Building Material MCQs Set-6

Page 1 of 4

1. Cast iron

Is obtained by purifying pig iron

All of these

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

Is manufactured in required shapes

2. A bull nose brick is not used for

Arches

Decoration purpose

Pillars

Rounding off sharp corners

3. For sanitary pipes and chemical stonewares,

Lead glazing is used

Salt glazing is used

Opaque glazing is used

None of these

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

Less than 1

Equal to 1

Greater than 1

Less than 1 in beams but greater than 1 in channels

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

1 : 8

1 : 4

1 : 6

1 : 2

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

Quartz

Feldspar

All of these

Clay

7. 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

Lime

Alumina

Magnesia

8. 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 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

9. The main function of alumina in brick earth is

To make the brick impermeable

To prevent shrinkage

To impart plasticity

To make the brick durable

10. 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

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

Cleavage

Texture

Structure

Fracture

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

English bond

Zigzag bond

Double Flemish bond

Single Flemish bond

13. 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

Alkalies and magnesium

Silica and alkalies

Alumina and iron

14. The most commonly used retarder in cement is

None of the above

Gypsum

Calcium chloride

Calcium carbonate

15. Seasoning of timber is done

To remove water

To paint its surface

To make it water proof

To increase its temperature

16. Gypsum consists of

H₂S and CO₂

Lime and H₂O

CaSO4 and H₂O

CO₂ and calcium

17. 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

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

Igneous rocks

Volcanic rocks

Hypabyssal rocks

Plutonic rocks

19. Strength of cement concrete primarily depends upon

Water-cement ratio

Quality of water

Quantity of aggregate

Quantity of cement

20. Non acid-resistant asbestos is:

Chrysotile asbestos

None of these

Tremolite asbestos

Amosite asbestos

Page 3 of 4

21. Cast iron contains carbon approximately

0.250 %

0.05% to 1.75%

1.5% to 5.5%

None of these

22. Hydraulic lime is obtained by

Synthetic resin and spirit

Spirit, oil and wax

Resin, oil and turpentine

Oil, wax and resin

23. After storage, the strength of cement

Decreases

Increases

May increase or decrease

Remains same

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

Calcium chloride

Calcium carbonate

None of the above

Gypsum

25. Gypsum is a

Metamorphic rock

Mechanically formed sedimentary rock

Igneous rock

Chemically precipitated sedimentary rock

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

Iron

Magnesia

Silica

Alumina

27. Bitumen may be dissolved in

Carbondioxide

Sodium chloride

Water

Carbon disulphide

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

100 mm

150 mm

70.6 mm

50 mm

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

Hornblende

Biotite

All of these

Augite

30. Which of the following is a rock?

Gypsum

Mica

None of these

Quartz

Page 4 of 4

31. First class timber has an average life of

5 to 10 years

More than 10 years

1 to 5 years

Less than one year

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

Lime stone

Granite

Sand stone

Quartzite

33. Which of the following trees yields hard wood?

Shishum

Pine

Chir

Deodar

34. 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

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

35. Soundness of cement is tested by

Vicat's apparatus

None of these

Compressive strength testing apparatus

Le-chatelier apparatus

36. Blister steel

Is obtained by cementation process

Is full of fissures and cavities

Can be easily welded

All of these

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

260 N/mm²

420 N/mm²

520 N/mm²

160 N/mm²

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

Perpendicular to the direction of bedding planes

At 45° to the direction of bedding planes

Along the direction of bedding planes

At 60° to the direction of bedding planes

39. The main ingredients of Portland cement are

Lime and alumina

Lime and silica

Silica and alumina

Lime and iron

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

All of these

30, 70

25, 75

35, 65

Building Material MCQs Set-6

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