Building Materials MCQs Set-8

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

The compressive strength of the stone

The hardness of the stone

The presence of soluble matter of stone

The toughness of the stone

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

30 m

20 m

10 m

40 m

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

21 MPa

7 MPa

11.5 MPa

16 MPa

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

Trowel

Scutch

Square

Bolster

5. Generally wooden moulds are made from

Teak wood

Ply wood

Shishum wood

Deodar wood

6. Addition of pozzolana to ordinary Portland cement increases

Bleeding

Heat of hydration

Shrinkage

Permeability

7. Calcination of iron ores is done

To remove carbonic acid

To remove moisture

By roasting in heaps

All of these

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

1.5

2.2

2.7

1.7

9. Cast steel is manufactured by

Bessemer process

Cementation process

Open hearth process

Crucible process

10. Bitumen is generally obtained from

Synthetic material

Coal

Organic material

Petroleum product

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

1200 kg

2000 kg

1500 kg

1800 kg

12. 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

All of these

Fibrous fillers increase thermal resistance

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

Batten

Baulk

Log

Plank

14. Pick up the synthetic resin from the following:

Phenolic resin

All of these

Urea resin

Resorcinol resin

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

First class bricks

Refractory bricks

Under-burnt bricks

Over-burnt bricks

16. Cross cut saw is used for

Cutting soft stones

Cutting hard stones

Cutting large blocks of stones

Dressing stones

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

5 %

35 %

25 %

15 %

18. Bulking of sand is caused due to

Surface moisture

Viscosity

Clay contents

Air voids

19. Slate is formed by metamorphic action on

Sand stone

Granite

Lime stone

Shale

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

Sedimentary rocks

Argillaceous rocks

Calcareous rocks

Siliceous rocks

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21. 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

22. The nominal size of the modular brick is

200 mm × 200 mm × 100 mm

190 mm × 90 mm × 80 mm

200 mm × 100 mm × 100 mm

190 mm × 190 mm × 90 mm

23. 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)

(ii) and (iii)

(iii) and (iv)

24. The commonly used thinner in oil paints, is

(D) None the these

(B) Turpentine

(A) Naphtha

(C) Both (a) and (b)

25. Sea sand used in structures causes

Efflorescence

Disintegration

Dampness

All of these

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

Water

Calcium oxide

Silica

Clay

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

None of the above

Iron work

Wood work

Both wood work and iron work

28. Plastics are compounds of carbon with element

All of these

Nitrogen

Oxygen

Hydrogen

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

One and a half bricks thick

Half brick thick

Two bricks thick

One brick thick

30. Glazing of clay products, is done

To improve their appearance

All of these

To protect them from corrosive action

To protect them from atmospheric effect

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

75 kg/cm2

90 kg/cm2

120 kg/cm2

100 kg/cm2

32. Pug mill is used for

Burning of bricks

Preparation of clay

Drying of bricks

Moulding of clay

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

20 %

15 %

25 %

22 %

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

Ferrous oxide

White lead

Red lead

Zinc white

35. Which of the following is a mineral?

Granite

Basalt

Quartz

Syenite

36. 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 %

10 %

15 %

None of these

37. The foliated structure is very common in

None of these

Sedimentary rocks

Metamorphic rocks

Igneous rocks

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

Low heat cement

Sulphate resisting cement

Rapid hardening cement

Ordinary Portland cement

39. 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 (ii)

Both (i) and (iii)

40. Age of a tree may be ascertained by

Radius of its stem

Circumference of its stem

Number of branches

Number of annual rings

Building Materials MCQs Set-8

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