Building Material MCQs Set-6

Page 1 of 4

1. 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

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

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

All of these

2. The main ingredients of Portland cement are

Silica and alumina

Lime and silica

Lime and alumina

Lime and iron

3. For sanitary pipes and chemical stonewares,

Opaque glazing is used

None of these

Lead glazing is used

Salt glazing is used

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

Along the direction of bedding planes

Perpendicular to the direction of bedding planes

At 45° to the direction of bedding planes

At 60° to the direction of bedding planes

5. Strength of cement concrete primarily depends upon

Quality of water

Quantity of aggregate

Quantity of cement

Water-cement ratio

6. Hydraulic lime is obtained by

Resin, oil and turpentine

Spirit, oil and wax

Oil, wax and resin

Synthetic resin and spirit

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

Single Flemish bond

English bond

Double Flemish bond

Zigzag bond

8. Cast iron contains carbon approximately

1.5% to 5.5%

None of these

0.05% to 1.75%

0.250 %

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

None of the above

Calcium carbonate

Calcium chloride

Gypsum

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

Hornblende

Augite

Biotite

All of these

Page 2 of 4

11. 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

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

Equal to 1

Less than 1 in beams but greater than 1 in channels

Greater than 1

Less than 1

13. Gypsum is a

Mechanically formed sedimentary rock

Chemically precipitated sedimentary rock

Igneous rock

Metamorphic rock

14. Seasoning of timber is done

To make it water proof

To increase its temperature

To remove water

To paint its surface

15. Non acid-resistant asbestos is:

None of these

Amosite asbestos

Tremolite asbestos

Chrysotile asbestos

16. Blister steel

Is obtained by cementation process

All of these

Can be easily welded

Is full of fissures and cavities

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

35, 65

All of these

25, 75

30, 70

18. 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

All of these

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

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

19. 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 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

20. Soundness of cement is tested by

Compressive strength testing apparatus

None of these

Le-chatelier apparatus

Vicat's apparatus

Page 3 of 4

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

160 N/mm²

420 N/mm²

520 N/mm²

260 N/mm²

22. 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

Magnesia

Alumina

23. Asbestos

Is a natural fibrous mineral substance

Contains iron oxide and alumina

All of these

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

24. The most commonly used retarder in cement is

Gypsum

Calcium carbonate

Calcium chloride

None of the above

25. 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

26. A bull nose brick is not used for

Pillars

Rounding off sharp corners

Decoration purpose

Arches

27. First class timber has an average life of

Less than one year

1 to 5 years

5 to 10 years

More than 10 years

28. Gypsum consists of

Lime and H₂O

CO₂ and calcium

CaSO4 and H₂O

H₂S and CO₂

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

1 : 6

1 : 4

1 : 2

1 : 8

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

Granite

Quartzite

Lime stone

Sand stone

Page 4 of 4

31. The main function of alumina in brick earth is

To make the brick durable

To impart plasticity

To prevent shrinkage

To make the brick impermeable

32. Which of the following is a rock?

None of these

Quartz

Gypsum

Mica

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

50 mm

70.6 mm

100 mm

150 mm

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

Quartz

Feldspar

All of these

Clay

35. Which of the following trees yields hard wood?

Chir

Deodar

Shishum

Pine

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

Cleavage

Structure

Texture

Fracture

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

Magnesia

Iron

Silica

Alumina

38. After storage, the strength of cement

Decreases

Remains same

May increase or decrease

Increases

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

Silica and alkalies

Alkalies and magnesium

Alumina and iron

Lime stone and alumina

40. Bitumen may be dissolved in

Carbondioxide

Carbon disulphide

Sodium chloride

Water

Building Material MCQs Set-6

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