Building Materials MCQs Set-8

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1. Age of a tree may be ascertained by

Radius of its stem

Circumference of its stem

Number of annual rings

Number of branches

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

Half brick thick

One brick thick

One and a half bricks thick

Two bricks thick

3. Sea sand used in structures causes

Dampness

Disintegration

All of these

Efflorescence

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

Bolster

Square

Scutch

Trowel

5. Addition of pozzolana to ordinary Portland cement increases

Permeability

Shrinkage

Heat of hydration

Bleeding

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

Refractory bricks

First class bricks

Over-burnt bricks

Under-burnt bricks

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

22 %

15 %

25 %

20 %

8. 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

9. Cast steel is manufactured by

Cementation process

Bessemer process

Crucible process

Open hearth process

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

2000 kg

1800 kg

1500 kg

1200 kg

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

25 %

35 %

15 %

5 %

12. Bitumen is generally obtained from

Organic material

Petroleum product

Synthetic material

Coal

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 (iv)

(iii) and (iv)

(ii) and (iii)

(i) and (ii)

14. Which of the following is a mineral?

Granite

Basalt

Syenite

Quartz

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

21 MPa

7 MPa

16 MPa

11.5 MPa

16. 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

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

Calcareous rocks

Siliceous rocks

Argillaceous rocks

Sedimentary rocks

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

1.7

2.7

1.5

2.2

19. 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

None of these

20 %

10 %

15 %

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

Batten

Baulk

Plank

Log

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21. Cross cut saw is used for

Cutting hard stones

Cutting large blocks of stones

Dressing stones

Cutting soft stones

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

10 m

20 m

30 m

40 m

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

Calcium oxide

Water

Clay

Silica

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

The toughness of the stone

The presence of soluble matter of stone

The compressive strength of the stone

The hardness of the stone

25. The commonly used thinner in oil paints, is

(A) Naphtha

(D) None the these

(B) Turpentine

(C) Both (a) and (b)

26. Bulking of sand is caused due to

Clay contents

Air voids

Surface moisture

Viscosity

27. Pick up the correct statement from the following:

The fillers are inert materials and they impart strength and hardness

Catalysts are added to assist and accelerate the hardening of resin

All of these

Fibrous fillers increase thermal resistance

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

Quartz and mica are minerals

There is no sedimentary rock

Basalt and marble are the only metamorphic rocks

Granite is the only igneous rock

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

Ferrous oxide

Zinc white

White lead

Red lead

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

Wood work

Both wood work and iron work

Iron work

None of the above

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31. Plastics are compounds of carbon with element

All of these

Nitrogen

Oxygen

Hydrogen

32. Slate is formed by metamorphic action on

Lime stone

Shale

Granite

Sand stone

33. Pug mill is used for

Preparation of clay

Moulding of clay

Drying of bricks

Burning of bricks

34. Generally wooden moulds are made from

Teak wood

Shishum wood

Deodar wood

Ply wood

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

Rapid hardening cement

Sulphate resisting cement

Low heat cement

Ordinary Portland cement

36. Calcination of iron ores is done

To remove moisture

To remove carbonic acid

All of these

By roasting in heaps

37. Pick up the synthetic resin from the following:

Resorcinol resin

Urea resin

Phenolic resin

All of these

38. The foliated structure is very common in

Sedimentary rocks

Igneous rocks

Metamorphic rocks

None of these

39. Sandstone is a

(i) Sedimentary rock

(ii) Aqueous rock

(iii) Siliceous rock

The correct answer is

Both (i) and (ii)

Both (i) and (iii)

Only (i)

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

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

100 kg/cm2

90 kg/cm2

120 kg/cm2

75 kg/cm2

Building Materials MCQs Set-8

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