Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (l/20th of ordinary metals)?

Materials and Construction
Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (l/20th of ordinary metals)?

Chromel

Invar

Alumel

Constantan

Chromel

Invar

Alumel

Constantan

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Materials and Construction
Pure nickel is

Not resistant to oxidation at high temperature

Having h.c.p. crystal lattice

Ferromagnetic above its curie point (i.e., 415°C)

Ferromagnetic at room temperature

Not resistant to oxidation at high temperature

Having h.c.p. crystal lattice

Ferromagnetic above its curie point (i.e., 415°C)

Ferromagnetic at room temperature

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Materials and Construction
Aluminium storage vessel can be used to store

Aqua regia

Hydrochloric acid (10%)

None of these

Ferrous sulphate

Aqua regia

Hydrochloric acid (10%)

None of these

Ferrous sulphate

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Materials and Construction
Thermosetting resins are those polymers, which

None of these

Do not take on a permanent set

Allow slip to occur between molecules

Do not increase in plasticity with rise in temperature

None of these

Do not take on a permanent set

Allow slip to occur between molecules

Do not increase in plasticity with rise in temperature

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Materials and Construction
Cementite is

A compound of carbon and iron

All of these

Characterised by an orthorhombic crystal structure

Fe₃C chemically

A compound of carbon and iron

All of these

Characterised by an orthorhombic crystal structure

Fe₃C chemically

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Materials and Construction
A material capable of undergoing large permanent deformation, when subjected to tension is termed as

Brittle

None of these

Friable

Ductile

Brittle

None of these

Friable

Ductile

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Materials and Construction

Materials and Construction Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (l/20th of ordinary metals)?

Materials and Construction Pure nickel is

Materials and Construction Aluminium storage vessel can be used to store

Materials and Construction Thermosetting resins are those polymers, which

Materials and Construction Cementite is

Materials and Construction A material capable of undergoing large permanent deformation, when subjected to tension is termed as

Materials and Construction
Which of the following is universally employed as the low expansion metal in the bimetallic thermometer, which is an iron-nickel alloy containing 36% nickel and has very low co-efficient of expansion (l/20th of ordinary metals)?

Materials and Construction
Pure nickel is

Materials and Construction
Aluminium storage vessel can be used to store

Materials and Construction
Thermosetting resins are those polymers, which

Materials and Construction
Cementite is

Materials and Construction
A material capable of undergoing large permanent deformation, when subjected to tension is termed as