Building Materials MCQs Set-7

June 11, 2021

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Page 1 of 4

1. Resins are

Left behind on evaporation of oil

Not soluble in water

Soluble in spirit

Used in varnishes

2. Lime putty

Can be used only upto three days

All of these

Is made by adding lime to water

Is made from hydraulic lime

3. Pick up the correct statement from the following:

In basic Bessemer process, the steel heats the converter

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

4. Quick lime is

Calcium oxide

None of the above

Calcium hydroxide

Calcium carbonate

5. Shingle is

Air weathered rock

Water bound pebbles

Crushed granite

Decomposed laterite

6. Quick lime is

(i) Slow in setting

(ii) Rapid in slacking

(iii) Good in strength

The correct answer is

Both (ii) and (iii)

Both (i) and (ii)

Only (ii)

Only (i)

7. Good quality stones must

Be free from clay

All the above

Be durable

Resist action of acids

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

High test plastic

Chromium plate

Stainless steel

Steel

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

Grading of aggregates

Fineness modulus

None of these

Proportioning of aggregates

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

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11. Plywood is normally available

2 mm thick

1 mm thick

3 mm to 4 mm thick

2 to 3 mm thick

12. Spalling hammer is used for

Driving wooden headed chisels

Breaking small projection of stones

Carving of stones

Rough dressing of stones

13. The stone suitable for rubble masonry should be.

Hard

Tough

Heavy

Light

14. 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

15. 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 and, R is the correct explanation of A

A is false but R is true

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

A is true but R is false

16. Which of the following represents a metamorphic rock?

(i) Slate

(ii) Shale

(iii) Quartzite

The correct answer is

Both (ii) and (iii)

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

Both (i) and (iii)

Only (iii)

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

Equal to the size of a fully burnt brick

Smaller than the size of a fully burnt brick

None of the above

Greater than the size of a fully burnt brick

18.

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

(i) and (iv)

(i) and (ii)

(iii) and (iv)

(ii) and (iii)

19. In the method of condensation polymerization,

Low-molecular substances are removed from the high molecular substance

The reaction proceeds with an evolution of hydrogen chloride

The reaction proceeds with an evolution of ammonia

All of these

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

10% moisture content

8% moisture content

12% moisture content

14% moisture content

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21. In a mortar, the binding material is

Cement

Sand

Cinder

Surkhi (brick-dust)

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

10 minutes

60 minutes

600 minutes

30 minutes

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

2.5 to 3.0

2.0 to 2.5

3.0 to 3.5

1.5 to 2.0

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

Heart wood

Annular rings

Cambium layer

Medullary rays

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

50 to 60 %

5 to 10 %

70 to 80 %

20 to 30 %

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

First decreases to a certain minimum value and then increases

Increases

First increases to a certain maximum value and then decreases

Decreases

27. Rapid hardening cement attains early strength due to

Lesser proportion of lime grounded finer than normal cement

Lesser proportion of lime grounded coarser than normal cement

Excess percentage of gypsum

Larger proportion of lime grounded finer than normal cement

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

50 minutes

75 minutes

90 minutes

30 minutes

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

30 minutes

6 hours

1 hour

10 hours

30. 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 (ii)

(ii) and (iii)

(i)and(iv)

Page 4 of 4

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

5 %

10 %

20 %

15 %

32. Pick up the correct statement from the following:

All of these

Styrene resin transmits ultraviolet waves of light

Styrene resin is produced from ethylene which is made from petroleum

Styrene resin is light in weight

33. 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

30°

45°

90°

0°

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

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

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

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

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

35. Pick up the correct statement from the following:

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

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

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

Water

Varnish

None of these

Linseed oil

37. Sand stone is

Metamorphic rock

Igneous rock

Sedimentary rock

Volcanic rock

38. Pick up the correct statement from the following:

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

Cupola furnace is used for the manufacture of cast iron

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

Shale

Gypsum

Sand stone

Lime stone

40. Pick up the correct statement from the following:

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

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

All of these

Building Materials MCQs Set-7

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