Building Materials MCQs Set-8

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

20 m

10 m

30 m

40 m

2. The commonly used thinner in oil paints, is

(C) Both (a) and (b)

(A) Naphtha

(B) Turpentine

(D) None the these

3. Pug mill is used for

Preparation of clay

Burning of bricks

Moulding of clay

Drying of bricks

4. Bulking of sand is caused due to

Clay contents

Surface moisture

Air voids

Viscosity

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

First class bricks

Over-burnt bricks

Refractory bricks

Under-burnt bricks

6. Pick up the correct statement from the following:

All of these

The fillers are inert materials and they impart strength and hardness

Fibrous fillers increase thermal resistance

Catalysts are added to assist and accelerate the hardening of resin

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

7 MPa

16 MPa

21 MPa

11.5 MPa

8. The foliated structure is very common in

None of these

Igneous rocks

Metamorphic rocks

Sedimentary rocks

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

35 %

5 %

25 %

15 %

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

Trowel

Scutch

Bolster

Square

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

2.2

1.7

1.5

2.7

12. Which of the following is a mineral?

Basalt

Syenite

Quartz

Granite

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

Rapid hardening cement

Low heat cement

Sulphate resisting cement

Ordinary Portland cement

14. Plastics are compounds of carbon with element

Hydrogen

Oxygen

Nitrogen

All of these

15. Cross cut saw is used for

Cutting large blocks of stones

Cutting soft stones

Cutting hard stones

Dressing stones

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

One and a half bricks thick

Two bricks thick

One brick thick

Half brick thick

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

Water

Calcium oxide

Silica

Clay

18. Slate is formed by metamorphic action on

Granite

Lime stone

Sand stone

Shale

19. Addition of pozzolana to ordinary Portland cement increases

Shrinkage

Heat of hydration

Bleeding

Permeability

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

Iron work

None of the above

Both wood work and iron work

Wood work

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

Log

Batten

Plank

Baulk

22. 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 %

None of these

15 %

20 %

23. Calcination of iron ores is done

To remove carbonic acid

To remove moisture

All of these

By roasting in heaps

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

75 kg/cm2

100 kg/cm2

120 kg/cm2

90 kg/cm2

25. Cast steel is manufactured by

Cementation process

Open hearth process

Bessemer process

Crucible process

26. 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

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

The presence of soluble matter of stone

The toughness of the stone

The hardness of the stone

The compressive strength of the stone

28. Generally wooden moulds are made from

Deodar wood

Ply wood

Teak wood

Shishum wood

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

1800 kg

1500 kg

1200 kg

2000 kg

30. Age of a tree may be ascertained by

Radius of its stem

Number of annual rings

Circumference of its stem

Number of branches

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

White lead

Red lead

Ferrous oxide

Zinc white

32. Glazing of clay products, is done

To improve their appearance

To protect them from corrosive action

All of these

To protect them from atmospheric effect

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

Sedimentary rocks

Siliceous rocks

Argillaceous rocks

Calcareous rocks

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

22 %

25 %

15 %

20 %

35. Bitumen is generally obtained from

Coal

Petroleum product

Synthetic material

Organic material

36. Sandstone is a

(i) Sedimentary rock

(ii) Aqueous rock

(iii) Siliceous rock

The correct answer is

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

Both (i) and (ii)

Both (i) and (iii)

Only (i)

37. The nominal size of the modular brick is

200 mm × 200 mm × 100 mm

190 mm × 190 mm × 90 mm

200 mm × 100 mm × 100 mm

190 mm × 90 mm × 80 mm

38. Pick up the synthetic resin from the following:

Resorcinol resin

Phenolic resin

All of these

Urea resin

39. Sea sand used in structures causes

Efflorescence

All of these

Disintegration

Dampness

40. 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)

Building Materials MCQs Set-8

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