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

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

Answer 1

3.5 N/mm²

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

Answer 2

20

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

Answer 3

IInd Class

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

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

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.

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

Question 8

For making stabilized soil brick the soil is stabilized with

A)sand
B)coal
C)cement
D)salt

Question 9

Refractory bricks resist

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

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

Question 11

Maximum water absorption permitted on class AA type Mangalore tiles is

A)13%
B)15%
C)17%
D)19%

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

Question 13

Terracotta means

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

Question 14

Water absorption of vitrified tiles is not more than

A)0.5%
B)1.0%
C)2.0%
D)5.0%

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

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

Question 17

The colour of cast iron is

A)grey
B)white
C)both grey and white
D)none of the above

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

Question 19

For making spiral staircases, ideal material is

A)pig iron
B)cast iron
C)wrought iron
D)steel

Question 20

Purest form of iron is

A)pig iron
B)cast iron
C)wrought iron
D)steel

Question 21

Carbon content in wrought iron is

A)0.15%
B)0.25 to 1.5%
C)2 to 4%
D)more than 4%

Question 22

The ratio of tensile strength to compressive strength of steel is

A)less than 1
B)equal to 1
C)more than 1
D)nothing can be said definitely

Question 23

Ribs are made on steel wires to increase

A)strength is compression
B)strength is tension
C)bond strength
D)fatigue quality

Question 24

The property of metal enabling it to be drawn into thin weir is known as

A)malleability
B)ductility
C)toughness
D)plasticity

Question 25

Non-ferrous Materials

A)Market form of copper is/are
B)ingots
C)sheets
D)tubes

Question 26

The ore from which aluminium is extracted economically is

A)kaolin
B)kryolite
C)corundum
D)bauxite