Building Materials MCQs Set-9

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

Queen closer

Headers

Stretchers

Brick bats

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

Of high degree of tenacity

All of these

Sufficiently pure

Of good plasticity

3. 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

4. Plywood is made from

Bamboo fibre

Teak wood only

Common timber

Asbestos sheets

5. 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

6. 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

7. The hardest rock is

Diamond

Quartz

Marble

Talc

8. 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

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

10.5 N/mm²

14.0 N/mm²

3.5 N/mm²

7.0 N/mm²

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

Tetra-calcium alumino-ferrite

Di-calcium silicate

Tri-calcium aluminate

Tri-calcium silicate

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11. The slump recommended for mass concrete is about

50 mm to 100 mm

100 mm to 125 mm

125 mm to 150 mm

25 mm to 50 mm

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

25 %

20 %

15 %

10 %

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

Oil varnish

Spirit varnish

Water varnish

Turpentine varnish

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

Iron

Manganese

Sulphur

Carbon

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

Polyvinylchloride

Polypropylene

All of these

Polystyrene

16. A heavy stone is suitable for

Rubble masonry

Retaining walls

Arches

Roads

17. Durability of building stone is affected by its

Texture

Resistance to atmosphere

Chemical composition

All the above

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

Amosite asbestos

Anthophylite asbestos

Actinolite asbestos

All of these

19. Seasoning of timber is done for

Decreasing moisture content

Increasing strength of timber

Increasing moisture content

None to these

20. Glazing is used to make earthenware

Impervious

Porous

Soft

Hard

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21. Lacquer paints

All of these

Are generally applied on structural steel

Are less durable as compared to enamel paints

Consist of resin and nitro-cellulose

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

Mottled pig

Grey or foundry pig

White or forge pig

Bessemer pig

23. Stainless steel contains

18% of chromium and 8% nickel

36% of chromium and 12% of nickel

8% of chromium and 18% of nickel

12% of chromium and 36% of nickel

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

Cast steel

Bessemer steel

Mild steel

Stainless steel

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

Setting time of cement

Tensile strength of cement

Soundness of cement

compressive strength of cement

26. 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

27. 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

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

Tri-calcium silicate

Tri-calcium aluminate

Gypsum

Di-calcium silicate

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

Vanadium

Manganese

Chromium

Nickel

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

20 to 30 %

50 to 60 %

70 to 80 %

5 to 10 %

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

Limestone

Quartzite

Slate

Marble

32. Granite is not suitable for ordinary building purpose because

It cannot be polished

It is costly

It is not a fireproof material

It has less crushing strength

33. Quick lime (or caustic lime)

All of these

Is amorphous

Is obtained by the calcination of pure lime stone

Has great affinity to moisture

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

Phosphorus

Sulphur

Carbon

Silicon

35. Excess of silica in brick earth results in

Cracking and warping of bricks

Loss of cohesion

Enhancing the impermeability of bricks

None of these

36. The commonly used lime in white washing, is

White lime

Hydraulic lime

Quick lime

Fat lime

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

Tri-calcium silicate

Di-calcium silicate

Tri-calcium aluminate

All of these

38. 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

39. 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

40. 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

Building Materials MCQs Set-9

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