Building Materials MCQs Set-8

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

15 %

20 %

22 %

25 %

2. Calcination of iron ores is done

All of these

To remove carbonic acid

By roasting in heaps

To remove moisture

3. Sea sand used in structures causes

Efflorescence

All of these

Disintegration

Dampness

4. The nominal size of the modular brick is

200 mm × 200 mm × 100 mm

190 mm × 190 mm × 90 mm

190 mm × 90 mm × 80 mm

200 mm × 100 mm × 100 mm

5. The commonly used thinner in oil paints, is

(B) Turpentine

(C) Both (a) and (b)

(D) None the these

(A) Naphtha

6. Slate is formed by metamorphic action on

Lime stone

Sand stone

Granite

Shale

7. 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 (ii)

(ii) and (iii)

(iii) and (iv)

(i) and (iv)

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

25 %

5 %

15 %

35 %

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

White lead

Red lead

Ferrous oxide

Zinc white

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

Silica

Water

Calcium oxide

Clay

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

1200 kg

1800 kg

2000 kg

1500 kg

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

Two bricks thick

One and a half bricks thick

Half brick thick

One brick thick

13. Bulking of sand is caused due to

Clay contents

Air voids

Surface moisture

Viscosity

14. Pug mill is used for

Drying of bricks

Moulding of clay

Burning of bricks

Preparation of clay

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

90 kg/cm2

75 kg/cm2

120 kg/cm2

100 kg/cm2

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

20 m

40 m

10 m

30 m

17. Plastics are compounds of carbon with element

Hydrogen

Nitrogen

Oxygen

All of these

18. 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

19. 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

Basalt and marble are the only metamorphic rocks

Granite is the only igneous rock

20. Addition of pozzolana to ordinary Portland cement increases

Shrinkage

Bleeding

Permeability

Heat of hydration

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21. Which of the following is a mineral?

Quartz

Basalt

Granite

Syenite

22. Pick up the correct statement from the following:

The fillers are inert materials and they impart strength and hardness

All of these

Fibrous fillers increase thermal resistance

Catalysts are added to assist and accelerate the hardening of resin

23. Generally wooden moulds are made from

Deodar wood

Ply wood

Teak wood

Shishum wood

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

Iron work

Wood work

Both wood work and iron work

None of the above

25. Age of a tree may be ascertained by

Number of branches

Circumference of its stem

Radius of its stem

Number of annual rings

26. 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

20 %

15 %

10 %

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

Square

Scutch

Bolster

Trowel

28. The foliated structure is very common in

Metamorphic rocks

Igneous rocks

None of these

Sedimentary rocks

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

The hardness of the stone

The toughness of the stone

The compressive strength of the stone

The presence of soluble matter of stone

30. Pick up the synthetic resin from the following:

Resorcinol resin

Phenolic resin

All of these

Urea resin

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

Siliceous rocks

Calcareous rocks

Sedimentary rocks

Argillaceous rocks

32. Bitumen is generally obtained from

Synthetic material

Petroleum product

Coal

Organic material

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

2.7

1.5

2.2

1.7

34. Sandstone is a

(i) Sedimentary rock

(ii) Aqueous rock

(iii) Siliceous rock

The correct answer is

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

Both (i) and (iii)

Both (i) and (ii)

Only (i)

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

First class bricks

Refractory bricks

Under-burnt bricks

Over-burnt bricks

36. Cross cut saw is used for

Cutting hard stones

Cutting soft stones

Dressing stones

Cutting large blocks of stones

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

21 MPa

11.5 MPa

16 MPa

7 MPa

38. Cast steel is manufactured by

Cementation process

Open hearth process

Bessemer process

Crucible process

39. Glazing of clay products, is done

To protect them from atmospheric effect

To protect them from corrosive action

To improve their appearance

All of these

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

Log

Baulk

Batten

Plank

Building Materials MCQs Set-8

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