Building Material MCQs Set-6

Page 1 of 4

1. Soundness of cement is tested by

Compressive strength testing apparatus

None of these

Vicat's apparatus

Le-chatelier apparatus

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

260 N/mm²

520 N/mm²

420 N/mm²

160 N/mm²

3. Asbestos

All of these

Is a natural fibrous mineral substance

Contains iron oxide and alumina

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

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

Sand stone

Quartzite

Granite

Lime stone

5. A bull nose brick is not used for

Pillars

Rounding off sharp corners

Decoration purpose

Arches

6. 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

7. Seasoning of timber is done

To paint its surface

To make it water proof

To remove water

To increase its temperature

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

Cleavage

Structure

Fracture

Texture

9. Cast iron

Is manufactured in required shapes

All of these

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

Is obtained by purifying pig iron

10. After storage, the strength of cement

Remains same

Increases

Decreases

May increase or decrease

Page 2 of 4

11. Cast iron contains carbon approximately

0.250 %

0.05% to 1.75%

None of these

1.5% to 5.5%

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

Calcium chloride

None of the above

Calcium carbonate

Gypsum

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

Volcanic rocks

Plutonic rocks

Igneous rocks

Hypabyssal rocks

14. For sanitary pipes and chemical stonewares,

Lead glazing is used

Opaque glazing is used

None of these

Salt glazing is used

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

70.6 mm

100 mm

50 mm

150 mm

16. The main ingredients of Portland cement are

Silica and alumina

Lime and alumina

Lime and silica

Lime and iron

17. Gypsum is a

Metamorphic rock

Chemically precipitated sedimentary rock

Mechanically formed sedimentary rock

Igneous rock

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

Clay

Feldspar

Quartz

All of these

19. A queen closer is a

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

Brick having the same length and depth as the other bricks but half the breadth

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

Alumina

Iron-oxide

Magnesia

Lime

Page 3 of 4

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

Silica

Magnesia

Iron

Alumina

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

Alumina and iron

Alkalies and magnesium

Lime stone and alumina

Silica and alkalies

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

35, 65

30, 70

All of these

25, 75

24. Strength of cement concrete primarily depends upon

Quality of water

Quantity of aggregate

Water-cement ratio

Quantity of cement

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

1 : 4

1 : 6

1 : 8

1 : 2

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

At 45° to the direction of bedding planes

Along the direction of bedding planes

Perpendicular to the direction of bedding planes

At 60° to the direction of bedding planes

27. 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

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

Single Flemish bond

English bond

Zigzag bond

Double Flemish bond

29. First class timber has an average life of

Less than one year

1 to 5 years

5 to 10 years

More than 10 years

30. Which of the following trees yields hard wood?

Pine

Deodar

Shishum

Chir

Page 4 of 4

31. Bitumen may be dissolved in

Water

Sodium chloride

Carbondioxide

Carbon disulphide

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

Augite

Hornblende

Biotite

All of these

33. 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

34. The most commonly used retarder in cement is

None of the above

Gypsum

Calcium chloride

Calcium carbonate

35. Blister steel

Is full of fissures and cavities

All of these

Is obtained by cementation process

Can be easily welded

36. Non acid-resistant asbestos is:

Tremolite asbestos

Chrysotile asbestos

Amosite asbestos

None of these

37. Gypsum consists of

Lime and H₂O

CO₂ and calcium

CaSO4 and H₂O

H₂S and CO₂

38. 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

Less than 1 in beams but greater than 1 in channels

Greater than 1

39. Which of the following is a rock?

Mica

None of these

Gypsum

Quartz

40. Hydraulic lime is obtained by

Synthetic resin and spirit

Spirit, oil and wax

Resin, oil and turpentine

Oil, wax and resin

Building Material MCQs Set-6

Related

Leave a ReplyCancel reply

Secured Payments

Protection

Building Material MCQs Set-6

Share this Now with Friends:

Related

Leave a ReplyCancel reply

Secured Payments

Protection