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Building Materials
0

Building Materials MCQs Set-9

June 15, 2021

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Page 1 of 4

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

Sulphur

Phosphorus

Carbon

Silicon

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

Limestone

Marble

Quartzite

Slate

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3. For melting one tonne of cast iron

700 m^3 air is required

One quintal coke is required

20 kg limestone is required

All of these

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4. The slump recommended for mass concrete is about

100 mm to 125 mm

25 mm to 50 mm

50 mm to 100 mm

125 mm to 150 mm

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5. Lacquer paints

Are generally applied on structural steel

All of these

Are less durable as compared to enamel paints

Consist of resin and nitro-cellulose

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6. Percentage of carbon content in mild steel is

Greater than 1.5

Less than 0.25

Between 0.25 and 0.7

Between 0.7 and 1.5

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7. Stainless steel contains

8% of chromium and 18% of nickel

12% of chromium and 36% of nickel

36% of chromium and 12% of nickel

18% of chromium and 8% nickel

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8. Glazing is used to make earthenware

Impervious

Hard

Porous

Soft

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9. Plywood is made from

Common timber

Bamboo fibre

Teak wood only

Asbestos sheets

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

Grey or foundry pig

White or forge pig

Bessemer pig

Mottled pig

Page 2 of 4

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11. A heavy stone is suitable for

Arches

Rubble masonry

Retaining walls

Roads

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

Tri-calcium aluminate

Tri-calcium silicate

Di-calcium silicate

All of these

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

Chromium

Nickel

Vanadium

Manganese

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14. 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

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15. The hardest rock is

Quartz

Talc

Diamond

Marble

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

Absence of sunlight

Presence of sap

Dampness

All of these

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

Soundness of cement

Setting time of cement

Tensile strength of cement

compressive strength of cement

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18. 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, coal and lime stone

Iron ore, carbon and sulphur

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

All of these

Anthophylite asbestos

Amosite asbestos

Actinolite asbestos

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

1.5 kg

3.2 kg

None of these

2.2 kg

Page 3 of 4

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21. Durability of building stone is affected by its

Resistance to atmosphere

Chemical composition

All the above

Texture

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

None of these

(B) Are affected by moisture

(A) Split easily

(C) Both (A) and (B)

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23. Quick lime (or caustic lime)

Is obtained by the calcination of pure lime stone

All of these

Has great affinity to moisture

Is amorphous

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

Tri-calcium aluminate

Tetra-calcium alumino-ferrite

Tri-calcium silicate

Di-calcium silicate

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

7.0 N/mm²

3.5 N/mm²

10.5 N/mm²

14.0 N/mm²

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26. Granite is not suitable for ordinary building purpose because

It cannot be polished

It is not a fireproof material

It has less crushing strength

It is costly

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

All of these

Polystyrene

Polypropylene

Polyvinylchloride

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

All of these

Its initial setting time is about one hour

Its final setting time is about 10 hours

It possesses less compressive strength

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29. The commonly used lime in white washing, is

Fat lime

Hydraulic lime

Quick lime

White lime

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30. Excess of silica in brick earth results in

None of these

Cracking and warping of bricks

Loss of cohesion

Enhancing the impermeability of bricks

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

70 to 80 %

20 to 30 %

50 to 60 %

5 to 10 %

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32. Seasoning of timber is done for

Increasing strength of timber

Decreasing moisture content

Increasing moisture content

None to these

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

Sulphur

Manganese

Carbon

Iron

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

Di-calcium silicate

Gypsum

Tri-calcium aluminate

Tri-calcium silicate

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

Zigzag bond

English bond

Double Flemish bond

Single Flemish bond

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

Stretchers

Brick bats

Headers

Queen closer

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

Mild steel

Cast steel

Stainless steel

Bessemer steel

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

10 %

25 %

20 %

15 %

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

Turpentine varnish

Spirit varnish

Oil varnish

Water varnish

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40. 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

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VideRime

A Demrot is the founder of VideRime Online Learning, a leading engineering website. He did his BE Civil and M.Tech Structure from RGPV University, Bhopal and has been working as an Assistant Professor in a reputed college.

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