Building Materials MCQs Set-7

June 11, 2021

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1. Resins are

Soluble in spirit

Left behind on evaporation of oil

Not soluble in water

Used in varnishes

2. The stone suitable for rubble masonry should be.

Light

Heavy

Tough

Hard

3. Pick up the correct statement from the following:

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

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

All of these

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

4. Quick lime is

Calcium hydroxide

None of the above

Calcium carbonate

Calcium oxide

5. Spalling hammer is used for

Carving of stones

Driving wooden headed chisels

Rough dressing of stones

Breaking small projection of stones

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

1 hour

30 minutes

10 hours

6 hours

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

90 minutes

50 minutes

30 minutes

75 minutes

8. Pick up the correct statement from the following:

Styrene resin transmits ultraviolet waves of light

Styrene resin is produced from ethylene which is made from petroleum

Styrene resin is light in weight

All of these

9. Lime putty

Is made from hydraulic lime

All of these

Can be used only upto three days

Is made by adding lime to water

10. Quick lime is

(i) Slow in setting

(ii) Rapid in slacking

(iii) Good in strength

The correct answer is

Both (ii) and (iii)

Only (i)

Only (ii)

Both (i) and (ii)

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11. 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

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

Heart wood

Annular rings

Medullary rays

Cambium layer

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

Greater than the size of a fully burnt brick

Equal to the size of a fully burnt brick

Smaller than the size of a fully burnt brick

None of the above

14. Sand stone is

Sedimentary rock

Volcanic rock

Igneous rock

Metamorphic rock

15. 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

All of these

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

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

17. Good quality stones must

All the above

Be free from clay

Resist action of acids

Be durable

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

90°

45°

30°

0°

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

2.5 to 3.0

3.0 to 3.5

2.0 to 2.5

1.5 to 2.0

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

Stainless steel

Steel

Chromium plate

High test plastic

Page 3 of 4

21. Which of the following represents a metamorphic rock?

(i) Slate

(ii) Shale

(iii) Quartzite

The correct answer is

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

Only (iii)

Both (ii) and (iii)

Both (i) and (iii)

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

All of these

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

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

23. Pick up the correct statement from the following:

Red short iron is of no value for welding purpose

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

All of these

Cupola furnace is used for the manufacture of cast iron

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

Gypsum

Sand stone

Lime stone

Shale

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

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

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

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

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

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

Linseed oil

Varnish

None of these

Water

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

Grading of aggregates

Fineness modulus

Proportioning of aggregates

None of these

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

12% moisture content

14% moisture content

8% moisture content

10% moisture content

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

60 minutes

600 minutes

30 minutes

10 minutes

30. 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:

A is false but R is true

A is true but R is false

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

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

Page 4 of 4

31.

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

(ii) and (iii)

(i) and (iv)

(iii) and (iv)

(i) and (ii)

32. Shingle is

Air weathered rock

Crushed granite

Decomposed laterite

Water bound pebbles

33. In a mortar, the binding material is

Cement

Surkhi (brick-dust)

Cinder

Sand

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

10 %

15 %

20 %

5 %

35. In the method of condensation polymerization,

All of these

Low-molecular substances are removed from the high molecular substance

The reaction proceeds with an evolution of ammonia

The reaction proceeds with an evolution of hydrogen chloride

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

First decreases to a certain minimum value and then increases

First increases to a certain maximum value and then decreases

Increases

Decreases

37. Plywood is normally available

1 mm thick

2 mm thick

3 mm to 4 mm thick

2 to 3 mm thick

38. 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

(ii) and (iii)

(iii) and (iv)

(i) and (ii)

(i)and(iv)

39. Pick up the correct statement from the following:

In open-hearth process, the furnace heats the steel

All the above

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

In basic Bessemer process, the steel heats the converter

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

20 to 30 %

70 to 80 %

5 to 10 %

50 to 60 %

Building Materials MCQs Set-7

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