Building Materials MCQs Set-7

June 11, 2021

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

Water

Varnish

Linseed oil

None of these

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

90 minutes

75 minutes

30 minutes

50 minutes

3. 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 (ii) and (iii)

Both (i) and (iii)

4. 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

In basic Bessemer process, the steel heats the converter

All the above

5. Rapid hardening cement attains early strength due to

Excess percentage of gypsum

Lesser proportion of lime grounded finer than normal cement

Larger proportion of lime grounded finer than normal cement

Lesser proportion of lime grounded coarser than normal cement

6. The stone suitable for rubble masonry should be.

Hard

Light

Tough

Heavy

7. Shingle is

Decomposed laterite

Water bound pebbles

Air weathered rock

Crushed granite

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

Decreases

Increases

First decreases to a certain minimum value and then increases

First increases to a certain maximum value and then decreases

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

Heart wood

Medullary rays

Cambium layer

Annular rings

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

High test plastic

Chromium plate

Steel

Stainless steel

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11. 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°

0°

30°

12. 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

All of these

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

13.

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)

(iii) and (iv)

(i) and (ii)

(ii) and (iii)

14. Spalling hammer is used for

Carving of stones

Breaking small projection of stones

Rough dressing of stones

Driving wooden headed chisels

15. In the method of condensation polymerization,

All of these

The reaction proceeds with an evolution of hydrogen chloride

The reaction proceeds with an evolution of ammonia

Low-molecular substances are removed from the high molecular substance

16. Quick lime is

Calcium oxide

None of the above

Calcium carbonate

Calcium hydroxide

17. Lime putty

Can be used only upto three days

Is made from hydraulic lime

All of these

Is made by adding lime to water

18. Quick lime is

(i) Slow in setting

(ii) Rapid in slacking

(iii) Good in strength

The correct answer is

Only (i)

Both (i) and (ii)

Both (ii) and (iii)

Only (ii)

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

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

20 %

10 %

5 %

15 %

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

14% moisture content

8% moisture content

10% moisture content

12% moisture content

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

Shale

Sand stone

Lime stone

Gypsum

23. In a mortar, the binding material is

Surkhi (brick-dust)

Cinder

Sand

Cement

24. Sand stone is

Sedimentary rock

Igneous rock

Volcanic rock

Metamorphic rock

25. Plywood is normally available

2 mm thick

1 mm thick

3 mm to 4 mm thick

2 to 3 mm thick

26. Pick up the correct statement from the following:

Red short iron is of no value for welding purpose

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

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

Fineness modulus

Proportioning of aggregates

Grading of aggregates

None of these

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

600 minutes

60 minutes

30 minutes

10 minutes

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

10 hours

1 hour

30 minutes

6 hours

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

70 to 80 %

20 to 30 %

50 to 60 %

5 to 10 %

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31. Good quality stones must

All the above

Be free from clay

Be durable

Resist action of acids

32. 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

All of these

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

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

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

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

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

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

34. 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

(i) and (ii)

(iii) and (iv)

(ii) and (iii)

(i)and(iv)

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

1.5 to 2.0

2.5 to 3.0

2.0 to 2.5

3.0 to 3.5

36. 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

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

37. Pick up the correct statement from the following:

Styrene resin is light in weight

All of these

Styrene resin is produced from ethylene which is made from petroleum

Styrene resin transmits ultraviolet waves of light

38. 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

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

Smaller than the size of a fully burnt brick

Equal to the size of a fully burnt brick

None of the above

Greater than the size of a fully burnt brick

40. Resins are

Left behind on evaporation of oil

Used in varnishes

Not soluble in water

Soluble in spirit

Building Materials MCQs Set-7

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