Building Materials MCQs Set-8

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1. 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

15 %

10 %

20 %

2. Glazing of clay products, is done

To protect them from corrosive action

All of these

To improve their appearance

To protect them from atmospheric effect

3. Addition of pozzolana to ordinary Portland cement increases

Permeability

Bleeding

Shrinkage

Heat of hydration

4. Cast steel is manufactured by

Open hearth process

Bessemer process

Cementation process

Crucible process

5. Generally wooden moulds are made from

Deodar wood

Shishum wood

Ply wood

Teak wood

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

15 %

25 %

5 %

35 %

7. Calcination of iron ores is done

To remove moisture

By roasting in heaps

To remove carbonic acid

All of these

8. The nominal size of the modular brick is

200 mm × 200 mm × 100 mm

190 mm × 190 mm × 90 mm

190 mm × 90 mm × 80 mm

200 mm × 100 mm × 100 mm

9. Age of a tree may be ascertained by

Number of annual rings

Number of branches

Circumference of its stem

Radius of its stem

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

The hardness of the stone

The compressive strength of the stone

The toughness of the stone

The presence of soluble matter of stone

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

30 m

40 m

20 m

10 m

12. The foliated structure is very common in

Igneous rocks

Sedimentary rocks

None of these

Metamorphic rocks

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

16 MPa

21 MPa

7 MPa

11.5 MPa

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

2.7

1.5

1.7

2.2

15. Bitumen is generally obtained from

Coal

Synthetic material

Organic material

Petroleum product

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

Red lead

Zinc white

Ferrous oxide

White lead

17. Bulking of sand is caused due to

Air voids

Clay contents

Viscosity

Surface moisture

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

Bolster

Square

Scutch

Trowel

19. Cross cut saw is used for

Cutting soft stones

Cutting large blocks of stones

Cutting hard stones

Dressing stones

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

Batten

Plank

Baulk

Log

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

90 kg/cm2

120 kg/cm2

75 kg/cm2

100 kg/cm2

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

Sedimentary rocks

Argillaceous rocks

Siliceous rocks

Calcareous rocks

23. Pick up the synthetic resin from the following:

Phenolic resin

All of these

Resorcinol resin

Urea resin

24. Which of the following is a mineral?

Syenite

Quartz

Granite

Basalt

25. Plastics are compounds of carbon with element

Hydrogen

All of these

Nitrogen

Oxygen

26. Sea sand used in structures causes

All of these

Efflorescence

Dampness

Disintegration

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

Sulphate resisting cement

Low heat cement

Rapid hardening cement

Ordinary Portland cement

28. 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)

(i) and (iv)

(iii) and (iv)

(ii) and (iii)

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

Over-burnt bricks

Under-burnt bricks

Refractory bricks

First class bricks

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

None of the above

Iron work

Both wood work and iron work

Wood work

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

One brick thick

Two bricks thick

One and a half bricks thick

Half brick thick

32. Sandstone is a

(i) Sedimentary rock

(ii) Aqueous rock

(iii) Siliceous rock

The correct answer is

Both (i) and (iii)

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

Only (i)

Both (i) and (ii)

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

25 %

15 %

22 %

20 %

34. 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

35. Slate is formed by metamorphic action on

Granite

Sand stone

Lime stone

Shale

36. 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

There is no sedimentary rock

Granite is the only igneous rock

37. Pug mill is used for

Burning of bricks

Preparation of clay

Moulding of clay

Drying of bricks

38. Pick up the correct statement from the following:

All of these

Catalysts are added to assist and accelerate the hardening of resin

Fibrous fillers increase thermal resistance

The fillers are inert materials and they impart strength and hardness

39. The commonly used thinner in oil paints, is

(A) Naphtha

(D) None the these

(C) Both (a) and (b)

(B) Turpentine

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

Clay

Water

Silica

Calcium oxide

Building Materials MCQs Set-8

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