Elastomers

Long chain rubber molecules cross linked by sulphur are called elastomers

Eutectoid

A solid phase replaces the liquid phase of eutectic system. Eutectoid reaction involves transformation of a solid phase into two other solid phases on cooling and vice versa

Eutectic phase / point, Hpyoeutectic Alloy, Hypereutectic Alloy

Eutectic: An Eutectic phase diagram is obtained when the melting points of the two components of phase diagram are neither very close nor much different.

Hpyoeutectic Alloy - Alloys to the left of eutectic point
Hypereutectic Alloy - Alloys to the right of eutectic point

Expletive

When using the combination of there + be, there is called an “expletive”.

Examiner

A person who performs specific NDE on equipment but does not evaluate the results of those examinations, unless specifically trained and authorized to do so by the owner or user. The examiner may be required to hold certifications as necessary to satisfy the owner or user requirements.

Erosion

A reduction in material thickness due to mechanical attack from a fluid, expressed in inches or millimeters.

Economizer

A section of the boiler where incoming feedwater temperature is raised by recovery of the heat from flue gases leaving the boiler.

Euler's Number

It is defined as the square root of the ratio of the inertia force of a flowing fluid to the pressure force.

Entropy

Entropy is sometimes referred to as a measure of the inability to do work for a given heat transferred.

Energy

Energy is defined as the capacity of a system to perform work or produce heat.

Intensive Property and Extensive Property

An intensive property is independent of the amount of mass.

Extensive properties are those that vary directly with the mass.

Equality of two matrices

Two matrices are said to be equal if and only if they have the same order and the corresponding elements are equal.

Equilateral triangle

A triangle is said to be equilateral triangle if and only if all the sides  are equal to each other.
or
A triangle is said to be equilateral triangle if its ll the three vertices are equidistant from each other.

Exterior angle of polygon

The angle which is obtained by producing any one of the side of polygon is called an exterior angle of a polygon.

Even Number

Numbers which leave a remainder 0 when divided by 2 are called even numbers.

Equivalent Set

Two sets are said to be equivalent sets when they have same number of elements.

Emphatic Pronouns

It will be seen that here compound personal pronouns are used for the sake of emphasis and are therefore called emphatic pronouns

Equity

Equity means a part of capital of a corporate entity that is represented by

the shares of the company whether in physical or dematerialised form.

Equal Set

Two sets are said to be equal when they contain same elements.

Null Set/ Empty Set/ Phi set

The set which does not contain any element is called a null set.