Building Materials MCQs Set-8

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1. Pick up the synthetic resin from the following:

Resorcinol resin

Urea resin

All of these

Phenolic resin

2. Pug mill is used for

Burning of bricks

Moulding of clay

Drying of bricks

Preparation of clay

3. Calcination of iron ores is done

To remove moisture

By roasting in heaps

All of these

To remove carbonic acid

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

Clay

Silica

Calcium oxide

Water

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

Sulphate resisting cement

Low heat cement

Rapid hardening cement

Ordinary Portland cement

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

Two bricks thick

Half brick thick

One brick thick

One and a half bricks thick

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

35 %

5 %

15 %

25 %

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

20 %

25 %

15 %

22 %

9. Generally wooden moulds are made from

Shishum wood

Ply wood

Teak wood

Deodar wood

10. Sandstone is a

(i) Sedimentary rock

(ii) Aqueous rock

(iii) Siliceous rock

The correct answer is

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

Both (i) and (ii)

Both (i) and (iii)

Only (i)

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11. Cross cut saw is used for

Cutting soft stones

Dressing stones

Cutting hard stones

Cutting large blocks of stones

12. Which of the following is a mineral?

Syenite

Quartz

Basalt

Granite

13. The commonly used thinner in oil paints, is

(A) Naphtha

(C) Both (a) and (b)

(B) Turpentine

(D) None the these

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

1.7

2.2

2.7

1.5

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

Under-burnt bricks

Over-burnt bricks

First class bricks

Refractory bricks

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

Iron work

Both wood work and iron work

Wood work

None of the above

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

Sedimentary rocks

Calcareous rocks

Siliceous rocks

Argillaceous rocks

18. 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

10 %

15 %

None of these

20 %

19. Age of a tree may be ascertained by

Number of branches

Circumference of its stem

Radius of its stem

Number of annual rings

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

75 kg/cm2

90 kg/cm2

120 kg/cm2

100 kg/cm2

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

40 m

20 m

10 m

30 m

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

Log

Plank

Batten

Baulk

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

Ferrous oxide

Zinc white

Red lead

White lead

24. 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

25. Bitumen is generally obtained from

Coal

Petroleum product

Organic material

Synthetic material

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

The toughness of the stone

The hardness of the stone

The presence of soluble matter of stone

The compressive strength of the stone

27. Pick up the correct statement from the following:

The fillers are inert materials and they impart strength and hardness

Catalysts are added to assist and accelerate the hardening of resin

All of these

Fibrous fillers increase thermal resistance

28. The foliated structure is very common in

Metamorphic rocks

None of these

Igneous rocks

Sedimentary rocks

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

Square

Trowel

Scutch

Bolster

30. Plastics are compounds of carbon with element

All of these

Nitrogen

Hydrogen

Oxygen

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31. The nominal size of the modular brick is

200 mm × 100 mm × 100 mm

190 mm × 190 mm × 90 mm

190 mm × 90 mm × 80 mm

200 mm × 200 mm × 100 mm

32. Sea sand used in structures causes

Efflorescence

Disintegration

Dampness

All of these

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

Granite is the only igneous rock

There is no sedimentary rock

Quartz and mica are minerals

Basalt and marble are the only metamorphic rocks

34. 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

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

1500 kg

1200 kg

1800 kg

2000 kg

36. Cast steel is manufactured by

Open hearth process

Crucible process

Bessemer process

Cementation process

37. Slate is formed by metamorphic action on

Lime stone

Sand stone

Shale

Granite

38. Addition of pozzolana to ordinary Portland cement increases

Shrinkage

Permeability

Heat of hydration

Bleeding

39. 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

(ii) and (iii)

(i) and (ii)

(iii) and (iv)

(i) and (iv)

40. Bulking of sand is caused due to

Clay contents

Viscosity

Air voids

Surface moisture

Building Materials MCQs Set-8

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