Question 1

The minimum strength of brick required for building wall is A)7.5 N/mm² B)5.0 N/mm² C)3.5 N/mm² D)2.5 N/mm²

Accepted Answer

The minimum strength of brick required for building wall is 3.5 N/mm^2, ensuring the structural integrity and safety of the construction.

Question 2

To check the size of brick number of bricks to be kept side by side is
A)30
B)20
C)10
D)5

Accepted Answer

B

Question 3

The bricks which may be used to build wall but to be provided with plaster are
A)Ist Class
B)IInd Class
C)IIIrd Class
D)IVth Class

Accepted Answer

Second class bricks are used for walls that will be plastered because they may have surface imperfections that need to be covered.

Question 4

The compressive strength of high duty bricks should be more than A)40 N/mm² B)20 N/mm² C)5 N/mm² D)3.5 N/mm²

Accepted Answer

High duty bricks, known for their use in structures requiring high strength, must have a compressive strength of more than 40 N/mm^2. This ensures they can withstand significant loads and stresses.

Question 5

Thickness of web of hollow bricks should not be less than
A)20 mm
B)16 mm
C)12 mm
D)8 mm

Accepted Answer

The answer of Thickness of web of hollow bricks should...

Question 6

Compressive strength of paving bricks should not be less than A)40 N/mm² B)30 N/mm² C)20 N/mm² D)40 N/mm².

Accepted Answer

The minimum compressive strength for paving bricks is typically 40 N/mm² to ensure durability and resistance to loads.

Question 7

Field test for strength of good bricks is to drop it from a height of ______ and they should not break
A)1.2 m
B)1.0 m
C)0.7 m
D)0.75 m

Accepted Answer

The answer of Field test for strength of good bricks...

Question 8

For making stabilized soil brick the soil is stabilized with
A)sand
B)coal
C)cement
D)salt

Accepted Answer

Cement is commonly used to stabilize soil in the production of stabilized soil bricks, enhancing their strength and durability.

Question 9

Refractory bricks resist
A)high temperature
B)chemical action
C)action of frost
D)all of the above

Accepted Answer

The answer of Refractory bricks resist
A)high temperature
B)chemical action
C)action of frost
D)all...

Question 10

In case of round tiles, under-tiles are used with their narrow ends
A)towards eve
B)towards ridge
C)towards valley
D)in any one fashion

Accepted Answer

The answer of In case of round tiles, under-tiles are...

Question 11

Maximum water absorption permitted on class AA type Mangalore tiles is
A)13%
B)15%
C)17%
D)19%

Accepted Answer

The answer of Maximum water absorption permitted on class AA...

Question 12

Which of the following statement is wrong?
A)Pan tiles are similar to half round tiles but less curved
B)Pan tiles are weaker than half round tiles
C)Allahabad tiles are interlocking tiles
D)Mangalore tiles are also interlocking tiles

Accepted Answer

Pan tiles are stronger than half round tiles.

Question 13

Terracotta means
A)insulated
B)fit for sanitary services
C)good for ornamental work
D)baked earth

Accepted Answer

Terracotta is an Italian word that translates to "baked earth," which accurately describes the material's composition and production process. It is a type of earthenware that is made from clay and is typically used for pottery, sculptures, and building decoration after being fired at a high temperature.

Question 14

Water absorption of vitrified tiles is not more than
A)0.5%
B)1.0%
C)2.0%
D)5.0%

Accepted Answer

Vitrified tiles are known for their very low water absorption rate, which is not more than 0.5%. This characteristic makes them highly suitable for areas that require low moisture absorption.

Question 15

To make terracotta porous, the following is mixed with clay before burning.
A)lime
B)silica
C)sawdust
D)none of the above

Accepted Answer

Sawdust is mixed with clay before burning to make terracotta porous. During the firing process, the sawdust burns away, leaving behind tiny holes that make the final product porous.

Question 16

By calcining and smelting iron ores, a crude and impure form of iron obtained is known as
A)cast iron
B)wrought iron
C)steel
D)pig iron

Accepted Answer

Pig iron is the crude and impure form of iron obtained by the smelting of iron ore in a blast furnace. It serves as the raw material for the production of cast iron, wrought iron, and steel after further processing.

Question 17

The colour of cast iron is
A)grey
B)white
C)both grey and white
D)none of the above

Accepted Answer

Cast iron can be both grey and white, depending on its composition and cooling rate. Grey cast iron has graphite flakes that give it a grey appearance, while white cast iron lacks these graphite flakes, leading to a white or light appearance due to the presence of cementite.

Question 18

The compressive and tensile strength of cast iron are A)700 N/m² and 150 N/mm² B)600 N/mm² and 400 N/mm² C)415 N/mm² and 415 N/mm² D)400 N/mm² and 600 N/mm²

Accepted Answer

Cast iron typically has a higher compressive strength of around 700 N/mm^2 and a lower tensile strength of about 150 N/mm^2, making option A correct.

Question 19

For making spiral staircases, ideal material is
A)pig iron
B)cast iron
C)wrought iron
D)steel

Accepted Answer

Cast iron is the ideal material for making spiral staircases due to its ability to be cast into complex, intricate shapes and its excellent compressive strength, which is crucial for supporting weight in a spiral staircase design.

Question 20

Purest form of iron is
A)pig iron
B)cast iron
C)wrought iron
D)steel

Accepted Answer

Wrought iron is the purest form of iron with the least amount of carbon content, making it tough, malleable, and less fusible than other forms.

Quiz 4: Brick, Tile, and Metal Properties and Uses

The minimum strength of brick required for building wall is

To check the size of brick number of bricks to be kept side by side is

The bricks which may be used to build wall but to be provided with plaster are

The compressive strength of high duty bricks should be more than

Thickness of web of hollow bricks should not be less than

Compressive strength of paving bricks should not be less than

Field test for strength of good bricks is to drop it from a height of ______ and they should not break

For making stabilized soil brick the soil is stabilized with

Refractory bricks resist

In case of round tiles, under-tiles are used with their narrow ends

Maximum water absorption permitted on class AA type Mangalore tiles is

Which of the following statement is wrong?

Terracotta means

Water absorption of vitrified tiles is not more than

To make terracotta porous, the following is mixed with clay before burning.

By calcining and smelting iron ores, a crude and impure form of iron obtained is known as

The colour of cast iron is

The compressive and tensile strength of cast iron are

For making spiral staircases, ideal material is

Purest form of iron is