Building Materials MCQs Set-8

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

Wood work

Both wood work and iron work

None of the above

Iron work

2. Pick up the synthetic resin from the following:

Phenolic resin

Resorcinol resin

All of these

Urea resin

3. Bulking of sand is caused due to

Clay contents

Surface moisture

Viscosity

Air voids

4. The commonly used thinner in oil paints, is

(B) Turpentine

(D) None the these

(A) Naphtha

(C) Both (a) and (b)

5. Cast steel is manufactured by

Crucible process

Open hearth process

Bessemer process

Cementation process

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

Two bricks thick

One brick thick

Half brick thick

One and a half bricks thick

7. Bitumen is generally obtained from

Petroleum product

Synthetic material

Organic material

Coal

8. 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

9. Cross cut saw is used for

Dressing stones

Cutting hard stones

Cutting large blocks of stones

Cutting soft stones

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

35 %

5 %

25 %

15 %

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11. The foliated structure is very common in

Sedimentary rocks

Metamorphic rocks

Igneous rocks

None of these

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

Bolster

Square

Trowel

Scutch

13. Age of a tree may be ascertained by

Number of branches

Circumference of its stem

Radius of its stem

Number of annual rings

14. Which of the following is a mineral?

Quartz

Basalt

Syenite

Granite

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

25 %

22 %

15 %

20 %

16. 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

17. Pick up the correct statement from the following:

Fibrous fillers increase thermal resistance

All of these

Catalysts are added to assist and accelerate the hardening of resin

The fillers are inert materials and they impart strength and hardness

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

Calcium oxide

Clay

Silica

Water

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

1800 kg

1200 kg

2000 kg

1500 kg

20. 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

20 %

15 %

10 %

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

Log

Baulk

Batten

Plank

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

100 kg/cm2

90 kg/cm2

120 kg/cm2

75 kg/cm2

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

Refractory bricks

Under-burnt bricks

First class bricks

Over-burnt bricks

24. Plastics are compounds of carbon with element

Oxygen

Hydrogen

Nitrogen

All of these

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

20 m

10 m

40 m

30 m

26. Addition of pozzolana to ordinary Portland cement increases

Bleeding

Permeability

Heat of hydration

Shrinkage

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

2.2

1.7

1.5

2.7

28. 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 (iv)

(iii) and (iv)

(i) and (ii)

29. Calcination of iron ores is done

By roasting in heaps

To remove moisture

All of these

To remove carbonic acid

30. Generally wooden moulds are made from

Deodar wood

Shishum wood

Teak wood

Ply wood

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31. Glazing of clay products, is done

To improve their appearance

All of these

To protect them from atmospheric effect

To protect them from corrosive action

32. Sea sand used in structures causes

Dampness

Efflorescence

Disintegration

All of these

33. 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)

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

Red lead

Zinc white

White lead

Ferrous oxide

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

The toughness of the stone

The presence of soluble matter of stone

The hardness of the stone

The compressive strength of the stone

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

21 MPa

11.5 MPa

16 MPa

7 MPa

37. 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

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

Argillaceous rocks

Sedimentary rocks

Calcareous rocks

Siliceous rocks

39. Pug mill is used for

Moulding of clay

Preparation of clay

Drying of bricks

Burning of bricks

40. Slate is formed by metamorphic action on

Granite

Sand stone

Shale

Lime stone

Building Materials MCQs Set-8

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