Building Materials Quiz-2

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Building Materials Set – 2

1 / 25

Quick lime

Generates heat when added to water

All the above

Reacts with carbon dioxide

May be used for white-washing

2 / 25

Which of the following stresses is used for identifying the quality of structural steel?

Yield stress

Ultimate stress

Proof stress

None of the above

3 / 25

Pick up the correct statement from the following:

All the above

Quick lime is obtained by burning pure lime stone

Hydraulic lime is obtained by burning lime stone containing clay 5% to 30%

Poor lime is obtained by burning lime stone containing impurities more than 5%

4 / 25

For testing compressive and tensile strength of cement, the cement mortar is made by mixing
cement and standard sand in the proportions of

1 : 6

1 : 2

1 : 4

1 : 3

5 / 25

Inner part of a timber log surrounding the pitch, is called

None to these

Cambium layer

Sapwood

Heart wood

6 / 25

Which of the following cements contains maximum percentage of dicalcium silicate?

Sulphate resisting cement

Ordinary Portland cement

Rapid hardening cement

Low heat cement

7 / 25

The plywood

Has greater impact resistance to blows than ordinary wood

Has good strength along the panel only

Can be spilt in the plane of the panel

Cannot be bent more easily than ordinary wood of same thickness

8 / 25

Due to attack of dry rot, the timber

Reduces to powder

None of these

Cracks

Shrinks

9 / 25

Early attainment of strength in rapid hardening cement is mainly due to

Tri-calcium aluminate

Tri-calcium silicate

Finer grinding

Gypsum

10 / 25

The constituent of cement which is responsible for all the undesirable properties of cement is

Tri-calcium aluminate

Tri-calcium silicate

Tetra calcium alumino ferrite

Di-calcium silicate

11 / 25

Which of the following is the purest form of iron?

Mild steel

Wrought iron

High carbon steel

Cast iron

12 / 25

If ‘P’ is the percentage of water required for normal consistency, water to be added for
determination of initial setting time, is

0.85 P

0.80 P

0.75 P

0.70 P

13 / 25

Advantage of a clamp compared to a kiln for burning bricks is that

It gives more output of first class bricks

It is suitable when bricks are required in large numbers

It has less initial cost

It takes less time for burning

14 / 25

The basic purpose of a retarder in concrete is

To decrease the initial setting time of cement paste in concrete

To improve the workability of concrete mix

To increase the initial setting time of cement paste in concrete

To render the concrete more water tight

15 / 25

During pudding

Silicon forms a slag

All the above

Carbon is converted into carbonic acid gas

Molten metal is kept clear of the fuel

16 / 25

Pick up the correct statement from the following:

All the above

In stone walls, the stones are placed with their natural beds as horizontal

In stone arches, the stones are placed with their natural beds radial

In cornices, the stones are placed with their natural beds as vertical

17 / 25

Pick up the correct statement from the following:

Solder material is an alloy which melts at a temperature above 400°C

All the above

Brazing is done at temperature above 600°C to 1100°C

Brazing joint is stronger than the solder joint

18 / 25

The stretcher bond in brick masonry can be used only when the thickness of wall is The stretcher bond in brick masonry can be used only when the thickness of wall is

190 mm

90 mm

280 mm

180 mm

19 / 25

The rocks which are formed due to cooling of magma at a considerable depth from earth’s surface
are called

Plutonic rocks

Hypabyssal rocks

Igneous rocks

Volcanic rocks

20 / 25

Plywood has the advantage of

Same tensile strength in all directions

Greater tensile strength in shorter direction

Greater tensile strength in longer direction

None of the above

21 / 25

Clay and silt content in a good brick earth must be at least

50 %

25 %

30 %

40 %

22 / 25

Which of the following has more fire-resisting characteristics?

Marble

Compact sand stone

Granite

Lime stone

23 / 25

Pick up the incorrect statement from the following:

Hydraulic lime sets slowly as compared to fat lime

Hydraulic lime is generally used in lime mortar

Hydraulic lime is generally obtained by burning kankar

None of these

24 / 25

Excess of alumina in brick earth makes the brick

Impermeable

To lose cohesion

To crack and warp on drying

Brittle and weak

25 / 25

Pick up the correct statement from the following:

Phenol reacts with formaldehyde, to form phenol formaldehyde resin

The phenol is carbolic acid

All the above

The phenol is either extracted from coal-tar or prepared from benzene

Your score is

The average score is 36%

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