### What is Least Count and how to calculate it

Least count of an instrument is used to select right instrument for your applications. For example if you are selecting an instrument to measure a dimension 6.2 ± 0.25 mm. You can not use ruler. In this article we will discuss what is lease count and how ...

### What is Strain in Mechanics – Strength of Material

When a force is applied to a rigid body, It changes its size and shape due to internal mechanical stress acting on it. This change is length is represented by strain. In this article we will discuss what is strain in mechanics, it's type and how it is cal ...

### Stress Strain Curve : Strength of Materials

Stress Strain curve represents the behavior of material when an external force is applied to it. This diagram is used by product design engineers during material selection and structure design calculations. In this article we will discuss "Engin ...

### What is Poisson’s Ratio : Strength of Material

When an external force is applied to a body. It's length changes in the direction and perpendicular to applied force. Poisson's Ratio is a constant used to determine Mechanical Stress and deflection in a body. In this article we will discuss what is Poiss ...

### What is Mechanical Stress : Strength of Material

When a force is applied to a rigid body, It changes its size and shape due to internal mechanical stress acting on it. In this article we will discuss mechanical stress acting on a body when an external force is applied to it. We suggest you also read thi ...

### Why 2nd and 4th angle Projection is not Used

Because of the limitations of second and fourth angle projection system. Only First and Third angle projections are used for making engineering drawings. In this article we will discuss the limitations of 2nd and 4th angle projection.To understand why 2nd ...

### First Angle and Third Angle Projection : 1st angle vs 3rd Angle Projection

First angle and third angle projection are types of Orthographic projection system. They are used to draw engineering drawings. 1st angle projection system is more popular in European countries. Whereas 3rd angle projection is more popular in north americ ...