Building Materials MCQs Set-8

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1. 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

(iii) and (iv)

(i) and (iv)

(ii) and (iii)

(i) and (ii)

2. Which of the following is a mineral?

Basalt

Syenite

Quartz

Granite

3. The commonly used thinner in oil paints, is

(D) None the these

(C) Both (a) and (b)

(A) Naphtha

(B) Turpentine

4. 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

10 %

15 %

20 %

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

Scutch

Trowel

Square

Bolster

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

15 %

25 %

20 %

22 %

7. Bulking of sand is caused due to

Surface moisture

Clay contents

Viscosity

Air voids

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

75 kg/cm2

120 kg/cm2

100 kg/cm2

90 kg/cm2

9. Pick up the correct statement from the following:

The fillers are inert materials and they impart strength and hardness

All of these

Catalysts are added to assist and accelerate the hardening of resin

Fibrous fillers increase thermal resistance

10. Age of a tree may be ascertained by

Radius of its stem

Circumference of its stem

Number of annual rings

Number of branches

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

Quartz and mica are minerals

Granite is the only igneous rock

There is no sedimentary rock

Basalt and marble are the only metamorphic rocks

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

Iron work

None of the above

Wood work

Both wood work and iron work

13. The foliated structure is very common in

Sedimentary rocks

Igneous rocks

Metamorphic rocks

None of these

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

The toughness of the stone

The hardness of the stone

The compressive strength of the stone

The presence of soluble matter of stone

15. Sea sand used in structures causes

All of these

Disintegration

Efflorescence

Dampness

16. Sandstone is a

(i) Sedimentary rock

(ii) Aqueous rock

(iii) Siliceous rock

The correct answer is

Both (i) and (iii)

Both (i) and (ii)

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

Only (i)

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

Refractory bricks

Over-burnt bricks

Under-burnt bricks

First class bricks

18. Addition of pozzolana to ordinary Portland cement increases

Shrinkage

Permeability

Heat of hydration

Bleeding

19. Pug mill is used for

Burning of bricks

Preparation of clay

Drying of bricks

Moulding of clay

20. The nominal size of the modular brick is

200 mm × 200 mm × 100 mm

190 mm × 90 mm × 80 mm

190 mm × 190 mm × 90 mm

200 mm × 100 mm × 100 mm

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21. Slate is formed by metamorphic action on

Lime stone

Shale

Granite

Sand stone

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

Siliceous rocks

Calcareous rocks

Sedimentary rocks

Argillaceous rocks

23. Cast steel is manufactured by

Open hearth process

Cementation process

Crucible process

Bessemer process

24. Cross cut saw is used for

Dressing stones

Cutting hard stones

Cutting soft stones

Cutting large blocks of stones

25. Bitumen is generally obtained from

Synthetic material

Coal

Organic material

Petroleum product

26. Plastics are compounds of carbon with element

All of these

Hydrogen

Nitrogen

Oxygen

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

1800 kg

1500 kg

2000 kg

1200 kg

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

35 %

25 %

15 %

5 %

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

White lead

Red lead

Zinc white

Ferrous oxide

30. Pick up the synthetic resin from the following:

Resorcinol resin

All of these

Urea resin

Phenolic resin

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31. 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

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

Ordinary Portland cement

Sulphate resisting cement

Rapid hardening cement

Low heat cement

33. Generally wooden moulds are made from

Deodar wood

Ply wood

Shishum wood

Teak wood

34. Glazing of clay products, is done

To protect them from corrosive action

To protect them from atmospheric effect

All of these

To improve their appearance

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

40 m

10 m

20 m

30 m

36. Calcination of iron ores is done

All of these

To remove carbonic acid

By roasting in heaps

To remove moisture

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

1.7

2.7

1.5

2.2

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

Clay

Silica

Calcium oxide

Water

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

One brick thick

One and a half bricks thick

Two bricks thick

Half brick thick

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

Batten

Plank

Baulk

Log

Building Materials MCQs Set-8

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