Building Materials MCQs Set-9

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

Soundness of cement

Tensile strength of cement

Setting time of cement

compressive strength of cement

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

Amosite asbestos

Anthophylite asbestos

Actinolite asbestos

All of these

3. The commonly used lime in white washing, is

Quick lime

White lime

Hydraulic lime

Fat lime

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

Bessemer steel

Stainless steel

Cast steel

Mild steel

5. Stainless steel contains

18% of chromium and 8% nickel

12% of chromium and 36% of nickel

36% of chromium and 12% of nickel

8% of chromium and 18% of nickel

6. The hardest rock is

Quartz

Talc

Marble

Diamond

7. Lacquer paints

All of these

Consist of resin and nitro-cellulose

Are generally applied on structural steel

Are less durable as compared to enamel paints

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

None of these

3.2 kg

1.5 kg

2.2 kg

9. Glazing is used to make earthenware

Hard

Soft

Impervious

Porous

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

Of good plasticity

All of these

Sufficiently pure

Of high degree of tenacity

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11. Granite is not suitable for ordinary building purpose because

It is not a fireproof material

It is costly

It has less crushing strength

It cannot be polished

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

Polystyrene

Polyvinylchloride

Polypropylene

All of these

13. A heavy stone is suitable for

Rubble masonry

Roads

Retaining walls

Arches

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

Presence of sap

All of these

Dampness

Absence of sunlight

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

Chromium

Vanadium

Manganese

Nickel

16. The slump recommended for mass concrete is about

25 mm to 50 mm

125 mm to 150 mm

50 mm to 100 mm

100 mm to 125 mm

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

Stretchers

Brick bats

Queen closer

Headers

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

All of these

Tri-calcium silicate

Di-calcium silicate

Tri-calcium aluminate

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

14.0 N/mm²

10.5 N/mm²

7.0 N/mm²

3.5 N/mm²

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

Di-calcium silicate

Tetra-calcium alumino-ferrite

Tri-calcium aluminate

Tri-calcium silicate

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

Grey or foundry pig

Mottled pig

White or forge pig

Bessemer pig

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

Carbon

Sulphur

Silicon

Phosphorus

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

Quartzite

Limestone

Marble

Slate

24. 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

25. Quick lime (or caustic lime)

Has great affinity to moisture

Is amorphous

All of these

Is obtained by the calcination of pure lime stone

26. For melting one tonne of cast iron

All of these

One quintal coke is required

700 m^3 air is required

20 kg limestone is required

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

Turpentine varnish

Oil varnish

Water varnish

Spirit varnish

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

Its final setting time is about 10 hours

All of these

Its initial setting time is about one hour

It possesses less compressive strength

29. Durability of building stone is affected by its

Resistance to atmosphere

Chemical composition

All the above

Texture

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

5 to 10 %

70 to 80 %

50 to 60 %

20 to 30 %

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

Zigzag bond

Double Flemish bond

Single Flemish bond

English bond

32. Excess of silica in brick earth results in

None of these

Loss of cohesion

Enhancing the impermeability of bricks

Cracking and warping of bricks

33. Plywood is made from

Common timber

Teak wood only

Asbestos sheets

Bamboo fibre

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

Tri-calcium silicate

Tri-calcium aluminate

Di-calcium silicate

Gypsum

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

Manganese

Sulphur

Iron

Carbon

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

15 %

10 %

25 %

20 %

37. Seasoning of timber is done for

None to these

Decreasing moisture content

Increasing moisture content

Increasing strength of timber

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

(A) Split easily

(C) Both (A) and (B)

(B) Are affected by moisture

None of these

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

Dressing of stones

Blasting of stones

Seasoning of stones

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

Iron ore, carbon and lime stone

Iron ore, carbon and sulphur

Iron ore, coal and lime stone

Iron ore, coal and sulphur

Building Materials MCQs Set-9

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