Building Materials MCQs Set-9

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

Tensile strength of cement

compressive strength of cement

Soundness of cement

Setting time of cement

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

Seasoning of stones

Quarrying of stones

Dressing of stones

Blasting of stones

3. The commonly used lime in white washing, is

Fat lime

Quick lime

White lime

Hydraulic lime

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

Its initial setting time is about one hour

All of these

It possesses less compressive strength

Its final setting time is about 10 hours

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

Quartzite

Slate

Marble

Limestone

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

Polystyrene

All of these

Polyvinylchloride

Polypropylene

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

White or forge pig

Grey or foundry pig

Mottled pig

Bessemer pig

8. Stainless steel contains

18% of chromium and 8% nickel

8% of chromium and 18% of nickel

36% of chromium and 12% of nickel

12% of chromium and 36% of nickel

9. Quick lime (or caustic lime)

Has great affinity to moisture

All of these

Is amorphous

Is obtained by the calcination of pure lime stone

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

3.5 N/mm²

14.0 N/mm²

7.0 N/mm²

10.5 N/mm²

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11. Excess of silica in brick earth results in

Enhancing the impermeability of bricks

None of these

Cracking and warping of bricks

Loss of cohesion

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

Iron ore, carbon and sulphur

Iron ore, carbon and lime stone

Iron ore, coal and lime stone

Iron ore, coal and sulphur

13. Granite is not suitable for ordinary building purpose because

It is costly

It is not a fireproof material

It has less crushing strength

It cannot be polished

14. Percentage of carbon content in mild steel is

Between 0.7 and 1.5

Less than 0.25

Greater than 1.5

Between 0.25 and 0.7

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

Headers

Queen closer

Brick bats

Stretchers

16. For melting one tonne of cast iron

All of these

One quintal coke is required

20 kg limestone is required

700 m^3 air is required

17. Lacquer paints

Are generally applied on structural steel

All of these

Consist of resin and nitro-cellulose

Are less durable as compared to enamel paints

18. Plywood is made from

Common timber

Teak wood only

Bamboo fibre

Asbestos sheets

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

15 %

10 %

25 %

20 %

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

Sulphur

Phosphorus

Silicon

Carbon

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

Cast steel

Bessemer steel

Mild steel

Stainless steel

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. The slump recommended for mass concrete is about

25 mm to 50 mm

50 mm to 100 mm

100 mm to 125 mm

125 mm to 150 mm

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

Absence of sunlight

Dampness

All of these

Presence of sap

25. Seasoning of timber is done for

Increasing moisture content

Decreasing moisture content

Increasing strength of timber

None to these

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

Tetra-calcium alumino-ferrite

Di-calcium silicate

Tri-calcium silicate

Tri-calcium aluminate

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

All of these

Of high degree of tenacity

Sufficiently pure

Of good plasticity

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

Chromium

Manganese

Vanadium

Nickel

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

Spirit varnish

Turpentine varnish

Oil varnish

Water varnish

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

Anthophylite asbestos

Actinolite asbestos

Amosite asbestos

All of these

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

20 to 30 %

70 to 80 %

5 to 10 %

50 to 60 %

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

Tri-calcium aluminate

Tri-calcium silicate

All of these

Di-calcium silicate

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

None of these

(A) Split easily

(C) Both (A) and (B)

(B) Are affected by moisture

34. A heavy stone is suitable for

Arches

Roads

Rubble masonry

Retaining walls

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

Tri-calcium aluminate

Di-calcium silicate

Gypsum

Tri-calcium silicate

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

English bond

Single Flemish bond

Zigzag bond

Double Flemish bond

37. Durability of building stone is affected by its

Chemical composition

All the above

Resistance to atmosphere

Texture

38. The hardest rock is

Diamond

Quartz

Talc

Marble

39. Glazing is used to make earthenware

Soft

Impervious

Hard

Porous

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

Iron

Carbon

Sulphur

Manganese

Building Materials MCQs Set-9

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