Building Materials MCQs Set-7

June 11, 2021

Show paginator

Hide paginator

25%

Page 1 of 4

1. In a mortar, the binding material is

Sand

Surkhi (brick-dust)

Cinder

Cement

2. 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

A is false but R is true

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

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

70 to 80 %

20 to 30 %

5 to 10 %

50 to 60 %

4. 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°

30°

0°

90°

5. Lime putty

Is made from hydraulic lime

Is made by adding lime to water

All of these

Can be used only upto three days

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

First decreases to a certain minimum value and then increases

Increases

First increases to a certain maximum value and then decreases

Decreases

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

8% moisture content

10% moisture content

14% moisture content

12% moisture content

8. Pick up the correct statement from the following:

All the above

In open-hearth process, the furnace heats the steel

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

9. 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

10. Shingle is

Decomposed laterite

Crushed granite

Water bound pebbles

Air weathered rock

Page 2 of 4

11. Quick lime is

None of the above

Calcium hydroxide

Calcium oxide

Calcium carbonate

12. Pick up the correct statement from the following:

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

All of these

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

13. Sand stone is

Igneous rock

Metamorphic rock

Sedimentary rock

Volcanic rock

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

1 hour

10 hours

30 minutes

6 hours

15. 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

16. 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)

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

Linseed oil

None of these

Varnish

Water

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

Annular rings

Medullary rays

Cambium layer

Heart wood

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

(i) and (iv)

(i) and (ii)

(iii) and (iv)

(ii) and (iii)

20. Pick up the correct statement from the following:

Styrene resin transmits ultraviolet waves of light

Styrene resin is produced from ethylene which is made from petroleum

Styrene resin is light in weight

All of these

Page 3 of 4

21. 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)

22. Spalling hammer is used for

Breaking small projection of stones

Driving wooden headed chisels

Rough dressing of stones

Carving of stones

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

Steel

High test plastic

Chromium plate

Stainless steel

24. Which of the following represents a metamorphic rock?

(i) Slate

(ii) Shale

(iii) Quartzite

The correct answer is

Both (i) and (iii)

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

Only (iii)

Both (ii) and (iii)

25. Plywood is normally available

1 mm thick

2 to 3 mm thick

2 mm thick

3 mm to 4 mm thick

26. 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

27. Good quality stones must

Be durable

Be free from clay

Resist action of acids

All the above

28. Pick up the correct statement from the following:

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

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

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

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

Gypsum

Lime stone

Shale

Sand stone

Page 4 of 4

31. Resins are

Used in varnishes

Soluble in spirit

Left behind on evaporation of oil

Not soluble in water

32. 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

33. The stone suitable for rubble masonry should be.

Tough

Light

Heavy

Hard

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

1.5 to 2.0

2.0 to 2.5

2.5 to 3.0

3.0 to 3.5

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

Equal to the size of a fully burnt brick

Smaller than the size of a fully burnt brick

Greater than the size of a fully burnt brick

None of the above

36. 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

Lesser proportion of lime grounded coarser than normal cement

Excess percentage of gypsum

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

None of these

Fineness modulus

Proportioning of aggregates

Grading of aggregates

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

20 %

15 %

5 %

10 %

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

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

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

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

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

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

90 minutes

50 minutes

30 minutes

75 minutes

Building Materials MCQs Set-7

Related

1 Response

Leave a ReplyCancel reply

Secured Payments

Protection

Building Materials MCQs Set-7

Share this Now with Friends:

Related

1 Response

Leave a ReplyCancel reply

Secured Payments

Protection