Building Materials MCQs Set-8

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

2000 kg

1500 kg

1800 kg

1200 kg

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)

(ii) and (iii)

(iii) and (iv)

(i) and (ii)

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

Log

Plank

Baulk

Batten

4. The foliated structure is very common in

Igneous rocks

None of these

Sedimentary rocks

Metamorphic rocks

5. Calcination of iron ores is done

To remove moisture

By roasting in heaps

To remove carbonic acid

All of these

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

25 %

22 %

15 %

20 %

7. Generally wooden moulds are made from

Teak wood

Deodar wood

Ply wood

Shishum wood

8. 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

15 %

20 %

10 %

None of these

9. Slate is formed by metamorphic action on

Shale

Lime stone

Granite

Sand stone

10. Cross cut saw is used for

Dressing stones

Cutting hard stones

Cutting large blocks of stones

Cutting soft stones

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

Clay

Calcium oxide

Silica

Water

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

15 %

35 %

25 %

5 %

13. Sea sand used in structures causes

Efflorescence

Dampness

All of these

Disintegration

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

16 MPa

7 MPa

11.5 MPa

21 MPa

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

Calcareous rocks

Sedimentary rocks

Siliceous rocks

Argillaceous rocks

16. Bitumen is generally obtained from

Organic material

Coal

Synthetic material

Petroleum product

17. The commonly used thinner in oil paints, is

(B) Turpentine

(C) Both (a) and (b)

(D) None the these

(A) Naphtha

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

None of the above

Iron work

Both wood work and iron work

Wood work

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

Refractory bricks

Under-burnt bricks

First class bricks

Over-burnt bricks

20. Age of a tree may be ascertained by

Number of annual rings

Circumference of its stem

Number of branches

Radius of its stem

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

40 m

20 m

30 m

10 m

22. The nominal size of the modular brick is

200 mm × 100 mm × 100 mm

200 mm × 200 mm × 100 mm

190 mm × 90 mm × 80 mm

190 mm × 190 mm × 90 mm

23. 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

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

2.2

1.7

2.7

1.5

25. Which of the following is a mineral?

Granite

Basalt

Syenite

Quartz

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

Rapid hardening cement

Low heat cement

Ordinary Portland cement

Sulphate resisting cement

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

Granite is the only igneous rock

Basalt and marble are the only metamorphic rocks

There is no sedimentary rock

Quartz and mica are minerals

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

75 kg/cm2

120 kg/cm2

90 kg/cm2

100 kg/cm2

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

Bolster

Scutch

Trowel

Square

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

One brick thick

Two bricks thick

One and a half bricks thick

Half brick thick

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31. Plastics are compounds of carbon with element

Nitrogen

All of these

Oxygen

Hydrogen

32. Sandstone is a

(i) Sedimentary rock

(ii) Aqueous rock

(iii) Siliceous rock

The correct answer is

Both (i) and (iii)

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

Only (i)

Both (i) and (ii)

33. Cast steel is manufactured by

Cementation process

Open hearth process

Bessemer process

Crucible process

34. Pug mill is used for

Preparation of clay

Drying of bricks

Burning of bricks

Moulding of clay

35. Addition of pozzolana to ordinary Portland cement increases

Bleeding

Shrinkage

Heat of hydration

Permeability

36. Pick up the synthetic resin from the following:

All of these

Urea resin

Resorcinol resin

Phenolic resin

37. Bulking of sand is caused due to

Clay contents

Surface moisture

Viscosity

Air voids

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

White lead

Red lead

Zinc white

Ferrous oxide

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

The hardness of the stone

The compressive strength of the stone

The toughness of the stone

The presence of soluble matter of stone

40. 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

Building Materials MCQs Set-8

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