Building Materials MCQs Set-8

Page 1 of 4

1. The foliated structure is very common in

None of these

Metamorphic rocks

Igneous rocks

Sedimentary rocks

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

One brick thick

Two bricks thick

Half brick thick

One and a half bricks thick

3. 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 %

15 %

10 %

None of these

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

The presence of soluble matter of stone

The toughness of the stone

The compressive strength of the stone

The hardness of the stone

5. Which of the following is a mineral?

Basalt

Quartz

Granite

Syenite

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

Ferrous oxide

White lead

Red lead

Zinc white

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

Sedimentary rocks

Calcareous rocks

Argillaceous rocks

Siliceous rocks

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

22 %

20 %

15 %

25 %

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

16 MPa

21 MPa

11.5 MPa

7 MPa

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

Over-burnt bricks

Under-burnt bricks

First class bricks

Refractory bricks

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

Both wood work and iron work

Iron work

Wood work

None of the above

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

25 %

15 %

35 %

5 %

13. Cast steel is manufactured by

Crucible process

Bessemer process

Open hearth process

Cementation process

14. Plastics are compounds of carbon with element

Oxygen

All of these

Hydrogen

Nitrogen

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

1.7

1.5

2.7

2.2

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

100 kg/cm2

120 kg/cm2

75 kg/cm2

90 kg/cm2

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

40 m

10 m

30 m

20 m

18. 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

Quartz and mica are minerals

Granite is the only igneous rock

19. Calcination of iron ores is done

By roasting in heaps

All of these

To remove moisture

To remove carbonic acid

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

Water

Clay

Silica

Calcium oxide

Page 3 of 4

21. Pick up the synthetic resin from the following:

All of these

Resorcinol resin

Phenolic resin

Urea resin

22. The nominal size of the modular brick is

190 mm × 90 mm × 80 mm

200 mm × 200 mm × 100 mm

200 mm × 100 mm × 100 mm

190 mm × 190 mm × 90 mm

23. Pug mill is used for

Moulding of clay

Drying of bricks

Burning of bricks

Preparation of clay

24. Sea sand used in structures causes

Disintegration

All of these

Efflorescence

Dampness

25. Slate is formed by metamorphic action on

Sand stone

Lime stone

Shale

Granite

26. 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

27. Addition of pozzolana to ordinary Portland cement increases

Bleeding

Heat of hydration

Permeability

Shrinkage

28. Generally wooden moulds are made from

Deodar wood

Ply wood

Teak wood

Shishum wood

29. 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 (iii)

Both (i) and (ii)

30. Pick up the correct statement from the following:

Fibrous fillers increase thermal resistance

Catalysts are added to assist and accelerate the hardening of resin

The fillers are inert materials and they impart strength and hardness

All of these

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31. Age of a tree may be ascertained by

Radius of its stem

Number of branches

Number of annual rings

Circumference of its stem

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

Trowel

Scutch

Bolster

Square

33. 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

(ii) and (iii)

(iii) and (iv)

(i) and (ii)

(i) and (iv)

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

1500 kg

1200 kg

2000 kg

1800 kg

35. Glazing of clay products, is done

All of these

To improve their appearance

To protect them from atmospheric effect

To protect them from corrosive action

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

Plank

Batten

Log

Baulk

37. Bulking of sand is caused due to

Clay contents

Air voids

Surface moisture

Viscosity

38. Cross cut saw is used for

Dressing stones

Cutting hard stones

Cutting large blocks of stones

Cutting soft stones

39. Bitumen is generally obtained from

Organic material

Synthetic material

Petroleum product

Coal

40. The commonly used thinner in oil paints, is

(A) Naphtha

(B) Turpentine

(C) Both (a) and (b)

(D) None the these

Building Materials MCQs Set-8

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