Building Material MCQs Set-6

Page 1 of 4

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

Double Flemish bond

Zigzag bond

English bond

Single Flemish bond

2. Which of the following trees yields hard wood?

Shishum

Pine

Chir

Deodar

3. The main ingredients of Portland cement are

Lime and alumina

Silica and alumina

Lime and silica

Lime and iron

4. Cast iron

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

Is manufactured in required shapes

All of these

Is obtained by purifying pig iron

5. For sanitary pipes and chemical stonewares,

Opaque glazing is used

Lead glazing is used

None of these

Salt glazing is used

6. The main function of alumina in brick earth is

To make the brick impermeable

To impart plasticity

To prevent shrinkage

To make the brick durable

7. Which of the following is a rock?

Gypsum

None of these

Quartz

Mica

8. Cast iron contains carbon approximately

1.5% to 5.5%

0.05% to 1.75%

None of these

0.250 %

9. 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

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

Lime

Iron-oxide

Alumina

Magnesia

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

Sand stone

Lime stone

Granite

Quartzite

12. Gypsum is a

Mechanically formed sedimentary rock

Metamorphic rock

Igneous rock

Chemically precipitated sedimentary rock

13. First class timber has an average life of

More than 10 years

1 to 5 years

5 to 10 years

Less than one year

14. Bitumen may be dissolved in

Water

Carbon disulphide

Carbondioxide

Sodium chloride

15. Gypsum consists of

Lime and H₂O

CO₂ and calcium

H₂S and CO₂

CaSO4 and H₂O

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

Structure

Texture

Cleavage

Fracture

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

Perpendicular to the direction of bedding planes

At 60° to the direction of bedding planes

Along the direction of bedding planes

At 45° to the direction of bedding planes

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

Gypsum

Calcium carbonate

None of the above

Calcium chloride

19. Pick up the correct statement from the following:

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

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

All of these

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

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

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

Page 3 of 4

21. Blister steel

Is obtained by cementation process

Can be easily welded

All of these

Is full of fissures and cavities

22. A queen closer is a

Brick laid with its length 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

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

23. Hydraulic lime is obtained by

Resin, oil and turpentine

Synthetic resin and spirit

Spirit, oil and wax

Oil, wax and resin

24. Asbestos

Contains iron oxide and alumina

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

Is a natural fibrous mineral substance

All of these

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

Silica

Iron

Magnesia

Alumina

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

Greater than 1

Less than 1

Equal to 1

Less than 1 in beams but greater than 1 in channels

27. The most commonly used retarder in cement is

Gypsum

Calcium chloride

Calcium carbonate

None of the above

28. Soundness of cement is tested by

None of these

Vicat's apparatus

Le-chatelier apparatus

Compressive strength testing apparatus

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

Plutonic rocks

Volcanic rocks

Hypabyssal rocks

Igneous rocks

30. A bull nose brick is not used for

Arches

Pillars

Decoration purpose

Rounding off sharp corners

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

420 N/mm²

160 N/mm²

260 N/mm²

520 N/mm²

32. Seasoning of timber is done

To remove water

To make it water proof

To paint its surface

To increase its temperature

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

1 : 4

1 : 2

1 : 8

1 : 6

34. Strength of cement concrete primarily depends upon

Water-cement ratio

Quality of water

Quantity of cement

Quantity of aggregate

35. Non acid-resistant asbestos is:

None of these

Amosite asbestos

Chrysotile asbestos

Tremolite asbestos

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

30, 70

25, 75

All of these

35, 65

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

Clay

Quartz

Feldspar

All of these

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

Hornblende

Biotite

Augite

All of these

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

100 mm

150 mm

70.6 mm

50 mm

40. After storage, the strength of cement

Remains same

Decreases

Increases

May increase or decrease

Building Material MCQs Set-6

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