Building Material MCQs Set-6

Page 1 of 4

1. Blister steel

All of these

Is obtained by cementation process

Is full of fissures and cavities

Can be easily welded

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

100 mm

150 mm

50 mm

70.6 mm

3. Seasoning of timber is done

To remove water

To make it water proof

To increase its temperature

To paint its surface

4. Strength of cement concrete primarily depends upon

Water-cement ratio

Quantity of cement

Quantity of aggregate

Quality of water

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

35, 65

All of these

30, 70

25, 75

6. A queen closer is a

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 length parallel to the face or direction of wall

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

7. Bitumen may be dissolved in

Water

Sodium chloride

Carbondioxide

Carbon disulphide

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

None of the above

Calcium chloride

Gypsum

Calcium carbonate

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

Less than 1

Less than 1 in beams but greater than 1 in channels

Greater than 1

Equal to 1

10. Which of the following trees yields hard wood?

Shishum

Deodar

Chir

Pine

Page 2 of 4

11. Gypsum is a

Metamorphic rock

Mechanically formed sedimentary rock

Chemically precipitated sedimentary rock

Igneous rock

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

Silica

Iron

Alumina

Magnesia

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

1 : 8

1 : 2

1 : 4

1 : 6

14. The main ingredients of Portland cement are

Lime and iron

Lime and silica

Lime and alumina

Silica and alumina

15. The most commonly used retarder in cement is

Gypsum

None of the above

Calcium carbonate

Calcium chloride

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

Zigzag bond

Double Flemish bond

Single Flemish bond

English bond

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

Structure

Texture

Fracture

Cleavage

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

At 60° to the direction of bedding planes

Perpendicular to the direction of bedding planes

Along the direction of bedding planes

At 45° to the direction of bedding planes

19. The main function of alumina in brick earth is

To prevent shrinkage

To impart plasticity

To make the brick impermeable

To make the brick durable

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

Hypabyssal rocks

Igneous rocks

Volcanic rocks

Plutonic rocks

Page 3 of 4

21. Soundness of cement is tested by

Compressive strength testing apparatus

Vicat's apparatus

Le-chatelier apparatus

None of these

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

260 N/mm²

520 N/mm²

420 N/mm²

160 N/mm²

23. First class timber has an average life of

1 to 5 years

Less than one year

More than 10 years

5 to 10 years

24. 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

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

Lime stone

Quartzite

Granite

Sand stone

26. Asbestos

Is a natural fibrous mineral substance

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

Contains iron oxide and alumina

All of these

27. Cast iron contains carbon approximately

0.250 %

0.05% to 1.75%

None of these

1.5% to 5.5%

28. Gypsum consists of

CaSO4 and H₂O

CO₂ and calcium

Lime and H₂O

H₂S and CO₂

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

Augite

Biotite

All of these

Hornblende

30. Cast iron

All of these

Is obtained by purifying pig iron

Is manufactured in required shapes

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

Page 4 of 4

31. Which of the following is a rock?

Gypsum

Quartz

None of these

Mica

32. Hydraulic lime is obtained by

Synthetic resin and spirit

Spirit, oil and wax

Oil, wax and resin

Resin, oil and turpentine

33. A bull nose brick is not used for

Decoration purpose

Arches

Rounding off sharp corners

Pillars

34. Non acid-resistant asbestos is:

Tremolite asbestos

None of these

Amosite asbestos

Chrysotile asbestos

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

Feldspar

Quartz

Clay

All of these

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

Alumina and iron

Lime stone and alumina

Silica and alkalies

Alkalies and magnesium

37. After storage, the strength of cement

Remains same

May increase or decrease

Increases

Decreases

38. 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

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

39. Pick up the correct statement from the following:

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

All of these

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

Crawling paints may be cured by sand preparing the surface and giving a fresh coat with plenty of turps

40. For sanitary pipes and chemical stonewares,

Opaque glazing is used

Salt glazing is used

Lead glazing is used

None of these

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