

36% of chromium and 12% of nickel

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

Tri-calcium aluminate

Tri-calcium silicate

Gypsum

Di-calcium silicate

14. The hardest rock is

Talc

Quartz

Marble

Diamond

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

Dampness

All of these

Absence of sunlight

Presence of sap

16. A heavy stone is suitable for

Roads

Rubble masonry

Arches

Retaining walls

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

Quartzite

Marble

Slate

Limestone

18. 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

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

All of these

Amosite asbestos

Anthophylite asbestos

Actinolite asbestos

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

Zigzag bond

Single Flemish bond

English bond

Double Flemish bond

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21. Seasoning of timber is done for

None to these

Decreasing moisture content

Increasing strength of timber

Increasing moisture content

22. 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)

(B) Are affected by moisture

(A) Split easily

23. Lacquer paints

Are generally applied on structural steel

All of these

Are less durable as compared to enamel paints

Consist of resin and nitro-cellulose

24. 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

It possesses less compressive strength

All of these

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

Carbon

Phosphorus

Sulphur

Silicon

26. Durability of building stone is affected by its

Texture

Resistance to atmosphere

All the above

Chemical composition

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

Of good plasticity

Of high degree of tenacity

Sufficiently pure

All of these

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

Iron

Manganese

Carbon

Sulphur

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

Oil varnish

Spirit varnish

Turpentine varnish

Water varnish

30. Quick lime (or caustic lime)

All of these

Has great affinity to moisture

Is amorphous

Is obtained by the calcination of pure lime stone

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

Dressing of stones

Quarrying of stones

Blasting of stones

Seasoning of stones

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

Polypropylene

Polyvinylchloride

Polystyrene

All of these

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

7.0 N/mm²

3.5 N/mm²

10.5 N/mm²

14.0 N/mm²

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

10 %

15 %

25 %

20 %

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

Iron ore, coal and lime stone

Iron ore, coal and sulphur

Iron ore, carbon and lime stone

Iron ore, carbon and sulphur

36. Percentage of carbon content in mild steel is

Between 0.25 and 0.7

Less than 0.25

Greater than 1.5

Between 0.7 and 1.5

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

Tensile strength of cement

Soundness of cement

Setting time of cement

compressive strength of cement

38. For melting one tonne of cast iron

All of these

700 m^3 air is required

20 kg limestone is required

One quintal coke is required

39. Glazing is used to make earthenware

Hard

Porous

Impervious

Soft

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

None of these

1.5 kg

2.2 kg

3.2 kg

Building Materials MCQs Set-9

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