Building Materials MCQs Set-8

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1. 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 %

15 %

None of these

20 %

2. 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

3. Slate is formed by metamorphic action on

Granite

Shale

Lime stone

Sand stone

4. Age of a tree may be ascertained by

Radius of its stem

Number of branches

Circumference of its stem

Number of annual rings

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

Plank

Batten

Baulk

Log

6. Bitumen is generally obtained from

Synthetic material

Coal

Petroleum product

Organic material

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

90 kg/cm2

75 kg/cm2

120 kg/cm2

100 kg/cm2

8. Which of the following is a mineral?

Granite

Syenite

Basalt

Quartz

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

1.5

2.7

2.2

1.7

10. The foliated structure is very common in

None of these

Igneous rocks

Metamorphic rocks

Sedimentary rocks

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11. Pick up the synthetic resin from the following:

Resorcinol resin

All of these

Phenolic resin

Urea resin

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

None of the above

Wood work

Both wood work and iron work

Iron work

13. 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)

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

Clay

Calcium oxide

Water

Silica

15. Cast steel is manufactured by

Crucible process

Open hearth process

Bessemer process

Cementation process

16. Calcination of iron ores is done

To remove carbonic acid

All of these

By roasting in heaps

To remove moisture

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

Over-burnt bricks

Under-burnt bricks

Refractory bricks

First class bricks

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

Sedimentary rocks

Calcareous rocks

Siliceous rocks

Argillaceous rocks

19. Glazing of clay products, is done

To protect them from corrosive action

To protect them from atmospheric effect

To improve their appearance

All of these

20. Pick up the correct statement from the following:

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

Fibrous fillers increase thermal resistance

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21. Sea sand used in structures causes

Efflorescence

All of these

Dampness

Disintegration

22. Addition of pozzolana to ordinary Portland cement increases

Bleeding

Heat of hydration

Shrinkage

Permeability

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

One and a half bricks thick

Two bricks thick

One brick thick

Half brick thick

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

10 m

20 m

30 m

40 m

25. The commonly used thinner in oil paints, is

(A) Naphtha

(B) Turpentine

(C) Both (a) and (b)

(D) None the these

26. Bulking of sand is caused due to

Surface moisture

Air voids

Clay contents

Viscosity

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

20 %

22 %

25 %

15 %

28. The nominal size of the modular brick is

200 mm × 200 mm × 100 mm

200 mm × 100 mm × 100 mm

190 mm × 190 mm × 90 mm

190 mm × 90 mm × 80 mm

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

Rapid hardening cement

Sulphate resisting cement

Ordinary Portland cement

Low heat cement

30. 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

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31. Plastics are compounds of carbon with element

Nitrogen

Oxygen

All of these

Hydrogen

32. Generally wooden moulds are made from

Ply wood

Teak wood

Shishum wood

Deodar wood

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

Trowel

Square

Bolster

Scutch

34. Cross cut saw is used for

Cutting hard stones

Cutting soft stones

Dressing stones

Cutting large blocks of stones

35. Pug mill is used for

Drying of bricks

Preparation of clay

Burning of bricks

Moulding of clay

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

15 %

35 %

5 %

25 %

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

1200 kg

2000 kg

1800 kg

1500 kg

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

Zinc white

Red lead

Ferrous oxide

White lead

39. 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)

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

The hardness of the stone

The presence of soluble matter of stone

The compressive strength of the stone

The toughness of the stone

Building Materials MCQs Set-8

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