Building Material MCQs Set-6

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1. Soundness of cement is tested by

None of these

Le-chatelier apparatus

Vicat's apparatus

Compressive strength testing apparatus

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

Greater than 1

Equal to 1

Less than 1

Less than 1 in beams but greater than 1 in channels

3. Hydraulic lime is obtained by

Oil, wax and resin

Synthetic resin and spirit

Resin, oil and turpentine

Spirit, oil and wax

4. For sanitary pipes and chemical stonewares,

Lead glazing is used

None of these

Opaque glazing is used

Salt glazing is used

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

Hypabyssal rocks

Volcanic rocks

Igneous rocks

Plutonic rocks

6. 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

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

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

7. Cast iron contains carbon approximately

None of these

1.5% to 5.5%

0.250 %

0.05% to 1.75%

8. First class timber has an average life of

More than 10 years

1 to 5 years

5 to 10 years

Less than one year

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

Alumina and iron

Lime stone and alumina

Silica and alkalies

Alkalies and magnesium

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

Single Flemish bond

Double Flemish bond

Zigzag bond

English bond

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11. Asbestos

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

All of these

Is a natural fibrous mineral substance

Contains iron oxide and alumina

12. The main function of alumina in brick earth is

To prevent shrinkage

To impart plasticity

To make the brick durable

To make the brick impermeable

13. A queen closer is a

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

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

14. The most commonly used retarder in cement is

Calcium carbonate

None of the above

Calcium chloride

Gypsum

15. 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

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

Clay

Feldspar

Quartz

All of these

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

30, 70

25, 75

All of these

35, 65

18. The main ingredients of Portland cement are

Lime and alumina

Lime and iron

Silica and alumina

Lime and silica

19. Cast iron

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

All of these

Is manufactured in required shapes

Is obtained by purifying pig iron

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

Quartzite

Sand stone

Lime stone

Granite

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

Structure

Cleavage

Texture

Fracture

22. Bitumen may be dissolved in

Carbon disulphide

Water

Sodium chloride

Carbondioxide

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

Gypsum

Calcium chloride

None of the above

Calcium carbonate

24. Which of the following trees yields hard wood?

Pine

Chir

Deodar

Shishum

25. Blister steel

Can be easily welded

All of these

Is full of fissures and cavities

Is obtained by cementation process

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

Magnesia

Alumina

Silica

Iron

27. 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

Lime

Iron-oxide

Magnesia

28. Gypsum is a

Mechanically formed sedimentary rock

Igneous rock

Chemically precipitated sedimentary rock

Metamorphic rock

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

Biotite

Hornblende

All of these

Augite

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

70.6 mm

150 mm

100 mm

50 mm

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31. After storage, the strength of cement

Decreases

Remains same

May increase or decrease

Increases

32. Which of the following is a rock?

Quartz

None of these

Gypsum

Mica

33. A bull nose brick is not used for

Rounding off sharp corners

Pillars

Decoration purpose

Arches

34. Seasoning of timber is done

To make it water proof

To paint its surface

To increase its temperature

To remove water

35. Strength of cement concrete primarily depends upon

Quantity of cement

Quantity of aggregate

Water-cement ratio

Quality of water

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

All of these

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

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

160 N/mm²

260 N/mm²

520 N/mm²

420 N/mm²

38. Non acid-resistant asbestos is:

Amosite asbestos

Chrysotile asbestos

None of these

Tremolite asbestos

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

1 : 4

1 : 2

1 : 6

1 : 8

40. Gypsum consists of

H₂S and CO₂

CO₂ and calcium

CaSO4 and H₂O

Lime and H₂O

Building Material MCQs Set-6

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Building Material MCQs Set-6

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