Building Materials MCQs Set-8

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1. Slate is formed by metamorphic action on

Sand stone

Granite

Shale

Lime stone

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

Bolster

Square

Scutch

Trowel

3. Calcination of iron ores is done

All of these

To remove carbonic acid

To remove moisture

By roasting in heaps

4. Cross cut saw is used for

Cutting soft stones

Cutting hard stones

Dressing stones

Cutting large blocks of stones

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

2.7

1.7

2.2

1.5

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

15 %

25 %

5 %

35 %

7. Glazing of clay products, is done

All of these

To protect them from corrosive action

To improve their appearance

To protect them from atmospheric effect

8. 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

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

21 MPa

11.5 MPa

7 MPa

16 MPa

10. 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)

(ii) and (iii)

(i) and (ii)

(i) and (iv)

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

Iron work

Both wood work and iron work

Wood work

None of the above

12. Sea sand used in structures causes

All of these

Dampness

Efflorescence

Disintegration

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

25 %

15 %

22 %

20 %

14. Pick up the correct statement from the following:

Fibrous fillers increase thermal resistance

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

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

Batten

Baulk

Plank

Log

16. The foliated structure is very common in

Metamorphic rocks

Sedimentary rocks

Igneous rocks

None of these

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

The compressive strength of the stone

The presence of soluble matter of stone

The hardness of the stone

The toughness of the stone

18. Bitumen is generally obtained from

Petroleum product

Organic material

Synthetic material

Coal

19. The nominal size of the modular brick is

200 mm × 100 mm × 100 mm

190 mm × 90 mm × 80 mm

190 mm × 190 mm × 90 mm

200 mm × 200 mm × 100 mm

20. Addition of pozzolana to ordinary Portland cement increases

Permeability

Heat of hydration

Bleeding

Shrinkage

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

90 kg/cm2

75 kg/cm2

120 kg/cm2

100 kg/cm2

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

40 m

10 m

20 m

30 m

23. Pick up the synthetic resin from the following:

Phenolic resin

Resorcinol resin

Urea resin

All of these

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

Red lead

Zinc white

White lead

Ferrous oxide

25. Sandstone is a

(i) Sedimentary rock

(ii) Aqueous rock

(iii) Siliceous rock

The correct answer is

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

Only (i)

Both (i) and (iii)

Both (i) and (ii)

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

Low heat cement

Rapid hardening cement

Ordinary Portland cement

Sulphate resisting cement

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

Under-burnt bricks

First class bricks

Over-burnt bricks

Refractory bricks

28. Bulking of sand is caused due to

Air voids

Clay contents

Viscosity

Surface moisture

29. Which of the following is a mineral?

Granite

Quartz

Basalt

Syenite

30. 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

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31. Cast steel is manufactured by

Open hearth process

Bessemer process

Cementation process

Crucible process

32. 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 %

33. Plastics are compounds of carbon with element

Nitrogen

Oxygen

Hydrogen

All of these

34. Pug mill is used for

Preparation of clay

Burning of bricks

Drying of bricks

Moulding of clay

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

Calcareous rocks

Sedimentary rocks

Argillaceous rocks

Siliceous rocks

36. Age of a tree may be ascertained by

Radius of its stem

Number of annual rings

Number of branches

Circumference of its stem

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

Quartz and mica are minerals

Basalt and marble are the only metamorphic rocks

Granite is the only igneous rock

There is no sedimentary rock

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

Clay

Water

Silica

Calcium oxide

39. The commonly used thinner in oil paints, is

(D) None the these

(B) Turpentine

(A) Naphtha

(C) Both (a) and (b)

40. Generally wooden moulds are made from

Deodar wood

Shishum wood

Teak wood

Ply wood

Building Materials MCQs Set-8

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