Building Materials MCQs Set-8

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

Log

Batten

Baulk

Plank

2. The nominal size of the modular brick is

190 mm × 190 mm × 90 mm

200 mm × 100 mm × 100 mm

200 mm × 200 mm × 100 mm

190 mm × 90 mm × 80 mm

3. Addition of pozzolana to ordinary Portland cement increases

Heat of hydration

Bleeding

Permeability

Shrinkage

4. The foliated structure is very common in

Sedimentary rocks

None of these

Igneous rocks

Metamorphic rocks

5. Pug mill is used for

Drying of bricks

Preparation of clay

Moulding of clay

Burning of bricks

6. Bulking of sand is caused due to

Clay contents

Air voids

Viscosity

Surface moisture

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

11.5 MPa

21 MPa

7 MPa

16 MPa

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

Under-burnt bricks

Over-burnt bricks

Refractory bricks

First class bricks

10. Sea sand used in structures causes

Dampness

Disintegration

Efflorescence

All of these

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

Clay

Water

Calcium oxide

Silica

12. Pick up the synthetic resin from the following:

Resorcinol resin

All of these

Urea resin

Phenolic resin

13. Calcination of iron ores is done

All of these

To remove moisture

By roasting in heaps

To remove carbonic acid

14. Which of the following is a mineral?

Granite

Basalt

Quartz

Syenite

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

20 m

40 m

30 m

10 m

16. Cross cut saw is used for

Cutting soft stones

Cutting large blocks of stones

Dressing stones

Cutting hard stones

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

The compressive strength of the stone

The hardness of the stone

The presence of soluble matter of stone

The toughness of the stone

18. Pick up the correct statement from the following:

Fibrous fillers increase thermal resistance

The fillers are inert materials and they impart strength and hardness

All of these

Catalysts are added to assist and accelerate the hardening of resin

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

Scutch

Square

Bolster

Trowel

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

35 %

15 %

25 %

5 %

22. 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

(ii) and (iii)

(i) and (ii)

(i) and (iv)

(iii) and (iv)

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

Ferrous oxide

White lead

Zinc white

Red lead

24. The commonly used thinner in oil paints, is

(D) None the these

(C) Both (a) and (b)

(B) Turpentine

(A) Naphtha

25. Generally wooden moulds are made from

Shishum wood

Deodar wood

Teak wood

Ply wood

26. Cast steel is manufactured by

Cementation process

Bessemer process

Open hearth process

Crucible process

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

75 kg/cm2

90 kg/cm2

120 kg/cm2

100 kg/cm2

28. 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

29. Plastics are compounds of carbon with element

Oxygen

Nitrogen

Hydrogen

All of these

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

Ordinary Portland cement

Rapid hardening cement

Sulphate resisting cement

Low heat cement

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31. Bitumen is generally obtained from

Organic material

Petroleum product

Coal

Synthetic material

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

2.2

1.5

2.7

1.7

33. 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

Quartz and mica are minerals

There is no sedimentary rock

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

Argillaceous rocks

Siliceous rocks

Sedimentary rocks

Calcareous rocks

35. Slate is formed by metamorphic action on

Shale

Lime stone

Sand stone

Granite

36. Sandstone is a

(i) Sedimentary rock

(ii) Aqueous rock

(iii) Siliceous rock

The correct answer is

Both (i) and (ii)

Only (i)

Both (i) and (iii)

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

37. Age of a tree may be ascertained by

Number of annual rings

Number of branches

Circumference of its stem

Radius of its stem

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

1800 kg

1200 kg

1500 kg

2000 kg

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

Iron work

Wood work

Both wood work and iron work

None of the above

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

22 %

25 %

15 %

20 %

Building Materials MCQs Set-8

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