Building Materials MCQs Set-8

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

Ferrous oxide

Red lead

Zinc white

White lead

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

Two bricks thick

One and a half bricks thick

One brick thick

Half brick thick

3. The commonly used thinner in oil paints, is

(C) Both (a) and (b)

(A) Naphtha

(D) None the these

(B) Turpentine

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

100 kg/cm2

120 kg/cm2

90 kg/cm2

75 kg/cm2

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

Sulphate resisting cement

Rapid hardening cement

Low heat cement

Ordinary Portland cement

6. Generally wooden moulds are made from

Deodar wood

Ply wood

Teak wood

Shishum wood

7. Age of a tree may be ascertained by

Radius of its stem

Number of annual rings

Number of branches

Circumference of its stem

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

Plank

Log

Batten

Baulk

9. 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)

10. Cross cut saw is used for

Cutting large blocks of stones

Cutting hard stones

Cutting soft stones

Dressing stones

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

2.2

1.7

1.5

2.7

12. The foliated structure is very common in

Sedimentary rocks

Metamorphic rocks

Igneous rocks

None of these

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)

(ii) and (iii)

(i) and (ii)

(iii) and (iv)

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

20 m

30 m

10 m

40 m

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

Calcareous rocks

Argillaceous rocks

Sedimentary rocks

Siliceous rocks

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

Trowel

Scutch

Bolster

Square

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

The presence of soluble matter of stone

The compressive strength of the stone

The hardness of the stone

The toughness of the stone

18. Plastics are compounds of carbon with element

Oxygen

Nitrogen

All of these

Hydrogen

19. 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

None of these

15 %

10 %

20 %

20. Pick up the correct statement from the following:

Catalysts are added to assist and accelerate the hardening of resin

The fillers are inert materials and they impart strength and hardness

Fibrous fillers increase thermal resistance

All of these

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

22 %

20 %

15 %

25 %

22. Pick up the synthetic resin from the following:

Urea resin

Phenolic resin

Resorcinol resin

All of these

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

2000 kg

1200 kg

1800 kg

1500 kg

24. Which of the following is a mineral?

Granite

Syenite

Basalt

Quartz

25. Pug mill is used for

Moulding of clay

Drying of bricks

Preparation of clay

Burning of bricks

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

7 MPa

11.5 MPa

21 MPa

16 MPa

27. Bitumen is generally obtained from

Organic material

Petroleum product

Synthetic material

Coal

28. Glazing of clay products, is done

To protect them from atmospheric effect

To protect them from corrosive action

All of these

To improve their appearance

29. 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

30. 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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31. Cast steel is manufactured by

Crucible process

Cementation process

Bessemer process

Open hearth process

32. Calcination of iron ores is done

To remove carbonic acid

By roasting in heaps

All of these

To remove moisture

33. Addition of pozzolana to ordinary Portland cement increases

Heat of hydration

Permeability

Shrinkage

Bleeding

34. Bulking of sand is caused due to

Clay contents

Viscosity

Air voids

Surface moisture

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

Over-burnt bricks

Under-burnt bricks

Refractory bricks

First class bricks

36. Sea sand used in structures causes

Disintegration

All of these

Dampness

Efflorescence

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

Clay

Silica

Calcium oxide

Water

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

15 %

35 %

25 %

5 %

39. 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

40. Slate is formed by metamorphic action on

Shale

Sand stone

Granite

Lime stone

Building Materials MCQs Set-8

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