Building Materials MCQs Set-8

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1. Expansion joints in masonry walls are provided if length exceeds

10 m

30 m

40 m

20 m

2. For a good building stone, its specific gravity should the greater than

1.7

2.7

2.2

1.5

3. Addition of pozzolana to ordinary Portland cement increases

Shrinkage

Heat of hydration

Permeability

Bleeding

4. What is the answer to this question?The weight of 1 m³ of brick earth, is about

1800 kg

1500 kg

2000 kg

1200 kg

5. The practical limit of moisture content achieved in air drying of timber is

15 %

5 %

25 %

35 %

6. Calcination of iron ores is done

By roasting in heaps

To remove carbonic acid

All of these

To remove moisture

7. Sea sand used in structures causes

All of these

Disintegration

Dampness

Efflorescence

8. The foliated structure is very common in

None of these

Igneous rocks

Sedimentary rocks

Metamorphic rocks

9. Pug mill is used for

Drying of bricks

Preparation of clay

Moulding of clay

Burning of bricks

10. The commonly used thinner in oil paints, is

(D) None the these

(A) Naphtha

(C) Both (a) and (b)

(B) Turpentine

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11. Generally wooden moulds are made from

Ply wood

Teak wood

Shishum wood

Deodar wood

12. The minimum compressive strength of 2nd class bricks should be

120 kg/cm2

90 kg/cm2

75 kg/cm2

100 kg/cm2

13. Plastics are compounds of carbon with element

All of these

Nitrogen

Hydrogen

Oxygen

14. Glazing of clay products, is done

To improve their appearance

To protect them from atmospheric effect

All of these

To protect them from corrosive action

15. The pigment used in paints for corrosive resistance, is

Zinc white

Ferrous oxide

White lead

Red lead

16. The weight of a good quality brick when immersed in water for a period of 16 hours should not exceed the weight of dry brick

20 %

10 %

None of these

15 %

17. Which of the following is a mineral?

Syenite

Basalt

Quartz

Granite

18. Bitumen is generally obtained from

Petroleum product

Organic material

Synthetic material

Coal

19. Slate is formed by metamorphic action on

Granite

Shale

Lime stone

Sand stone

20. Cast steel is manufactured by

Bessemer process

Open hearth process

Cementation process

Crucible process

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21. Cross cut saw is used for

Cutting soft stones

Dressing stones

Cutting large blocks of stones

Cutting hard stones

22. Smith's test of stones is performed to find out

The compressive strength of the stone

The presence of soluble matter of stone

The hardness of the stone

The toughness of the stone

23. Which of the following cements is suitable for use in massive concrete structures such as large dams?

Rapid hardening cement

Sulphate resisting cement

Ordinary Portland cement

Low heat cement

24. Based on the following rocks and minerals, select the correct statement, quartz, shale, basalt, granite, marble, gypsum, mica

Granite is the only igneous rock

Basalt and marble are the only metamorphic rocks

There is no sedimentary rock

Quartz and mica are minerals

25. Sandstone is a

(i) Sedimentary rock

(ii) Aqueous rock

(iii) Siliceous rock

The correct answer is

All (i), (ii) and (iii)

Both (i) and (iii)

Only (i)

Both (i) and (ii)

26. Which of the following bricks are used for lining of furnaces?

First class bricks

Under-burnt bricks

Refractory bricks

Over-burnt bricks

27. Study the following statements.

(i) Hydraulic lime is suitable for white washing,

(ii) Fat lime is suitable for whitewashing,

(iii) Hydraulic lime is suitable for making mortar,

(iv) Fat lime is suitable for making mortar.

The correct answer is

(i) and (iv)

(ii) and (iii)

(iii) and (iv)

(i) and (ii)

28. The trunk of tree left after cutting all the branches is known as

Plank

Baulk

Log

Batten

29. The main constituent which imparts hydraulicity to hydraulic lime is

Water

Clay

Silica

Calcium oxide

30. The most important tool in brick laying for lifting and spreading mortar and for forming joints is

Bolster

Scutch

Trowel

Square

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31. Bulking of sand is caused due to

Surface moisture

Air voids

Clay contents

Viscosity

32. The rocks having alumina or clay as their major constituents are known as

Argillaceous rocks

Siliceous rocks

Calcareous rocks

Sedimentary rocks

33. A first class brick when immersed in cold water for 24 hours should not absorb water more than

22 %

20 %

15 %

25 %

34. Paints with white lead base are suitable for painting of

Iron work

None of the above

Wood work

Both wood work and iron work

35. Minimum thickness of wall where single Flemish bond can be used is

Half brick thick

One and a half bricks thick

Two bricks thick

One brick thick

36. Pick up the correct statement from the following:

All of these

Fibrous fillers increase thermal resistance

Catalysts are added to assist and accelerate the hardening of resin

The fillers are inert materials and they impart strength and hardness

37. The nominal size of the modular brick is

200 mm × 100 mm × 100 mm

200 mm × 200 mm × 100 mm

190 mm × 190 mm × 90 mm

190 mm × 90 mm × 80 mm

38. According to IS specifications, the compressive strength of ordinary Portland cement after three days should not be less than

11.5 MPa

21 MPa

16 MPa

7 MPa

39. Age of a tree may be ascertained by

Number of branches

Number of annual rings

Circumference of its stem

Radius of its stem

40. Pick up the synthetic resin from the following:

Phenolic resin

Resorcinol resin

Urea resin

All of these

Building Materials MCQs Set-8

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