Building Material MCQs Set-6

Page 1 of 4

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

1 : 6

1 : 2

1 : 8

1 : 4

2. For sanitary pipes and chemical stonewares,

Opaque glazing is used

Salt glazing is used

None of these

Lead glazing is used

3. 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

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

160 N/mm²

260 N/mm²

520 N/mm²

420 N/mm²

5. Hydraulic lime is obtained by

Oil, wax and resin

Spirit, oil and wax

Synthetic resin and spirit

Resin, oil and turpentine

6. Which of the following is a rock?

Quartz

Gypsum

None of these

Mica

7. 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

8. Gypsum is a

Mechanically formed sedimentary rock

Igneous rock

Chemically precipitated sedimentary rock

Metamorphic rock

9. Strength of cement concrete primarily depends upon

Water-cement ratio

Quantity of cement

Quantity of aggregate

Quality of water

10. Blister steel

All of these

Can be easily welded

Is full of fissures and cavities

Is obtained by cementation process

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11. The most commonly used retarder in cement is

Calcium chloride

Gypsum

Calcium carbonate

None of the above

12. A bull nose brick is not used for

Rounding off sharp corners

Decoration purpose

Arches

Pillars

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

Alumina

Iron

Silica

Magnesia

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

Less than 1 in beams but greater than 1 in channels

Less than 1

Equal to 1

Greater than 1

15. Seasoning of timber is done

To increase its temperature

To make it water proof

To paint its surface

To remove water

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

Zigzag bond

English bond

Single Flemish bond

Double Flemish bond

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

Silica and alkalies

Lime stone and alumina

Alumina and iron

Alkalies and magnesium

18. Non acid-resistant asbestos is:

Amosite asbestos

Chrysotile asbestos

Tremolite asbestos

None of these

19. 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

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

Quartzite

Granite

Sand stone

Lime stone

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21. First class timber has an average life of

1 to 5 years

More than 10 years

Less than one year

5 to 10 years

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

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

All of these

24. Asbestos

All of these

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

Is a natural fibrous mineral substance

Contains iron oxide and alumina

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

Calcium chloride

Calcium carbonate

Gypsum

None of the above

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

150 mm

100 mm

50 mm

70.6 mm

27. Cast iron

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

Is obtained by purifying pig iron

All of these

Is manufactured in required shapes

28. The main ingredients of Portland cement are

Lime and alumina

Silica and alumina

Lime and silica

Lime and iron

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

Feldspar

All of these

Quartz

Clay

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

Fracture

Texture

Cleavage

Structure

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31. Soundness of cement is tested by

Le-chatelier apparatus

Vicat's apparatus

Compressive strength testing apparatus

None of these

32. Cast iron contains carbon approximately

None of these

0.250 %

0.05% to 1.75%

1.5% to 5.5%

33. Which of the following trees yields hard wood?

Chir

Shishum

Pine

Deodar

34. The main function of alumina in brick earth is

To impart plasticity

To make the brick durable

To prevent shrinkage

To make the brick impermeable

35. 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

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

35, 65

30, 70

25, 75

All of these

37. Gypsum consists of

Lime and H₂O

CO₂ and calcium

H₂S and CO₂

CaSO4 and H₂O

38. Bitumen may be dissolved in

Water

Sodium chloride

Carbon disulphide

Carbondioxide

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

Hornblende

Augite

Biotite

All of these

40. After storage, the strength of cement

Increases

Remains same

Decreases

May increase or decrease

Building Material MCQs Set-6

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