Building Materials MCQs Set-9

Page 1 of 4

1. Seasoning of timber is done for

None to these

Increasing moisture content

Decreasing moisture content

Increasing strength of timber

2. Granite is not suitable for ordinary building purpose because

It is not a fireproof material

It is costly

It cannot be polished

It has less crushing strength

3. 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

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

70 to 80 %

5 to 10 %

50 to 60 %

20 to 30 %

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

Tri-calcium aluminate

Tri-calcium silicate

Tetra-calcium alumino-ferrite

Di-calcium silicate

6. Percentage of carbon content in mild steel is

Less than 0.25

Greater than 1.5

Between 0.7 and 1.5

Between 0.25 and 0.7

7. Stainless steel contains

18% of chromium and 8% nickel

12% of chromium and 36% of nickel

8% of chromium and 18% of nickel

36% of chromium and 12% of nickel

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

Dressing of stones

Seasoning of stones

Blasting of stones

Quarrying of stones

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

Amosite asbestos

Actinolite asbestos

Anthophylite asbestos

All of these

10. 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

Page 2 of 4

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

Carbon

Manganese

Sulphur

Iron

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

Phosphorus

Sulphur

Silicon

Carbon

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

Iron ore, coal and sulphur

Iron ore, coal and lime stone

Iron ore, carbon and lime stone

Iron ore, carbon and sulphur

14. Glazing is used to make earthenware

Soft

Porous

Hard

Impervious

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

Limestone

Slate

Marble

Quartzite

16. The slump recommended for mass concrete is about

50 mm to 100 mm

25 mm to 50 mm

100 mm to 125 mm

125 mm to 150 mm

17. A heavy stone is suitable for

Rubble masonry

Arches

Roads

Retaining walls

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

10.5 N/mm²

7.0 N/mm²

3.5 N/mm²

14.0 N/mm²

19. Quick lime (or caustic lime)

All of these

Is amorphous

Has great affinity to moisture

Is obtained by the calcination of pure lime stone

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

Polyvinylchloride

Polypropylene

Polystyrene

All of these

Page 3 of 4

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

All of these

Sufficiently pure

Of good plasticity

Of high degree of tenacity

22. For melting one tonne of cast iron

All of these

20 kg limestone is required

One quintal coke is required

700 m^3 air is required

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

Di-calcium silicate

Tri-calcium silicate

Tri-calcium aluminate

Gypsum

24. Lacquer paints

Are generally applied on structural steel

Consist of resin and nitro-cellulose

Are less durable as compared to enamel paints

All of these

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

Tri-calcium aluminate

All of these

Di-calcium silicate

Tri-calcium silicate

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

Manganese

Chromium

Vanadium

Nickel

27. Durability of building stone is affected by its

Texture

Resistance to atmosphere

All the above

Chemical composition

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

Queen closer

Stretchers

Brick bats

Headers

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

(C) Both (A) and (B)

(A) Split easily

None of these

(B) Are affected by moisture

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

20 %

15 %

25 %

10 %

Page 4 of 4

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

Turpentine varnish

Spirit varnish

Water varnish

Oil varnish

32. The hardest rock is

Quartz

Diamond

Talc

Marble

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

Setting time of cement

compressive strength of cement

Soundness of cement

Tensile strength of cement

34. The commonly used lime in white washing, is

Quick lime

Fat lime

White lime

Hydraulic lime

35. Plywood is made from

Common timber

Teak wood only

Asbestos sheets

Bamboo fibre

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

3.2 kg

None of these

1.5 kg

2.2 kg

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

Cast steel

Bessemer steel

Mild steel

Stainless steel

38. Excess of silica in brick earth results in

Loss of cohesion

Enhancing the impermeability of bricks

None of these

Cracking and warping of bricks

39. 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

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

Double Flemish bond

English bond

Single Flemish bond

Zigzag bond

Building Materials MCQs Set-9

Related

Leave a ReplyCancel reply

Secured Payments

Protection

Building Materials MCQs Set-9

Share this Now with Friends:

Related

Leave a ReplyCancel reply

Secured Payments

Protection