Building Materials MCQs Set-7

June 11, 2021

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

High test plastic

Steel

Chromium plate

Stainless steel

2. Pick up the correct statement from the following:

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

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

All of these

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

3. Pick up the correct statement from the following:

All of these

Cupola furnace is used for the manufacture of cast iron

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

4. Rapid hardening cement attains early strength due to

Excess percentage of gypsum

Larger proportion of lime grounded finer than normal cement

Lesser proportion of lime grounded finer than normal cement

Lesser proportion of lime grounded coarser than normal cement

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

10 hours

30 minutes

6 hours

1 hour

6. 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

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

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

7. Pick up the correct statement from the following:

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

In open-hearth process, the furnace heats the steel

All the above

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

Heart wood

Cambium layer

Medullary rays

Annular rings

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

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

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

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

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

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

Varnish

Linseed oil

Water

None of these

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

Tangentially to annual rings, is known as tangential method

All of these

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

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

12. Spalling hammer is used for

Carving of stones

Breaking small projection of stones

Driving wooden headed chisels

Rough dressing of stones

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

5 to 10 %

70 to 80 %

50 to 60 %

20 to 30 %

14. Quick lime is

Calcium hydroxide

None of the above

Calcium carbonate

Calcium oxide

15. In a mortar, the binding material is

Cement

Cinder

Surkhi (brick-dust)

Sand

16. Which of the following represents a metamorphic rock?

(i) Slate

(ii) Shale

(iii) Quartzite

The correct answer is

Both (ii) and (iii)

Both (i) and (iii)

Only (iii)

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

17. Good quality stones must

All the above

Resist action of acids

Be durable

Be free from clay

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°

0°

90°

30°

19.

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)

20. Pick up the correct statement from the following:

All of these

Styrene resin is light in weight

Styrene resin transmits ultraviolet waves of light

Styrene resin is produced from ethylene which is made from petroleum

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

10 minutes

30 minutes

600 minutes

60 minutes

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

3.0 to 3.5

1.5 to 2.0

2.0 to 2.5

2.5 to 3.0

23. 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)

24. 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)

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

50 minutes

30 minutes

90 minutes

75 minutes

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

Equal to the size of a fully burnt brick

Greater than the size of a fully burnt brick

None of the above

Smaller than the size of a fully burnt brick

27. The stone suitable for rubble masonry should be.

Tough

Light

Hard

Heavy

28. Lime putty

Is made from hydraulic lime

Can be used only upto three days

All of these

Is made by adding lime to water

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

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 true but R is false

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

A is false but R is true

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

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

5 %

15 %

20 %

10 %

32. Plywood is normally available

2 mm thick

1 mm thick

2 to 3 mm thick

3 mm to 4 mm thick

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

Increases

First increases to a certain maximum value and then decreases

First decreases to a certain minimum value and then increases

Decreases

34. 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 hydrogen chloride

The reaction proceeds with an evolution of ammonia

35. Resins are

Used in varnishes

Soluble in spirit

Left behind on evaporation of oil

Not soluble in water

36. Sand stone is

Volcanic rock

Igneous rock

Sedimentary rock

Metamorphic rock

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

Gypsum

Shale

Sand stone

Lime stone

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

14% moisture content

10% moisture content

12% moisture content

8% moisture content

39. Shingle is

Water bound pebbles

Decomposed laterite

Air weathered rock

Crushed granite

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

Grading of aggregates

Proportioning of aggregates

Fineness modulus

None of these

Building Materials MCQs Set-7

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