Building Materials MCQs Set-9

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1. Plywood is made from

Teak wood only

Asbestos sheets

Bamboo fibre

Common timber

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

Stretchers

Queen closer

Headers

Brick bats

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

1.5 kg

3.2 kg

2.2 kg

None of these

4. Lacquer paints

All of these

Are less durable as compared to enamel paints

Consist of resin and nitro-cellulose

Are generally applied on structural steel

5. Durability of building stone is affected by its

Resistance to atmosphere

Chemical composition

All the above

Texture

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

All of these

Anthophylite asbestos

Amosite asbestos

Actinolite asbestos

7. 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

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

Tri-calcium silicate

All of these

Di-calcium silicate

Tri-calcium aluminate

9. Granite is not suitable for ordinary building purpose because

It is not a fireproof material

It has less crushing strength

It is costly

It cannot be polished

10. A heavy stone is suitable for

Retaining walls

Roads

Rubble masonry

Arches

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11. The hardest rock is

Diamond

Marble

Quartz

Talc

12. 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

13. Quick lime (or caustic lime)

Has great affinity to moisture

Is obtained by the calcination of pure lime stone

Is amorphous

All of these

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

Bessemer pig

Mottled pig

Grey or foundry pig

White or forge pig

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

Oil varnish

Spirit varnish

Turpentine varnish

Water varnish

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

Iron

Carbon

Manganese

Sulphur

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

(C) Both (A) and (B)

(B) Are affected by moisture

(A) Split easily

None of these

18. For melting one tonne of cast iron

20 kg limestone is required

One quintal coke is required

All of these

700 m^3 air is required

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

Vanadium

Chromium

Nickel

Manganese

20. Excess of silica in brick earth results in

Enhancing the impermeability of bricks

Loss of cohesion

Cracking and warping of bricks

None of these

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

Carbon

Sulphur

Phosphorus

Silicon

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

3.5 N/mm²

14.0 N/mm²

10.5 N/mm²

7.0 N/mm²

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

Setting time of cement

Soundness of cement

Tensile strength of cement

compressive strength of cement

24. The slump recommended for mass concrete is about

25 mm to 50 mm

100 mm to 125 mm

125 mm to 150 mm

50 mm to 100 mm

25. 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, carbon and sulphur

Iron ore, coal and sulphur

26. Seasoning of timber is done for

Increasing strength of timber

Decreasing moisture content

Increasing moisture content

None to these

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

Stainless steel

Mild steel

Cast steel

Bessemer steel

28. Percentage of carbon content in mild steel is

Greater than 1.5

Less than 0.25

Between 0.7 and 1.5

Between 0.25 and 0.7

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

Polypropylene

Polystyrene

All of these

Polyvinylchloride

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

Di-calcium silicate

Tri-calcium silicate

Tetra-calcium alumino-ferrite

Tri-calcium aluminate

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31. The commonly used lime in white washing, is

Quick lime

Fat lime

Hydraulic lime

White lime

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

Single Flemish bond

English bond

Zigzag bond

Double Flemish bond

33. Glazing is used to make earthenware

Porous

Impervious

Hard

Soft

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

Limestone

Marble

Quartzite

Slate

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

15 %

25 %

10 %

20 %

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

All of these

It possesses less compressive strength

Its final setting time is about 10 hours

Its initial setting time is about one hour

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

Presence of sap

Dampness

All of these

Absence of sunlight

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

Sufficiently pure

Of high degree of tenacity

All of these

Of good plasticity

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

70 to 80 %

5 to 10 %

50 to 60 %

20 to 30 %

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

Gypsum

Tri-calcium aluminate

Di-calcium silicate

Tri-calcium silicate

Building Materials MCQs Set-9

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