Building Materials MCQs Set-9

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1. Glazing is used to make earthenware

Impervious

Porous

Soft

Hard

2. Stainless steel contains

12% of chromium and 36% of nickel

18% of chromium and 8% nickel

8% of chromium and 18% of nickel

36% of chromium and 12% of nickel

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

7.0 N/mm²

14.0 N/mm²

3.5 N/mm²

10.5 N/mm²

4. 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

All of these

It possesses less compressive strength

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

15 %

10 %

25 %

20 %

6. 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

Dressing of stones

Blasting of stones

7. Plywood is made from

Teak wood only

Asbestos sheets

Bamboo fibre

Common timber

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

50 to 60 %

5 to 10 %

70 to 80 %

20 to 30 %

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

Sufficiently pure

All of these

Of good plasticity

Of high degree of tenacity

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

2.2 kg

3.2 kg

1.5 kg

None of these

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11. The hardest rock is

Talc

Marble

Diamond

Quartz

12. The commonly used lime in white washing, is

Hydraulic lime

Quick lime

White lime

Fat lime

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

Di-calcium silicate

Tri-calcium silicate

All of these

Tri-calcium aluminate

14. Lacquer paints

All of these

Are less durable as compared to enamel paints

Are generally applied on structural steel

Consist of resin and nitro-cellulose

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

Limestone

Quartzite

Slate

Marble

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

Presence of sap

Absence of sunlight

Dampness

All of these

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

Mild steel

Cast steel

Bessemer steel

Stainless steel

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

Di-calcium silicate

Tetra-calcium alumino-ferrite

Tri-calcium aluminate

Tri-calcium silicate

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

Phosphorus

Silicon

Carbon

Sulphur

20. Granite is not suitable for ordinary building purpose because

It has less crushing strength

It is costly

It cannot be polished

It is not a fireproof material

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

Soundness of cement

Tensile strength of cement

Setting time of cement

compressive strength of cement

22. For melting one tonne of cast iron

One quintal coke is required

20 kg limestone is required

700 m^3 air is required

All of these

23. 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 sulphur

Iron ore, carbon and sulphur

Iron ore, coal and lime stone

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

(A) Split easily

(B) Are affected by moisture

None of these

(C) Both (A) and (B)

25. Seasoning of timber is done for

Decreasing moisture content

Increasing moisture content

None to these

Increasing strength of timber

26. Percentage of carbon content in mild steel is

Less than 0.25

Greater than 1.5

Between 0.25 and 0.7

Between 0.7 and 1.5

27. Excess of silica in brick earth results in

None of these

Cracking and warping of bricks

Enhancing the impermeability of bricks

Loss of cohesion

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

Nickel

Chromium

Manganese

Vanadium

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

Headers

Stretchers

Brick bats

Queen closer

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

All of these

Polypropylene

Polyvinylchloride

Polystyrene

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31. 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

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

Iron

Sulphur

Manganese

Carbon

33. A heavy stone is suitable for

Retaining walls

Arches

Roads

Rubble masonry

34. Quick lime (or caustic lime)

All of these

Is obtained by the calcination of pure lime stone

Has great affinity to moisture

Is amorphous

35. Durability of building stone is affected by its

Chemical composition

Resistance to atmosphere

Texture

All the above

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

Di-calcium silicate

Tri-calcium aluminate

Tri-calcium silicate

Gypsum

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

Spirit varnish

Turpentine varnish

Oil varnish

Water varnish

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

Mottled pig

White or forge pig

Bessemer pig

Grey or foundry pig

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

All of these

Anthophylite asbestos

Amosite asbestos

Actinolite asbestos

40. The slump recommended for mass concrete is about

125 mm to 150 mm

100 mm to 125 mm

25 mm to 50 mm

50 mm to 100 mm

Building Materials MCQs Set-9

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