Building Materials MCQs Set-7

June 11, 2021

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1. Quick lime is

Calcium oxide

None of the above

Calcium carbonate

Calcium hydroxide

2. Sand stone is

Metamorphic rock

Igneous rock

Sedimentary rock

Volcanic rock

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

Grading of aggregates

Proportioning of aggregates

None of these

Fineness modulus

4. 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)

(i)and(iv)

(i) and (ii)

(iii) and (iv)

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

Annular rings

Cambium layer

Heart wood

Medullary rays

6. Rapid hardening cement attains early strength due to

Lesser proportion of lime grounded coarser than normal cement

Lesser proportion of lime grounded finer than normal cement

Larger proportion of lime grounded finer than normal cement

Excess percentage of gypsum

7. Resins are

Used in varnishes

Not soluble in water

Soluble in spirit

Left behind on evaporation of oil

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

3.0 to 3.5

1.5 to 2.0

2.5 to 3.0

2.0 to 2.5

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

30 minutes

1 hour

6 hours

10 hours

10. Pick up the correct statement from the following:

All the above

In open-hearth process, the furnace heats the steel

In basic Bessemer process, the steel heats the converter

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

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11. Lime putty

Is made from hydraulic lime

Is made by adding lime to water

All of these

Can be used only upto three days

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

30 minutes

10 minutes

60 minutes

600 minutes

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

15 %

5 %

20 %

10 %

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

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

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

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

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

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 but R is not the correct explanation of A

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

A is false but R is true

A is true but R is false

16. Good quality stones must

Resist action of acids

Be durable

All the above

Be free from clay

17. Pick up the correct statement from the following:

All of these

Styrene resin is light in weight

Styrene resin is produced from ethylene which is made from petroleum

Styrene resin transmits ultraviolet waves of light

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°

30°

90°

0°

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

Varnish

Linseed oil

None of these

Water

20. Pick up the correct statement from the following:

Cupola furnace is used for the manufacture of cast iron

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

All of these

Page 3 of 4

21. Pick up the correct statement from the following:

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

All of these

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

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

Decreases

First increases to a certain maximum value and then decreases

First decreases to a certain minimum value and then increases

Increases

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

Stainless steel

Chromium plate

High test plastic

Steel

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

12% moisture content

8% moisture content

14% moisture content

10% moisture content

25. The stone suitable for rubble masonry should be.

Light

Hard

Heavy

Tough

26. Quick lime is

(i) Slow in setting

(ii) Rapid in slacking

(iii) Good in strength

The correct answer is

Only (ii)

Only (i)

Both (ii) and (iii)

Both (i) and (ii)

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

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

90 minutes

75 minutes

50 minutes

30 minutes

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

None of the above

Greater than the size of a fully burnt brick

Smaller than the size of a fully burnt brick

Equal to the size of a fully burnt brick

30. Plywood is normally available

2 mm thick

2 to 3 mm thick

1 mm thick

3 mm to 4 mm thick

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

Tangentially to annual rings, is known as tangential method

All of these

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

32. Pick up the correct statement from the following:

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

All of these

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

33. In the method of condensation polymerization,

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

All of these

34. Spalling hammer is used for

Carving of stones

Driving wooden headed chisels

Rough dressing of stones

Breaking small projection of stones

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

Gypsum

Lime stone

Shale

Sand stone

36. Which of the following represents a metamorphic rock?

(i) Slate

(ii) Shale

(iii) Quartzite

The correct answer is

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

Both (i) and (iii)

Both (ii) and (iii)

Only (iii)

37. Shingle is

Water bound pebbles

Air weathered rock

Decomposed laterite

Crushed granite

38.

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)

(i) and (ii)

(ii) and (iii)

(i) and (iv)

39. In a mortar, the binding material is

Surkhi (brick-dust)

Cement

Sand

Cinder

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

5 to 10 %

20 to 30 %

70 to 80 %

50 to 60 %

Building Materials MCQs Set-7

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