Category: Mechanical Engineering

Zeroth law of thermodynamics: It states that when two systems have equality of temperature to a third system, they in turn have equality of temperature with each other. e.g. Suppose three are three bodies A, B and C. If body A has the same temperature as that of B and C then bodies B and […]

Work power & energy: Work: Work is said to be done if we apply force on a body and the body moves in the direction of force applied. The work can be calculated by the product of the force and the distance through which a body moves. i.e.                               Work done = Force (F) X distance (d) […]

Welding: The process of joining two similar or dissimilar, metals or non-metals, with or without the application of heat, with or without adding a filler material is known as welding. The welding process can be divided into three types. Fusion welding: It is a process of joining two pieces of metals by application of heat. The […]

Wave motion: The wave can be defined as the disturbance traveling in a medium due to the vibratory motion of medium by virtue of elasticity and inertia. Types of waves: Transverse waves:- In these waves, the particles of medium vibrate perpendicular to the direction of propagation of waves. Longitudinal waves:- In these waves, the particles of medium […]

Ultrasonic machining (USM): Ultrasonic waves are sound waves which propagate at a frequency, beyond the human ear to respond. The vibrating tool oscillating at ultrasonic frequency is used to remove the material from work surface. Slurry of abrasive particles is drawn in between tool and work surface. The tool is pressed against the work piece […]

Thermodynamic Systems: Thermodynamic System: It is that part of the universe which is under consideration. There are following types of thermodynamics systems. Open system: In this types of system the transfer of energy as well as the mass takes place between the system and the surroundings. eg. Air compressor. Closed system: In closed system there is no transfer […]

Stress: When we apply an external force on a body, it tends to undergo deformation. The body will resist the force. The internal resisting force is equal and opposite of the external applied force. This internal resistance is known as stress. So a stress can be defined as The internal resistance offered by a body […]

Strain: When we apply a force on a body it will undergo deformation and its length will increase or decrease. Length increases when the force is tensile and decreases when the force applied is compressive.    The ratio of Change in dimension to the original dimension is called strain. Strain = ε = Change in dimension/original […]

Soldering: It is a method of joining two similar or dissimilar metals by means of fusible alloy or metals called solder. The melting point of filler metal is below 450°C. It is used for obtaining a leak proof joint or a low resistance electrical joint. Soldering is of two types. Soft soldering: It is used […]

Second law of Thermodynamics: According to Second law the engine based on the cyclic process is not possible in which we can convert all the heat into the work. There are a number of statements for the second law but the two most common statements are. Kelvin plank statement Clausius Statement  Kelvin plank statement: No process […]