Building Materials MCQs Set-7

Page 1 of 4

1. 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)

(i)and(iv)

(iii) and (iv)

(ii) and (iii)

2. Spalling hammer is used for

Rough dressing of stones

Carving of stones

Driving wooden headed chisels

Breaking small projection of stones

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

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

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

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

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

4. Sand stone is

Sedimentary rock

Volcanic rock

Igneous rock

Metamorphic rock

5. In a mortar, the binding material is

Surkhi (brick-dust)

Cinder

Sand

Cement

6. Resins are

Left behind on evaporation of oil

Used in varnishes

Not soluble in water

Soluble in spirit

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

Fineness modulus

Grading of aggregates

None of these

Proportioning of aggregates

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

First increases to a certain maximum value and then decreases

First decreases to a certain minimum value and then increases

Decreases

Increases

9. Rapid hardening cement attains early strength due to

Larger proportion of lime grounded finer than normal cement

Lesser proportion of lime grounded finer than normal cement

Excess percentage of gypsum

Lesser proportion of lime grounded coarser than normal cement

10. Quick lime is

(i) Slow in setting

(ii) Rapid in slacking

(iii) Good in strength

The correct answer is

Only (ii)

Both (ii) and (iii)

Only (i)

Both (i) and (ii)

Page 2 of 4

11.

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 (iv)

(i) and (ii)

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

40

20

10

30

13. Quick lime is

Calcium carbonate

None of the above

Calcium oxide

Calcium hydroxide

14. Plywood is normally available

1 mm thick

3 mm to 4 mm thick

2 mm thick

2 to 3 mm thick

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

Water

Linseed oil

Varnish

None of these

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

Chromium plate

Steel

Stainless steel

High test plastic

17. Pick up the correct statement from the following:

In open-hearth process, the furnace heats the steel

All the above

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

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

14% moisture content

8% moisture content

12% moisture content

10% moisture content

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

Lime stone

Sand stone

Gypsum

Shale

20. Which of the following represents a metamorphic rock?

(i) Slate

(ii) Shale

(iii) Quartzite

The correct answer is

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

Both (ii) and (iii)

Both (i) and (iii)

Only (iii)

Page 3 of 4

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

50 to 60 %

5 to 10 %

70 to 80 %

20 to 30 %

22. In the method of condensation polymerization,

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

All of these

23. Good quality stones must

Be durable

All the above

Be free from clay

Resist action of acids

24. 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

25. Lime putty

Is made from hydraulic lime

All of these

Is made by adding lime to water

Can be used only upto three days

26. Pick up the correct statement from the following:

Cupola furnace is used for the manufacture of cast iron

Red short iron is of no value for welding purpose

All of these

Air bubbles in casting produce a dull sound by tapping their surfaces lightly with a hammer

27. Pick up the correct statement from the following:

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

All of these

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

28. The stone suitable for rubble masonry should be.

Hard

Heavy

Tough

Light

29. 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

0°

30°

45°

90°

30. Shingle is

Crushed granite

Decomposed laterite

Water bound pebbles

Air weathered rock

Page 4 of 4

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

Cambium layer

Annular rings

Heart wood

Medullary rays

32. Pick up the correct statement from the following:

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

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

All of these

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

2.0 to 2.5

3.0 to 3.5

1.5 to 2.0

2.5 to 3.0

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

50 minutes

30 minutes

75 minutes

90 minutes

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

10 hours

30 minutes

6 hours

1 hour

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

5 %

15 %

10 %

20 %

37. 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

A is true but R is false

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

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

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

All of these

39. 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

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

10 minutes

600 minutes

30 minutes

60 minutes

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