Building Materials MCQs Set-8

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1. Glazing of clay products, is done

To protect them from atmospheric effect

To improve their appearance

All of these

To protect them from corrosive action

2. 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)

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

White lead

Ferrous oxide

Red lead

Zinc white

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

10 m

30 m

20 m

40 m

5. Plastics are compounds of carbon with element

Hydrogen

Oxygen

All of these

Nitrogen

6. Pick up the correct statement from the following:

Fibrous fillers increase thermal resistance

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

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

Argillaceous rocks

Calcareous rocks

Siliceous rocks

Sedimentary rocks

8. Generally wooden moulds are made from

Deodar wood

Shishum wood

Ply wood

Teak wood

9. Sea sand used in structures causes

All of these

Efflorescence

Disintegration

Dampness

10. Pug mill is used for

Moulding of clay

Drying of bricks

Preparation of clay

Burning of bricks

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

90 kg/cm2

120 kg/cm2

75 kg/cm2

100 kg/cm2

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

20 %

15 %

22 %

25 %

13. Pick up the synthetic resin from the following:

Phenolic resin

Resorcinol resin

Urea resin

All of these

14. Bulking of sand is caused due to

Clay contents

Viscosity

Surface moisture

Air voids

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

7 MPa

11.5 MPa

16 MPa

21 MPa

16. 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

15 %

10 %

20 %

None of these

17. Bitumen is generally obtained from

Synthetic material

Petroleum product

Organic material

Coal

18. Calcination of iron ores is done

By roasting in heaps

To remove carbonic acid

All of these

To remove moisture

19. Age of a tree may be ascertained by

Circumference of its stem

Radius of its stem

Number of branches

Number of annual rings

20. Cast steel is manufactured by

Crucible process

Cementation process

Bessemer process

Open hearth process

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21. Cross cut saw is used for

Cutting large blocks of stones

Cutting hard stones

Dressing stones

Cutting soft stones

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

Low heat cement

Rapid hardening cement

Ordinary Portland cement

Sulphate resisting cement

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

Over-burnt bricks

First class bricks

Under-burnt bricks

Refractory bricks

24. Slate is formed by metamorphic action on

Shale

Lime stone

Granite

Sand stone

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

Calcium oxide

Silica

Water

Clay

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

Square

Trowel

Scutch

Bolster

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

One brick thick

One and a half bricks thick

Half brick thick

Two bricks thick

28. Sandstone is a

(i) Sedimentary rock

(ii) Aqueous rock

(iii) Siliceous rock

The correct answer is

Only (i)

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

Both (i) and (ii)

Both (i) and (iii)

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

5 %

35 %

25 %

15 %

30. 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

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

2000 kg

1500 kg

1800 kg

1200 kg

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

2.7

1.5

1.7

2.2

33. The nominal size of the modular brick is

200 mm × 100 mm × 100 mm

200 mm × 200 mm × 100 mm

190 mm × 90 mm × 80 mm

190 mm × 190 mm × 90 mm

34. Addition of pozzolana to ordinary Portland cement increases

Heat of hydration

Shrinkage

Permeability

Bleeding

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

Batten

Log

Baulk

Plank

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

There is no sedimentary rock

Quartz and mica are minerals

Basalt and marble are the only metamorphic rocks

Granite is the only igneous rock

37. Which of the following is a mineral?

Basalt

Quartz

Granite

Syenite

38. The commonly used thinner in oil paints, is

(C) Both (a) and (b)

(D) None the these

(A) Naphtha

(B) Turpentine

39. The foliated structure is very common in

Sedimentary rocks

None of these

Igneous rocks

Metamorphic rocks

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

None of the above

Wood work

Both wood work and iron work

Iron work

Building Materials MCQs Set-8

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