Building Materials MCQs Set-7

Page 1 of 4

1. Good quality stones must

Be durable

All the above

Be free from clay

Resist action of acids

2. Sand stone is

Metamorphic rock

Igneous rock

Volcanic rock

Sedimentary rock

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

Stainless steel

High test plastic

Steel

Chromium plate

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

First decreases to a certain minimum value and then increases

Decreases

Increases

First increases to a certain maximum value and then decreases

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

Sand stone

Shale

Gypsum

Lime stone

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

2.5 to 3.0

1.5 to 2.0

3.0 to 3.5

2.0 to 2.5

7. 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

8. Pick up the correct statement from the following:

All of these

Styrene resin is produced from ethylene which is made from petroleum

Styrene resin is light in weight

Styrene resin transmits ultraviolet waves of light

9. Resins are

Not soluble in water

Soluble in spirit

Used in varnishes

Left behind on evaporation of oil

10.

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 (ii)

(ii) and (iii)

(i) and (iv)

(iii) and (iv)

Page 2 of 4

11. Pick up the correct statement from the following:

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

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

All of these

12. 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(iv)

(i) and (ii)

(ii) and (iii)

13. 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

14. 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

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

5 to 10 %

50 to 60 %

20 to 30 %

70 to 80 %

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

30 minutes

90 minutes

50 minutes

75 minutes

17. 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°

0°

45°

30°

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

10 hours

6 hours

1 hour

30 minutes

19. In the method of condensation polymerization,

The reaction proceeds with an evolution of ammonia

The reaction proceeds with an evolution of hydrogen chloride

All of these

Low-molecular substances are removed from the high molecular substance

20. Quick lime is

Calcium hydroxide

Calcium carbonate

None of the above

Calcium oxide

Page 3 of 4

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

30

10

40

20

22. 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 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

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

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

30 minutes

600 minutes

10 minutes

60 minutes

24. Plywood is normally available

3 mm to 4 mm thick

2 mm thick

2 to 3 mm thick

1 mm thick

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

Medullary rays

Heart wood

Annular rings

Cambium layer

26. Spalling hammer is used for

Rough dressing of stones

Driving wooden headed chisels

Carving of stones

Breaking small projection of stones

27. The stone suitable for rubble masonry should be.

Light

Tough

Hard

Heavy

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

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

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

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

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

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

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

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

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

Smaller than the size of a fully burnt brick

None of the above

Greater than the size of a fully burnt brick

Equal to the size of a fully burnt brick

Page 4 of 4

31. Which of the following represents a metamorphic rock?

(i) Slate

(ii) Shale

(iii) Quartzite

The correct answer is

Only (iii)

Both (ii) and (iii)

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

Both (i) and (iii)

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

12% moisture content

8% moisture content

10% moisture content

14% moisture content

33. Pick up the correct statement from the following:

In basic Bessemer process, the steel heats the converter

All the above

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

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

None of these

Water

Linseed oil

Varnish

35. Shingle is

Crushed granite

Water bound pebbles

Decomposed laterite

Air weathered rock

36. Rapid hardening cement attains early strength due to

Lesser proportion of lime grounded coarser than normal cement

Excess percentage of gypsum

Larger proportion of lime grounded finer than normal cement

Lesser proportion of lime grounded finer than normal cement

37. In a mortar, the binding material is

Cement

Surkhi (brick-dust)

Sand

Cinder

38. Lime putty

Is made from hydraulic lime

All of these

Is made by adding lime to water

Can be used only upto three days

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

5 %

15 %

20 %

10 %

40. 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 (i)

Only (ii)

Building Materials MCQs Set-7

Related

Leave a ReplyCancel reply

Secured Payments

Protection

Building Materials MCQs Set-7

Share this Now with Friends:

Related

Leave a ReplyCancel reply

Secured Payments

Protection