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Building Materials
0

Building Material MCQs Set-6

June 9, 2021

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Page 1 of 4

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1. Hydraulic lime is obtained by

Spirit, oil and wax

Oil, wax and resin

Resin, oil and turpentine

Synthetic resin and spirit

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

Quartz

Feldspar

Clay

All of these

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3. Which of the following trees yields hard wood?

Deodar

Shishum

Pine

Chir

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4. Non acid-resistant asbestos is:

Amosite asbestos

Tremolite asbestos

None of these

Chrysotile asbestos

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

Quartzite

Lime stone

Sand stone

Granite

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6. Asbestos

All of these

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

Contains iron oxide and alumina

Is a natural fibrous mineral substance

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7. 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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8. 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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9. Seasoning of timber is done

To make it water proof

To increase its temperature

To paint its surface

To remove water

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10. After storage, the strength of cement

May increase or decrease

Decreases

Increases

Remains same

Page 2 of 4

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

Magnesia

Lime

Alumina

Iron-oxide

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12. Bitumen may be dissolved in

Water

Carbondioxide

Carbon disulphide

Sodium chloride

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

Volcanic rocks

Igneous rocks

Plutonic rocks

Hypabyssal rocks

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

1 : 6

1 : 8

1 : 4

1 : 2

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

Silica and alkalies

Alumina and iron

Alkalies and magnesium

Lime stone and alumina

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16. Gypsum is a

Igneous rock

Mechanically formed sedimentary rock

Chemically precipitated sedimentary rock

Metamorphic rock

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17. A queen closer is a

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

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

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

At 45° to the direction of bedding planes

Along the direction of bedding planes

At 60° to the direction of bedding planes

Perpendicular to the direction of bedding planes

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

Hornblende

Augite

All of these

Biotite

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20. The main function of alumina in brick earth is

To impart plasticity

To prevent shrinkage

To make the brick impermeable

To make the brick durable

Page 3 of 4

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21. The main ingredients of Portland cement are

Lime and iron

Lime and alumina

Lime and silica

Silica and alumina

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22. Pick up the correct statement from the following:

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

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

All of these

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

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

Structure

Cleavage

Texture

Fracture

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

Magnesia

Silica

Iron

Alumina

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25. Strength of cement concrete primarily depends upon

Quantity of cement

Quantity of aggregate

Quality of water

Water-cement ratio

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26. Which of the following is a rock?

Gypsum

None of these

Mica

Quartz

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

Gypsum

Calcium chloride

None of the above

Calcium carbonate

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28. For sanitary pipes and chemical stonewares,

None of these

Lead glazing is used

Salt glazing is used

Opaque glazing is used

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29. 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

Equal to 1

Greater than 1

Less than 1

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

260 N/mm²

420 N/mm²

520 N/mm²

160 N/mm²

Page 4 of 4

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31. First class timber has an average life of

More than 10 years

5 to 10 years

1 to 5 years

Less than one year

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

150 mm

100 mm

70.6 mm

50 mm

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33. Blister steel

Is obtained by cementation process

Can be easily welded

Is full of fissures and cavities

All of these

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34. Soundness of cement is tested by

None of these

Vicat's apparatus

Le-chatelier apparatus

Compressive strength testing apparatus

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35. Cast iron

Is manufactured in required shapes

Is obtained by purifying pig iron

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

All of these

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36. Gypsum consists of

Lime and H₂O

CaSO4 and H₂O

H₂S and CO₂

CO₂ and calcium

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37. 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

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

All of these

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38. The most commonly used retarder in cement is

Calcium chloride

None of the above

Calcium carbonate

Gypsum

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39. Cast iron contains carbon approximately

0.05% to 1.75%

0.250 %

None of these

1.5% to 5.5%

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40. A bull nose brick is not used for

Decoration purpose

Rounding off sharp corners

Pillars

Arches

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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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