Building Material MCQs Set-6

Page 1 of 4

1. 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

2. Strength of cement concrete primarily depends upon

Quantity of cement

Water-cement ratio

Quality of water

Quantity of aggregate

3. First class timber has an average life of

1 to 5 years

More than 10 years

5 to 10 years

Less than one year

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

160 N/mm²

420 N/mm²

260 N/mm²

520 N/mm²

5. 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

Alumina and iron

Silica and alkalies

Alkalies and magnesium

6. Gypsum consists of

CaSO4 and H₂O

Lime and H₂O

H₂S and CO₂

CO₂ and calcium

7. Gypsum is a

Igneous rock

Mechanically formed sedimentary rock

Chemically precipitated sedimentary rock

Metamorphic rock

8. Pick up the correct statement from the following:

All of these

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

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

9. For sanitary pipes and chemical stonewares,

Lead glazing is used

None of these

Salt glazing is used

Opaque glazing is used

10. A queen closer is a

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

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

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11. After storage, the strength of cement

May increase or decrease

Increases

Decreases

Remains same

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

70.6 mm

100 mm

150 mm

50 mm

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

All of these

Augite

Hornblende

Biotite

14. The most commonly used retarder in cement is

Calcium chloride

None of the above

Gypsum

Calcium carbonate

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

30, 70

35, 65

All of these

25, 75

16. Asbestos

Is a natural fibrous mineral substance

Contains iron oxide and alumina

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

All of these

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

Structure

Cleavage

Fracture

Texture

18. Non acid-resistant asbestos is:

Chrysotile asbestos

Amosite asbestos

None of these

Tremolite asbestos

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

Iron-oxide

Magnesia

Alumina

Lime

20. 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

Page 3 of 4

21. Cast iron

Is obtained by purifying pig iron

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

All of these

Is manufactured in required shapes

22. Which of the following is a rock?

None of these

Mica

Gypsum

Quartz

23. Soundness of cement is tested by

Compressive strength testing apparatus

Vicat's apparatus

Le-chatelier apparatus

None of these

24. Blister steel

Is obtained by cementation process

Is full of fissures and cavities

Can be easily welded

All of these

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

Igneous rocks

Hypabyssal rocks

Volcanic rocks

Plutonic rocks

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

Single Flemish bond

Double Flemish bond

English bond

Zigzag bond

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

Clay

Quartz

All of these

Feldspar

28. Cast iron contains carbon approximately

None of these

1.5% to 5.5%

0.250 %

0.05% to 1.75%

29. A bull nose brick is not used for

Pillars

Decoration purpose

Arches

Rounding off sharp corners

30. Seasoning of timber is done

To remove water

To make it water proof

To increase its temperature

To paint its surface

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

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

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

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

1 : 6

1 : 8

1 : 4

1 : 2

33. The main ingredients of Portland cement are

Lime and silica

Lime and alumina

Lime and iron

Silica and alumina

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

Silica

Magnesia

Iron

Alumina

35. Bitumen may be dissolved in

Sodium chloride

Water

Carbondioxide

Carbon disulphide

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

Granite

Quartzite

Lime stone

Sand stone

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

Equal to 1

Greater than 1

Less than 1

Less than 1 in beams but greater than 1 in channels

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

Gypsum

Calcium carbonate

None of the above

Calcium chloride

39. Which of the following trees yields hard wood?

Pine

Shishum

Chir

Deodar

40. Hydraulic lime is obtained by

Resin, oil and turpentine

Synthetic resin and spirit

Oil, wax and resin

Spirit, oil and wax

Building Material MCQs Set-6

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