Building Materials MCQs Set-8

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1. Bulking of sand is caused due to

Surface moisture

Viscosity

Clay contents

Air voids

2. Slate is formed by metamorphic action on

Granite

Sand stone

Shale

Lime stone

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

20 %

15 %

25 %

22 %

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

10 %

None of these

15 %

20 %

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

Trowel

Scutch

Square

Bolster

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

Silica

Water

Calcium oxide

Clay

7. Cross cut saw is used for

Cutting hard stones

Cutting soft stones

Cutting large blocks of stones

Dressing stones

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

Under-burnt bricks

Refractory bricks

First class bricks

Over-burnt bricks

9. Sea sand used in structures causes

Efflorescence

Dampness

All of these

Disintegration

10. Pug mill is used for

Burning of bricks

Preparation of clay

Drying of bricks

Moulding of clay

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

The hardness of the stone

The compressive strength of the stone

The toughness of the stone

The presence of soluble matter of stone

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

One and a half bricks thick

One brick thick

Half brick thick

Two bricks thick

13. The commonly used thinner in oil paints, is

(A) Naphtha

(B) Turpentine

(D) None the these

(C) Both (a) and (b)

14. Plastics are compounds of carbon with element

Oxygen

Nitrogen

Hydrogen

All of these

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

100 kg/cm2

90 kg/cm2

75 kg/cm2

120 kg/cm2

16. Bitumen is generally obtained from

Coal

Synthetic material

Organic material

Petroleum product

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

Zinc white

Red lead

White lead

Ferrous oxide

18. Calcination of iron ores is done

To remove moisture

To remove carbonic acid

By roasting in heaps

All of these

19. Which of the following is a mineral?

Quartz

Granite

Basalt

Syenite

20. Sandstone is a

(i) Sedimentary rock

(ii) Aqueous rock

(iii) Siliceous rock

The correct answer is

Both (i) and (ii)

Only (i)

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

Both (i) and (iii)

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

1.5

2.7

2.2

1.7

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

Basalt and marble are the only metamorphic rocks

Quartz and mica are minerals

Granite is the only igneous rock

There is no sedimentary rock

23. The nominal size of the modular brick is

190 mm × 90 mm × 80 mm

200 mm × 100 mm × 100 mm

190 mm × 190 mm × 90 mm

200 mm × 200 mm × 100 mm

24. Addition of pozzolana to ordinary Portland cement increases

Bleeding

Heat of hydration

Permeability

Shrinkage

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

Siliceous rocks

Sedimentary rocks

Argillaceous rocks

Calcareous rocks

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

Iron work

None of the above

Wood work

Both wood work and iron work

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

11.5 MPa

7 MPa

16 MPa

21 MPa

28. Pick up the correct statement from the following:

Fibrous fillers increase thermal resistance

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

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

Rapid hardening cement

Ordinary Portland cement

Low heat cement

Sulphate resisting cement

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

5 %

15 %

25 %

35 %

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

Log

Baulk

Plank

Batten

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

1800 kg

2000 kg

1500 kg

1200 kg

33. Generally wooden moulds are made from

Shishum wood

Teak wood

Ply wood

Deodar wood

34. Age of a tree may be ascertained by

Radius of its stem

Number of annual rings

Number of branches

Circumference of its stem

35. Glazing of clay products, is done

To protect them from atmospheric effect

To improve their appearance

All of these

To protect them from corrosive action

36. Pick up the synthetic resin from the following:

Urea resin

Resorcinol resin

All of these

Phenolic resin

37. 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)

(i) and (iv)

(iii) and (iv)

(ii) and (iii)

38. Cast steel is manufactured by

Crucible process

Bessemer process

Cementation process

Open hearth process

39. The foliated structure is very common in

Igneous rocks

None of these

Sedimentary rocks

Metamorphic rocks

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

20 m

30 m

10 m

40 m

Building Materials MCQs Set-8

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