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Building Materials
0

Building Material MCQs Set-6

June 9, 2021

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25%

Page 1 of 4

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1. Cast iron contains carbon approximately

None of these

1.5% to 5.5%

0.05% to 1.75%

0.250 %

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2. Which of the following trees yields hard wood?

Chir

Pine

Deodar

Shishum

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3. Which of the following is a rock?

Quartz

Mica

None of these

Gypsum

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4. Which one of the following is used for preparing porcelain?

Feldspar

Quartz

Clay

All of these

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5. The ultimate tensile strength of structural mild steel is about

160 N/mm²

420 N/mm²

260 N/mm²

520 N/mm²

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6. Seasoning of timber is done

To make it water proof

To paint its surface

To increase its temperature

To remove water

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7. Bitumen may be dissolved in

Water

Carbon disulphide

Sodium chloride

Carbondioxide

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8. Gypsum consists of

H₂S and CO₂

Lime and H₂O

CO₂ and calcium

CaSO4 and H₂O

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9. Cast iron

All of these

May contain 2 to 5 per cent of carbon with other impurities

Is obtained by purifying pig iron

Is manufactured in required shapes

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10. Soundness of cement is tested by

None of these

Le-chatelier apparatus

Compressive strength testing apparatus

Vicat's apparatus

Page 2 of 4

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11. Strength of cement concrete primarily depends upon

Quality of water

Water-cement ratio

Quantity of cement

Quantity of aggregate

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12. Pick up the correct statement from the following:

Cracked paints may be cured by removing paint and giving a fresh coat of paint

All of these

Crawling paints may be cured by sand preparing the surface and giving a fresh coat with plenty of turps

Blistering may be cured by applying water paint finished with oil paint dried with a little copal varnish

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13. Non acid-resistant asbestos is:

Tremolite asbestos

None of these

Chrysotile asbestos

Amosite asbestos

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14. Which of the following stone is best suited for construction of piers and abutments of a railway bridge?

Quartzite

Sand stone

Granite

Lime stone

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15. Chlorite, a green colour mineral is mainly derived from the decomposition of

Biotite

Hornblende

All of these

Augite

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16. Asbestos

All of these

Is a natural fibrous mineral substance

Is composed of hydrous silicates of calcium and magnesium (CaSiO3, 3MgSiO3)

Contains iron oxide and alumina

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17. The main function of alumina in brick earth is

To make the brick durable

To make the brick impermeable

To prevent shrinkage

To impart plasticity

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18. The proportions of lime and sand in the mortar normally used in brick construction are

1 : 4

1 : 2

1 : 6

1 : 8

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19. Which of the following ingredients of the brick earth enables the brick to retain its shape?

Magnesia

Iron

Alumina

Silica

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20. After storage, the strength of cement

Increases

Decreases

Remains same

May increase or decrease

Page 3 of 4

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21. A queen closer is a

Brick having the same length and depth as the other bricks but half the breadth

Brick laid with its breadth parallel to the face or direction of wall

Brick with half the width at one end and full width at the other

Brick laid with its length parallel to the face or direction of wall

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22. The most common admixture which is used to accelerate the initial set of concrete is

None of the above

Gypsum

Calcium chloride

Calcium carbonate

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23. The type of bond provided in brick masonry for carrying heavy loads is

Zigzag bond

Single Flemish bond

Double Flemish bond

English bond

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24. The percentage of alumina and silica in good fire clay vary respectively is

35, 65

30, 70

All of these

25, 75

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25. When a brick is immersed in water for 24 hours and then dried, if

10 percent surface is covered with grey or white deposits, the brick has slight efflorescence

No grey or white deposits appear on the surface, the brick is free from soluble salts

All of these

50 percent surface is covered with grey or white deposits, the brick has serious efflorescence

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26. Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth?

Lime stone and alumina

Silica and alkalies

Alkalies and magnesium

Alumina and iron

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27. The most commonly used retarder in cement is

None of the above

Calcium carbonate

Calcium chloride

Gypsum

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28. The pressure acting on the stones in stone masonry construction should be

At 60° to the direction of bedding planes

At 45° to the direction of bedding planes

Along the direction of bedding planes

Perpendicular to the direction of bedding planes

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29. Blister steel

Is full of fissures and cavities

Can be easily welded

Is obtained by cementation process

All of these

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30. Pick up the constituent of good brick earth whose excess causes the raw bricks shrink and warp during drying and burning, from the following:

Alumina

Iron-oxide

Lime

Magnesia

Page 4 of 4

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31. First class timber has an average life of

1 to 5 years

5 to 10 years

More than 10 years

Less than one year

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32. Hydraulic lime is obtained by

Synthetic resin and spirit

Spirit, oil and wax

Oil, wax and resin

Resin, oil and turpentine

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33. A bull nose brick is not used for

Rounding off sharp corners

Arches

Pillars

Decoration purpose

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34. For sanitary pipes and chemical stonewares,

Salt glazing is used

Lead glazing is used

None of these

Opaque glazing is used

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35. The ratio of the thickness of web to that of flange of steel rolled structural beams and channels is

Less than 1 in beams but greater than 1 in channels

Less than 1

Equal to 1

Greater than 1

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36. Gypsum is a

Chemically precipitated sedimentary rock

Metamorphic rock

Igneous rock

Mechanically formed sedimentary rock

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37. The main ingredients of Portland cement are

Lime and iron

Silica and alumina

Lime and silica

Lime and alumina

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38. The tendency of a stone is, to split along:

Structure

Texture

Cleavage

Fracture

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39. The rocks which are formed due to cooling of magma at a relatively shallow depth from the earth's surface are called

Volcanic rocks

Hypabyssal rocks

Plutonic rocks

Igneous rocks

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40. For testing compressive strength of cement, the size of cube used is

100 mm

150 mm

50 mm

70.6 mm

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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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