Building Material MCQs Set-6

Page 1 of 4

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

Lime stone

Sand stone

Quartzite

Granite

2. 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

Equal to 1

Greater than 1

Less than 1

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

1 : 4

1 : 2

1 : 8

1 : 6

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

25, 75

30, 70

35, 65

All of these

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

70.6 mm

50 mm

100 mm

150 mm

6. 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

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

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

Biotite

All of these

Hornblende

Augite

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

Single Flemish bond

Zigzag bond

English bond

Double Flemish bond

9. Cast iron contains carbon approximately

1.5% to 5.5%

0.250 %

None of these

0.05% to 1.75%

10. Seasoning of timber is done

To make it water proof

To increase its temperature

To paint its surface

To remove water

Page 2 of 4

11. Strength of cement concrete primarily depends upon

Water-cement ratio

Quality of water

Quantity of cement

Quantity of aggregate

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

Iron

Silica

Magnesia

Alumina

13. Gypsum consists of

CaSO4 and H₂O

Lime and H₂O

H₂S and CO₂

CO₂ and calcium

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

Structure

Texture

Cleavage

Fracture

15. Blister steel

Is obtained by cementation process

Can be easily welded

All of these

Is full of fissures and cavities

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

520 N/mm²

260 N/mm²

160 N/mm²

420 N/mm²

17. A bull nose brick is not used for

Pillars

Decoration purpose

Rounding off sharp corners

Arches

18. Bitumen may be dissolved in

Water

Sodium chloride

Carbon disulphide

Carbondioxide

19. The main ingredients of Portland cement are

Lime and alumina

Silica and alumina

Lime and silica

Lime and iron

20. Hydraulic lime is obtained by

Synthetic resin and spirit

Resin, oil and turpentine

Oil, wax and resin

Spirit, oil and wax

Page 3 of 4

21. Gypsum is a

Mechanically formed sedimentary rock

Igneous rock

Chemically precipitated sedimentary rock

Metamorphic rock

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

Gypsum

Calcium carbonate

None of the above

Calcium chloride

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

Magnesia

Iron-oxide

Lime

Alumina

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

Igneous rocks

Plutonic rocks

Volcanic rocks

Hypabyssal rocks

25. After storage, the strength of cement

Remains same

Decreases

May increase or decrease

Increases

26. Which of the following is a rock?

None of these

Gypsum

Mica

Quartz

27. Asbestos

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

Is a natural fibrous mineral substance

Contains iron oxide and alumina

All of these

28. Soundness of cement is tested by

Vicat's apparatus

Le-chatelier apparatus

None of these

Compressive strength testing apparatus

29. First class timber has an average life of

Less than one year

More than 10 years

1 to 5 years

5 to 10 years

30. The main function of alumina in brick earth is

To make the brick durable

To make the brick impermeable

To prevent shrinkage

To impart plasticity

Page 4 of 4

31. 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

32. Cast iron

Is manufactured in required shapes

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

All of these

Is obtained by purifying pig iron

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

Along the direction of bedding planes

At 45° to the direction of bedding planes

At 60° to the direction of bedding planes

Perpendicular to the direction of bedding planes

34. 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

35. A queen closer is a

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

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

36. Non acid-resistant asbestos is:

Chrysotile asbestos

Amosite asbestos

Tremolite asbestos

None of these

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

Clay

Quartz

All of these

Feldspar

38. Which of the following trees yields hard wood?

Chir

Shishum

Pine

Deodar

39. The most commonly used retarder in cement is

Calcium chloride

Calcium carbonate

Gypsum

None of the above

40. For sanitary pipes and chemical stonewares,

Lead glazing is used

None of these

Opaque glazing is used

Salt glazing is used

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