Building Materials MCQs Set-8

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1. Age of a tree may be ascertained by

Radius of its stem

Number of branches

Circumference of its stem

Number of annual rings

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

2.7

2.2

1.7

1.5

3. Pug mill is used for

Burning of bricks

Moulding of clay

Preparation of clay

Drying of bricks

4. Addition of pozzolana to ordinary Portland cement increases

Permeability

Heat of hydration

Bleeding

Shrinkage

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

Sulphate resisting cement

Ordinary Portland cement

Low heat cement

Rapid hardening cement

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

Baulk

Log

Plank

Batten

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

25 %

20 %

22 %

15 %

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

40 m

20 m

30 m

10 m

9. Sandstone is a

(i) Sedimentary rock

(ii) Aqueous rock

(iii) Siliceous rock

The correct answer is

Both (i) and (ii)

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

Both (i) and (iii)

Only (i)

10. Which of the following is a mineral?

Quartz

Granite

Basalt

Syenite

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

5 %

35 %

25 %

15 %

12. Bitumen is generally obtained from

Petroleum product

Synthetic material

Organic material

Coal

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

Calcium oxide

Clay

Silica

Water

14. Cross cut saw is used for

Cutting soft stones

Cutting large blocks of stones

Cutting hard stones

Dressing stones

15. 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

(iii) and (iv)

(ii) and (iii)

(i) and (ii)

(i) and (iv)

16. Cast steel is manufactured by

Bessemer process

Cementation process

Open hearth process

Crucible process

17. Sea sand used in structures causes

Disintegration

Efflorescence

Dampness

All of these

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

None of the above

Both wood work and iron work

Iron work

Wood work

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

One and a half bricks thick

One brick thick

Two bricks thick

Half brick thick

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

1500 kg

1200 kg

1800 kg

2000 kg

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

First class bricks

Under-burnt bricks

Over-burnt bricks

Refractory bricks

22. The commonly used thinner in oil paints, is

(B) Turpentine

(D) None the these

(A) Naphtha

(C) Both (a) and (b)

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

Argillaceous rocks

Sedimentary rocks

Calcareous rocks

Siliceous rocks

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

75 kg/cm2

120 kg/cm2

100 kg/cm2

90 kg/cm2

25. 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 %

None of these

15 %

10 %

26. Pick up the synthetic resin from the following:

Urea resin

Phenolic resin

Resorcinol resin

All of these

27. The foliated structure is very common in

Sedimentary rocks

Metamorphic rocks

None of these

Igneous rocks

28. The nominal size of the modular brick is

190 mm × 190 mm × 90 mm

200 mm × 200 mm × 100 mm

190 mm × 90 mm × 80 mm

200 mm × 100 mm × 100 mm

29. Slate is formed by metamorphic action on

Sand stone

Lime stone

Shale

Granite

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

Scutch

Trowel

Square

Bolster

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31. Calcination of iron ores is done

To remove carbonic acid

To remove moisture

By roasting in heaps

All of these

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

Quartz and mica are minerals

There is no sedimentary rock

Granite is the only igneous rock

Basalt and marble are the only metamorphic rocks

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

Ferrous oxide

White lead

Red lead

Zinc white

34. Glazing of clay products, is done

To protect them from corrosive action

To improve their appearance

To protect them from atmospheric effect

All of these

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

The toughness of the stone

The compressive strength of the stone

The presence of soluble matter of stone

The hardness of the stone

36. 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

37. Bulking of sand is caused due to

Viscosity

Clay contents

Surface moisture

Air voids

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

21 MPa

7 MPa

11.5 MPa

16 MPa

39. Plastics are compounds of carbon with element

Hydrogen

Oxygen

All of these

Nitrogen

40. Generally wooden moulds are made from

Teak wood

Deodar wood

Shishum wood

Ply wood

Building Materials MCQs Set-8

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