Building Materials MCQs Set-8

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1. Bulking of sand is caused due to

Viscosity

Surface moisture

Clay contents

Air voids

2. Pug mill is used for

Preparation of clay

Burning of bricks

Moulding of clay

Drying of bricks

3. Calcination of iron ores is done

By roasting in heaps

All of these

To remove moisture

To remove carbonic acid

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

2000 kg

1500 kg

1200 kg

1800 kg

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

White lead

Zinc white

Red lead

Ferrous oxide

6. Bitumen is generally obtained from

Organic material

Petroleum product

Coal

Synthetic material

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

16 MPa

7 MPa

21 MPa

11.5 MPa

8. Cross cut saw is used for

Cutting soft stones

Cutting hard stones

Cutting large blocks of stones

Dressing stones

9. 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

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

None of the above

Wood work

Both wood work and iron work

Iron work

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11. 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

20 %

15 %

None of these

10 %

12. Addition of pozzolana to ordinary Portland cement increases

Shrinkage

Bleeding

Heat of hydration

Permeability

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

20 m

10 m

40 m

30 m

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

Plank

Batten

Baulk

Log

15. Glazing of clay products, is done

All of these

To protect them from atmospheric effect

To protect them from corrosive action

To improve their appearance

16. Slate is formed by metamorphic action on

Shale

Lime stone

Sand stone

Granite

17. The nominal size of the modular brick is

190 mm × 190 mm × 90 mm

190 mm × 90 mm × 80 mm

200 mm × 100 mm × 100 mm

200 mm × 200 mm × 100 mm

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

First class bricks

Refractory bricks

Under-burnt bricks

Over-burnt bricks

19. 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)

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

Half brick thick

Two bricks thick

One brick thick

One and a half bricks thick

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

The hardness of the stone

The toughness of the stone

The compressive strength of the stone

The presence of soluble matter of stone

22. Age of a tree may be ascertained by

Radius of its stem

Circumference of its stem

Number of branches

Number of annual rings

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

Calcareous rocks

Sedimentary rocks

Argillaceous rocks

Siliceous rocks

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

There is no sedimentary rock

Granite is the only igneous rock

Quartz and mica are minerals

Basalt and marble are the only metamorphic rocks

25. Which of the following is a mineral?

Basalt

Granite

Quartz

Syenite

26. The commonly used thinner in oil paints, is

(D) None the these

(A) Naphtha

(C) Both (a) and (b)

(B) Turpentine

27. Pick up the synthetic resin from the following:

Urea resin

All of these

Phenolic resin

Resorcinol resin

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

20 %

22 %

15 %

25 %

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

Silica

Water

Clay

Calcium oxide

30. Generally wooden moulds are made from

Deodar wood

Teak wood

Shishum wood

Ply wood

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31. Pick up the correct statement from the following:

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

All of these

32. Sandstone is a

(i) Sedimentary rock

(ii) Aqueous rock

(iii) Siliceous rock

The correct answer is

Only (i)

Both (i) and (iii)

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

Both (i) and (ii)

33. Cast steel is manufactured by

Bessemer process

Cementation process

Crucible process

Open hearth process

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

2.7

1.5

2.2

1.7

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

90 kg/cm2

75 kg/cm2

100 kg/cm2

120 kg/cm2

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

Trowel

Square

Bolster

Scutch

37. The foliated structure is very common in

Metamorphic rocks

Igneous rocks

Sedimentary rocks

None of these

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

15 %

5 %

35 %

25 %

39. Plastics are compounds of carbon with element

Oxygen

Nitrogen

Hydrogen

All of these

40. Sea sand used in structures causes

All of these

Efflorescence

Dampness

Disintegration

Building Materials MCQs Set-8

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