Building Materials MCQs Set-8

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1. The foliated structure is very common in

None of these

Metamorphic rocks

Sedimentary rocks

Igneous rocks

2. Calcination of iron ores is done

All of these

By roasting in heaps

To remove moisture

To remove carbonic acid

3. Plastics are compounds of carbon with element

All of these

Nitrogen

Hydrogen

Oxygen

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

20 %

22 %

15 %

25 %

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

Argillaceous rocks

Calcareous rocks

Sedimentary rocks

Siliceous rocks

6. Pick up the correct statement from the following:

The fillers are inert materials and they impart strength and hardness

All of these

Fibrous fillers increase thermal resistance

Catalysts are added to assist and accelerate the hardening of resin

7. Pug mill is used for

Drying of bricks

Preparation of clay

Burning of bricks

Moulding of clay

8. Sandstone is a

(i) Sedimentary rock

(ii) Aqueous rock

(iii) Siliceous rock

The correct answer is

Only (i)

Both (i) and (iii)

Both (i) and (ii)

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

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

None of the above

Both wood work and iron work

Wood work

Iron work

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

Refractory bricks

Under-burnt bricks

First class bricks

Over-burnt bricks

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11. The nominal size of the modular brick is

200 mm × 200 mm × 100 mm

190 mm × 90 mm × 80 mm

190 mm × 190 mm × 90 mm

200 mm × 100 mm × 100 mm

12. Cast steel is manufactured by

Crucible process

Bessemer process

Cementation process

Open hearth process

13. 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 (ii)

(ii) and (iii)

(i) and (iv)

(iii) and (iv)

14. Pick up the synthetic resin from the following:

All of these

Urea resin

Resorcinol resin

Phenolic resin

15. Bitumen is generally obtained from

Petroleum product

Organic material

Coal

Synthetic material

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

Silica

Calcium oxide

Clay

Water

17. The commonly used thinner in oil paints, is

(B) Turpentine

(A) Naphtha

(D) None the these

(C) Both (a) and (b)

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

7 MPa

21 MPa

11.5 MPa

16 MPa

19. Generally wooden moulds are made from

Teak wood

Deodar wood

Shishum wood

Ply wood

20. Slate is formed by metamorphic action on

Lime stone

Sand stone

Granite

Shale

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21. Addition of pozzolana to ordinary Portland cement increases

Bleeding

Permeability

Shrinkage

Heat of hydration

22. Bulking of sand is caused due to

Viscosity

Clay contents

Air voids

Surface moisture

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

Half brick thick

One and a half bricks thick

One brick thick

Two bricks thick

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

Low heat cement

Rapid hardening cement

Ordinary Portland cement

Sulphate resisting cement

25. Which of the following is a mineral?

Basalt

Quartz

Granite

Syenite

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

White lead

Red lead

Zinc white

Ferrous oxide

27. Glazing of clay products, is done

To protect them from corrosive action

To improve their appearance

All of these

To protect them from atmospheric effect

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

Basalt and marble are the only metamorphic rocks

Granite is the only igneous rock

There is no sedimentary rock

Quartz and mica are minerals

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

25 %

5 %

35 %

15 %

30. 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 %

15 %

None of these

20 %

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31. Cross cut saw is used for

Cutting soft stones

Cutting hard stones

Cutting large blocks of stones

Dressing stones

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

90 kg/cm2

100 kg/cm2

75 kg/cm2

120 kg/cm2

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

20 m

10 m

30 m

40 m

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

1500 kg

1200 kg

1800 kg

2000 kg

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

Batten

Log

Baulk

Plank

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

The toughness of the stone

The hardness of the stone

The compressive strength of the stone

The presence of soluble matter of stone

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

Scutch

Trowel

Bolster

Square

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

2.2

1.7

1.5

2.7

39. Sea sand used in structures causes

Efflorescence

Dampness

All of these

Disintegration

40. Age of a tree may be ascertained by

Radius of its stem

Number of branches

Circumference of its stem

Number of annual rings

Building Materials MCQs Set-8

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