Building Materials MCQs Set-8

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1. Glazing of clay products, is done

All of these

To protect them from atmospheric effect

To improve their appearance

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)

(i) and (ii)

(ii) and (iii)

3. Addition of pozzolana to ordinary Portland cement increases

Bleeding

Heat of hydration

Shrinkage

Permeability

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

11.5 MPa

21 MPa

16 MPa

7 MPa

5. The commonly used thinner in oil paints, is

(B) Turpentine

(D) None the these

(A) Naphtha

(C) Both (a) and (b)

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

Sulphate resisting cement

Low heat cement

Ordinary Portland cement

Rapid hardening cement

7. Bitumen is generally obtained from

Coal

Synthetic material

Petroleum product

Organic material

8. Generally wooden moulds are made from

Deodar wood

Teak wood

Ply wood

Shishum wood

9. Calcination of iron ores is done

By roasting in heaps

To remove moisture

All of these

To remove carbonic acid

10. 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

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

1.7

1.5

2.7

2.2

12. Plastics are compounds of carbon with element

Nitrogen

Hydrogen

All of these

Oxygen

13. Pug mill is used for

Moulding of clay

Burning of bricks

Preparation of clay

Drying of bricks

14. The foliated structure is very common in

None of these

Igneous rocks

Metamorphic rocks

Sedimentary rocks

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

40 m

20 m

30 m

10 m

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

Two bricks thick

One and a half bricks thick

Half brick thick

One brick thick

17. Age of a tree may be ascertained by

Radius of its stem

Circumference of its stem

Number of branches

Number of annual rings

18. Cast steel is manufactured by

Open hearth process

Crucible process

Cementation process

Bessemer process

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

25 %

22 %

20 %

15 %

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

25 %

15 %

35 %

5 %

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

100 kg/cm2

75 kg/cm2

120 kg/cm2

90 kg/cm2

22. Bulking of sand is caused due to

Air voids

Clay contents

Surface moisture

Viscosity

23. Pick up the correct statement from the following:

Fibrous fillers increase thermal resistance

All of these

Catalysts are added to assist and accelerate the hardening of resin

The fillers are inert materials and they impart strength and hardness

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

2000 kg

1800 kg

1200 kg

1500 kg

25. Sea sand used in structures causes

Efflorescence

Disintegration

All of these

Dampness

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

Scutch

Square

Bolster

Trowel

27. Cross cut saw is used for

Cutting soft stones

Cutting hard stones

Cutting large blocks of stones

Dressing stones

28. Slate is formed by metamorphic action on

Shale

Sand stone

Granite

Lime stone

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

First class bricks

Under-burnt bricks

Over-burnt bricks

Refractory bricks

30. 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)

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31. Pick up the synthetic resin from the following:

Phenolic resin

All of these

Resorcinol resin

Urea resin

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

Wood work

Both wood work and iron work

Iron work

None of the above

33. Which of the following is a mineral?

Syenite

Quartz

Granite

Basalt

34. 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 %

None of these

15 %

20 %

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

Quartz and mica are minerals

Granite is the only igneous rock

Basalt and marble are the only metamorphic rocks

There is no sedimentary rock

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

Ferrous oxide

White lead

Red lead

Zinc white

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

Argillaceous rocks

Sedimentary rocks

Calcareous rocks

Siliceous rocks

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

Log

Batten

Plank

Baulk

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

Water

Silica

Calcium oxide

Clay

40. The nominal size of the modular brick is

190 mm × 90 mm × 80 mm

200 mm × 100 mm × 100 mm

190 mm × 190 mm × 90 mm

200 mm × 200 mm × 100 mm

Building Materials MCQs Set-8

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