Mechanical Engineering & Documents

What is the difference between Hot and Cold Chamber Die Casting? Answer :

What is the difference between EN8 and MS material? Answer : EN 8  Material MS Material EN 8 material has higher tensile strength. MS material has comparatively low tensile strength. EN 8 material applicable when high strength required. MS material is applicable when high strength not required. EN 8 material contain 0.4% C MS material contain up to 0.25% C EN 8 material is use when other heat treatment process is carried out on it. MS material is use when no need of other heat treatment process on it. EN 8 material can use instead of MS material. MS material can not use instead of EN 8 material. Material is more expensive then MS. Material is less expensive then EN 8. Let me know if there is a addition of point or correction in any point.

Difference between Annealing & Tempering is as per below. Annealing Tempering Annealing is a primary process. Tempering is a secondary process. Usually done after hardening process. Material is heated above re-crystallization temperature. Material is heated below re-crystallization temperature. Cooling process of material is take place inside the furnace. Cooling process of material is take place outside the furnace. Please let me know if there is a any query or want to add points.

Comparison of Otto and Diesel cycle is given below:

Difference between internal combustion engine & external combustion engine is given below:

Ductility and malleability are properties of metals that show specific characteristics. It is the ductility and malleability property that helps the metals to deform. Ductility is said to be the property of a material to stretch without getting damaged. Metals having ductile property can be stretched into wires. An example is copper wire. Malleability is said to be the property of a material to deform under compression. The metals having malleable property can be rolled or beaten into sheets. An example is aluminum foil. In more simple words, ductility means stretching to wires and malleability means beating to sheets, Ductility means that a metal can be changed to another form by pulling, compression or twisting. On the other hand, Malleability means that a metal can be changed into another form by beating or hitting it hard.

Engine The word “engine” comes from the Latin word “ingenue.” An engine is a device or system (electrical, mechanical, chemical, or even social, human, or political) which affects a result. For instance, a bomb is an engine, a crane is an engine, a water-powered mill is an engine, a political party is also an engine, and even a criminal gang is an engine. Gradually through the decades, “engine” became associated especially with boilers, fire, furnaces, and bombs. In short, any device which tended to get hot and explode. However, the system was still considered to be an “engine” and not just the prime mover. In the 20th century, a motor prime mover was called “the engine.” James Watt put the name “steam” in front of the engine to distinguish it from other engines of that time. Engines are basically the devices which convert any form of energy to bring about mechanical effects. These are made up of pistons and cylinders. These may be categorized into various groups according to...

Reciprocating and rotary pumps are two types of positive displacement pumps. Essentially, positive displacement pumps enable the movement of fluid from one side of the pump to another using a rotational motion. They are also called constant   flow  machines because, theoretically speaking, they produce the same flow regardless of the discharge pressure. Reciprocating and rotary pumps refer to the mechanism used in each type of pump that moves the fluid. In both types of pumps, there is an expanding cavity on the suction side and a decreasing cavity on the discharge side. The volume of liqui is constant in both cases.

Every type of fluid possesses differing amounts of resistances against deformation. The measure of that resistance is called viscosity. Viscosity expresses the fluid’s resistance against either tensional stress, or shear stress. In common terms, viscosity is the thinness or thickness of the fluid. A great example of this, is the difference in the viscosities of water and honey. Water is considered as ‘thin’, thus, the viscosity is lower. On the other hand, honey is significantly ‘thick’, and is a fluid with a higher viscosity. Viscosity can also be considered as a measure of the friction of fluids, as it also describes the internal resistance of the flow of fluid. There are two ways to report or measure a fluid’s viscosity. It can either be expressed as dynamic viscosity, or kinematic viscosity. Many are confused between these two types of viscosity expression, and some even consider them to be one and the same. In reality, they are two significantly different expressions.