Building Materials MCQs Set-8

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

None of the above

Wood work

Iron work

Both wood work and iron work

2. Addition of pozzolana to ordinary Portland cement increases

Shrinkage

Bleeding

Heat of hydration

Permeability

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

Quartz and mica are minerals

Basalt and marble are the only metamorphic rocks

Granite is the only igneous rock

There is no sedimentary rock

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

The hardness of the stone

The compressive strength of the stone

The presence of soluble matter of stone

The toughness of the stone

5. Generally wooden moulds are made from

Ply wood

Deodar wood

Teak wood

Shishum wood

6. Sandstone is a

(i) Sedimentary rock

(ii) Aqueous rock

(iii) Siliceous rock

The correct answer is

Only (i)

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

Both (i) and (iii)

Both (i) and (ii)

7. Cross cut saw is used for

Cutting hard stones

Cutting large blocks of stones

Cutting soft stones

Dressing stones

8. 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

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

2000 kg

1500 kg

1800 kg

1200 kg

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

10 m

30 m

20 m

40 m

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

Silica

Clay

Calcium oxide

Water

12. Pick up the synthetic resin from the following:

All of these

Phenolic resin

Urea resin

Resorcinol resin

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

1.7

2.7

1.5

2.2

14. 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

(iii) and (iv)

(i) and (ii)

(ii) and (iii)

(i) and (iv)

15. Calcination of iron ores is done

All of these

To remove carbonic acid

By roasting in heaps

To remove moisture

16. Slate is formed by metamorphic action on

Shale

Granite

Lime stone

Sand stone

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

35 %

15 %

5 %

25 %

18. 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

10 %

20 %

15 %

None of these

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

Baulk

Batten

Log

Plank

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

Over-burnt bricks

Under-burnt bricks

First class bricks

Refractory bricks

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21. Which of the following is a mineral?

Syenite

Granite

Basalt

Quartz

22. Sea sand used in structures causes

Efflorescence

All of these

Disintegration

Dampness

23. Age of a tree may be ascertained by

Radius of its stem

Number of annual rings

Number of branches

Circumference of its stem

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

Bolster

Scutch

Trowel

Square

25. The commonly used thinner in oil paints, is

(A) Naphtha

(B) Turpentine

(C) Both (a) and (b)

(D) None the these

26. Bitumen is generally obtained from

Petroleum product

Coal

Organic material

Synthetic material

27. 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

28. Pick up the correct statement from the following:

All of these

Fibrous fillers increase thermal resistance

The fillers are inert materials and they impart strength and hardness

Catalysts are added to assist and accelerate the hardening of resin

29. Plastics are compounds of carbon with element

Nitrogen

Hydrogen

All of these

Oxygen

30. Pug mill is used for

Preparation of clay

Moulding of clay

Drying of bricks

Burning of bricks

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

7 MPa

11.5 MPa

21 MPa

16 MPa

32. The foliated structure is very common in

Metamorphic rocks

Igneous rocks

Sedimentary rocks

None of these

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

100 kg/cm2

75 kg/cm2

120 kg/cm2

90 kg/cm2

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

15 %

20 %

25 %

22 %

35. Bulking of sand is caused due to

Viscosity

Surface moisture

Clay contents

Air voids

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

Low heat cement

Sulphate resisting cement

Ordinary Portland cement

Rapid hardening cement

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

One and a half bricks thick

Half brick thick

Two bricks thick

One brick thick

38. Cast steel is manufactured by

Cementation process

Open hearth process

Crucible process

Bessemer process

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

Calcareous rocks

Argillaceous rocks

Sedimentary rocks

Siliceous rocks

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

White lead

Zinc white

Red lead

Ferrous oxide

Building Materials MCQs Set-8

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