Building Materials MCQs Set-7

June 11, 2021

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Page 1 of 4

1. Shingle is

Air weathered rock

Crushed granite

Water bound pebbles

Decomposed laterite

2. Good quality stones must

Be durable

Be free from clay

All the above

Resist action of acids

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

High test plastic

Stainless steel

Steel

Chromium plate

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

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

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

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

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

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

Cambium layer

Annular rings

Heart wood

Medullary rays

6. Rapid hardening cement attains early strength due to

Lesser proportion of lime grounded finer than normal cement

Excess percentage of gypsum

Larger proportion of lime grounded finer than normal cement

Lesser proportion of lime grounded coarser than normal cement

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

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

20 %

10 %

5 %

15 %

9. Sand stone is

Igneous rock

Metamorphic rock

Sedimentary rock

Volcanic rock

10. Quick lime is

Calcium hydroxide

Calcium carbonate

None of the above

Calcium oxide

Page 2 of 4

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

2.0 to 2.5

3.0 to 3.5

2.5 to 3.0

1.5 to 2.0

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

Smaller than the size of a fully burnt brick

Greater than the size of a fully burnt brick

None of the above

Equal to the size of a fully burnt brick

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

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

Tangentially to annual rings, is known as tangential method

14. Lime putty

Is made by adding lime to water

All of these

Can be used only upto three days

Is made from hydraulic lime

15. The stone suitable for rubble masonry should be.

Hard

Heavy

Tough

Light

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

Proportioning of aggregates

Grading of aggregates

Fineness modulus

None of these

17.

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)

(iii) and (iv)

(i) and (ii)

(i) and (iv)

18. Plywood is normally available

3 mm to 4 mm thick

2 to 3 mm thick

2 mm thick

1 mm thick

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

30 minutes

1 hour

10 hours

6 hours

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

Water

Linseed oil

None of these

Varnish

Page 3 of 4

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

Shale

Gypsum

Sand stone

Lime stone

22. Pick up the correct statement from the following:

Styrene resin is produced from ethylene which is made from petroleum

Styrene resin transmits ultraviolet waves of light

All of these

Styrene resin is light in weight

23. 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

24. 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

Decreases

Increases

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

30 minutes

75 minutes

90 minutes

50 minutes

26. 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(iv)

(i) and (ii)

27. 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

28. 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

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

8% moisture content

14% moisture content

10% moisture content

12% moisture content

30. 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

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

All of these

Page 4 of 4

31. 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)

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

Only (iii)

32. 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°

0°

45°

90°

33. 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

34. Quick lime is

(i) Slow in setting

(ii) Rapid in slacking

(iii) Good in strength

The correct answer is

Only (i)

Both (ii) and (iii)

Only (ii)

Both (i) and (ii)

35. Pick up the correct statement from the following:

In open-hearth process, the furnace heats the steel

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

All the above

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

50 to 60 %

20 to 30 %

70 to 80 %

5 to 10 %

37. Resins are

Not soluble in water

Left behind on evaporation of oil

Used in varnishes

Soluble in spirit

38. In a mortar, the binding material is

Sand

Cinder

Cement

Surkhi (brick-dust)

39. Spalling hammer is used for

Breaking small projection of stones

Rough dressing of stones

Driving wooden headed chisels

Carving of stones

40. 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

Building Materials MCQs Set-7

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