Building Materials MCQs Set-7

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1. Pick up the correct statement from the following:

Alexander Parkes, a Scottish chemist prepared a hard material by mixing camphor and alcohol with nitro cellulose and called it, as Parkesite

Pollark, an Austrian scientist prepared a substance from urea and formaldehyde and called it Plastic

Dr. L. Bakeland, a Belgian scientist prepared a product known as Bakelite

All of these

2. Spalling hammer is used for

Breaking small projection of stones

Carving of stones

Driving wooden headed chisels

Rough dressing of stones

3. Which of the following sedimentary rocks changes into quartzite by metamorphic action?

Shale

Gypsum

Sand stone

Lime stone

4. The internal size of mould used in brick preparation is

None of the above

Smaller than the size of a fully burnt brick

Equal to the size of a fully burnt brick

Greater than the size of a fully burnt brick

5. The slenderness ratio for masonry walls should not be more than

40

30

10

20

6. Quick lime is

(i) Slow in setting

(ii) Rapid in slacking

(iii) Good in strength

The correct answer is

Only (i)

Only (ii)

Both (ii) and (iii)

Both (i) and (ii)

7. Compared to mild steel, cast iron has

(i) High compressive strength

(ii) High tensile strength

(iii) Low compressive strength

(iv) Low tensile strength

The correct answer is

(iii) and (iv)

(i)and(iv)

(ii) and (iii)

(i) and (ii)

8. Good quality stones must

Be free from clay

Resist action of acids

All the above

Be durable

9. For the manufacture of Portland cement, the proportions of raw materials used, are

Lime 63% ; silica 22% ; other ingredients 15%

Silica 70% ; lime 20% ; other ingredients 10%

Silica 40% ; lime 40% ; other ingredients 20%

Lime 22% ; silica 63% ; other ingredients 15%

10. Specific gravity for most of the building stones lies between

1.5 to 2.0

3.0 to 3.5

2.5 to 3.0

2.0 to 2.5

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11. According to IS 399-1963, the weight of the timber is specified at

8% moisture content

12% moisture content

10% moisture content

14% moisture content

12. The stone suitable for rubble masonry should be.

Hard

Tough

Light

Heavy

13. Pick up the correct statement from the following:

In Siemens process, the impurities of pig iron are oxidized by the oxygen of the ore

In open-hearth process, the furnace heats the steel

All the above

In basic Bessemer process, the steel heats the converter

14. With increase in moisture content, the bulking of sand

First increases to a certain maximum value and then decreases

Increases

Decreases

First decreases to a certain minimum value and then increases

15. In the method of condensation polymerization,

The reaction proceeds with an evolution of ammonia

The reaction proceeds with an evolution of hydrogen chloride

Low-molecular substances are removed from the high molecular substance

All of these

16. Index number expressing the relative sizes of both coarse and fine aggregates, is called

None of these

Grading of aggregates

Proportioning of aggregates

Fineness modulus

17. Shingle is

Crushed granite

Air weathered rock

Decomposed laterite

Water bound pebbles

18. Plywood is made by bonding together thin layers of wood in such a way that the angle between grains of any layer to grains of adjacent layers is

45°

90°

0°

30°

19. In a mortar, the binding material is

Cinder

Sand

Cement

Surkhi (brick-dust)

20. The vehicle used in case of enamel paints is usually

Linseed oil

None of these

Varnish

Water

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21. Lime putty

Can be used only upto three days

Is made by adding lime to water

All of these

Is made from hydraulic lime

22.

Proper amount of entrained air in concrete results in

(i) Better workability (ii) Better resistance to freezing and thawing (iii) Lesser workability (iv) Less resistance to freezing and thawing The correct answer is

(iii) and (iv)

(ii) and (iii)

(i) and (iv)

(i) and (ii)

23. A good building stone should not absorb water more than

10 %

15 %

20 %

5 %

24. Percentage of silica in a good brick earth lies between

5 to 10 %

20 to 30 %

70 to 80 %

50 to 60 %

25. Sand stone is

Volcanic rock

Sedimentary rock

Metamorphic rock

Igneous rock

26. Pick up the correct statement from the following:

All of these

Styrene resin is produced from ethylene which is made from petroleum

Styrene resin transmits ultraviolet waves of light

Styrene resin is light in weight

27. The age of a tree can be known by examining

Annular rings

Heart wood

Cambium layer

Medullary rays

28. Initial setting time of cement for asbestos cement products should be not less than

90 minutes

75 minutes

50 minutes

30 minutes

29. Pick up the correct statement from the following: Method of sawing timber

All of these

Cut out of quarter logs, parallel to the medullary rays and perpendicular to annual rings, is known as radial sawing

Tangentially to annual rings, is known as tangential method

In four quarters such that each board cuts annual rings at angles not less than 45°, is known as quarter sawing method

30. As per IS specifications, the maximum final setting time for ordinary Portland cement should be

1 hour

10 hours

6 hours

30 minutes

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31. Pick up the correct statement from the following:

Cupola furnace is used for the manufacture of cast iron

All of these

Air bubbles in casting produce a dull sound by tapping their surfaces lightly with a hammer

Red short iron is of no value for welding purpose

32. The initial setting time for ordinary Portland cement as per IS specifications should not be less than

10 minutes

30 minutes

60 minutes

600 minutes

33. Assertion A : Paints with white lead base are not recommended for painting of iron works.

Reason R : Paints with white lead base do not check rusting of iron.

Select your answer according to the coding system given below:

Both A and R is true but R is not the correct explanation of A

A is true but R is false

A is false but R is true

Both A and R is true and, R is the correct explanation of A

34. Which of the following represents a metamorphic rock?

(i) Slate

(ii) Shale

(iii) Quartzite

The correct answer is

Only (iii)

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

Both (i) and (iii)

Both (ii) and (iii)

35. Plywood is normally available

1 mm thick

3 mm to 4 mm thick

2 mm thick

2 to 3 mm thick

36. Quick lime is

Calcium hydroxide

None of the above

Calcium carbonate

Calcium oxide

37. Pick up the correct statement from the following:

The free quartz suddenly expands at a temperature lower than 600°C

The lime stone resists fire upto about 800°C and at higher temperature it splits into CaO and CO2

The sand stone with silicates resist a fire in a better way

All of these

38. Bullet proof glass is made of thick glass sheet sandwiched by a layer of

High test plastic

Steel

Chromium plate

Stainless steel

39. Rapid hardening cement attains early strength due to

Lesser proportion of lime grounded finer than normal cement

Excess percentage of gypsum

Lesser proportion of lime grounded coarser than normal cement

Larger proportion of lime grounded finer than normal cement

40. Resins are

Used in varnishes

Not soluble in water

Soluble in spirit

Left behind on evaporation of oil

Building Materials MCQs Set-7

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Building Materials MCQs Set-7

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