Building Materials MCQs Set-8

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

15 %

35 %

25 %

5 %

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

The toughness of the stone

The presence of soluble matter of stone

The hardness of the stone

The compressive strength of the stone

3. 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

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

2.2

1.5

2.7

1.7

5. Pick up the correct statement from the following:

Catalysts are added to assist and accelerate the hardening of resin

Fibrous fillers increase thermal resistance

All of these

The fillers are inert materials and they impart strength and hardness

6. Addition of pozzolana to ordinary Portland cement increases

Permeability

Shrinkage

Bleeding

Heat of hydration

7. Calcination of iron ores is done

To remove carbonic acid

All of these

To remove moisture

By roasting in heaps

8. Sea sand used in structures causes

All of these

Efflorescence

Dampness

Disintegration

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

25 %

22 %

15 %

20 %

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

Wood work

Both wood work and iron work

None of the above

Iron work

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11. Age of a tree may be ascertained by

Number of annual rings

Number of branches

Circumference of its stem

Radius of its stem

12. Bulking of sand is caused due to

Air voids

Viscosity

Surface moisture

Clay contents

13. Generally wooden moulds are made from

Ply wood

Deodar wood

Shishum wood

Teak wood

14. Bitumen is generally obtained from

Coal

Petroleum product

Organic material

Synthetic material

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

30 m

40 m

10 m

20 m

16. Plastics are compounds of carbon with element

Nitrogen

Hydrogen

Oxygen

All of these

17. 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)

(i) and (ii)

(iii) and (iv)

(ii) and (iii)

18. The commonly used thinner in oil paints, is

(D) None the these

(B) Turpentine

(C) Both (a) and (b)

(A) Naphtha

19. Pick up the synthetic resin from the following:

All of these

Resorcinol resin

Phenolic resin

Urea resin

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

Ferrous oxide

White lead

Red lead

Zinc white

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21. Cast steel is manufactured by

Crucible process

Cementation process

Bessemer process

Open hearth process

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

Silica

Calcium oxide

Clay

Water

23. The nominal size of the modular brick is

200 mm × 200 mm × 100 mm

200 mm × 100 mm × 100 mm

190 mm × 90 mm × 80 mm

190 mm × 190 mm × 90 mm

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

Batten

Baulk

Log

Plank

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

Argillaceous rocks

Siliceous rocks

Sedimentary rocks

Calcareous rocks

26. Which of the following is a mineral?

Quartz

Granite

Syenite

Basalt

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

90 kg/cm2

120 kg/cm2

75 kg/cm2

100 kg/cm2

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

1200 kg

1500 kg

1800 kg

2000 kg

29. Slate is formed by metamorphic action on

Shale

Sand stone

Granite

Lime stone

30. Pug mill is used for

Burning of bricks

Moulding of clay

Preparation of clay

Drying of bricks

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31. 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

20 %

15 %

32. Cross cut saw is used for

Cutting large blocks of stones

Dressing stones

Cutting hard stones

Cutting soft stones

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

7 MPa

21 MPa

16 MPa

11.5 MPa

34. Sandstone is a

(i) Sedimentary rock

(ii) Aqueous rock

(iii) Siliceous rock

The correct answer is

Only (i)

Both (i) and (ii)

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

Both (i) and (iii)

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

Refractory bricks

First class bricks

Over-burnt bricks

Under-burnt bricks

36. The foliated structure is very common in

Metamorphic rocks

Igneous rocks

Sedimentary rocks

None of these

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

One and a half bricks thick

Half brick thick

One brick thick

Two bricks thick

38. 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

There is no sedimentary rock

Granite is the only igneous rock

Quartz and mica are minerals

39. 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

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

Scutch

Trowel

Square

Bolster

Building Materials MCQs Set-8

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