Surjeet Sankararaj

I am a mechanical engineer with a passion for technical stuff. I am the founder and former editor-in-chief of Mechteacher.com.

Gas Laws

Gas Laws

Gas laws are laws that explain the behaviour of an ideal gas. The following are some of the important gas laws: Boyle’s law Charles’ law Amontons’ law Joule’s law of internal energy Regnault’s law Avogadro’s law 1. Boyle’s Law: Boyle’s law states that the volume of a given mass of gas (V) is inversely proportional [...]

Derivation of air-standard efficiency of Otto Cycle

Derivation of air-standard efficiency of Otto Cycle

In my previous article, I gave a short introduction to Otto cycle and discussed the processes in it. In this article, I will derive the air-standard efficiency of Otto cycle. p-V and T-s Diagrams of Otto Cycle: p-V Diagram T-s Diagram Basic terms used in derivation of air-standard efficiency of Otto cycle: Total Cylinder Volume: [...]

Mechanical Properties of a Metal

Mechanical Properties of a Metal

Mechanical properties are properties that are associated with the ability of a metal to resist loads. They heavily influence the characteristics of a metal. The following are some of the important mechanical properties of a metal: Elasticity Plasticity Ductility Toughness Malleability Strength Stiffness Creep Resilience Hardness Elasticity: Whenever an external force is applied on a [...]

Machine Design - An Introduction

Machine Design – An Introduction

Machine design is defined as the use of imagination, scientific principles and engineering techniques to create a machine or structure economically, in order to satisfy the requirements of a customer. Machine design is the first step involved in creation of a machine. It gives the basic idea of how a machine will look and function. [...]

Otto Cycle - Processes with p-V and T-s Diagrams

Otto Cycle – Processes with p-V and T-s Diagrams

Otto cycle is a gas power cycle that is used in spark-ignition internal combustion engines (modern petrol engines). This cycle was introduced by Dr. Nikolaus August Otto, a German Engineer. An Otto cycle consists of four processes: Two isentropic (reversible adiabatic) processes Two isochoric (constant volume) processes These processes can be easily understood if we [...]

Introduction to Lathe

Introduction to Lathe

Lathe is a machine tool used to remove unwanted material from a given workpiece to get desired shape. It is generally used for machining cylindrical workpieces. This article gives you a short introduction to lathe and explains its working. Origin of Lathe: The origins of lathe can be traced back to Ancient Egypt and ancient [...]