MECHANICAL ENGINEERING

  What is pump? Types of pumps and their working?  What is pump?  A pump is defined as the mechanical equipment,  that uses to transfer different fluids & gases from one place to another place,  This can be operated by many energy resources which include manual operation, electricity, engine, wind power and many more, day to day life to industrial applications. Types of pumps   There are mainly  two types of Pump  but they have various categories into it: 1. Dynamic Pump:      Centrifugal Pump: Axial flow                            Submersible pump Mixed flow Peripheral           Special effect pump: Jet pump Electro magnetic pump 2. Positive Displacement Pump:     Reciprocating Pump : Piston pump Plunger pump Diaphragm pump     Rotatory Pump: Screw pump Progressive cavity pump Gear pump Vane pump

  Here are frequently asked mechanical engineering interview questions for freshers as well as experienced engineering candidates. Top 30 interview questions and answers;  1. What are types of gears?   S pur Gear   Bevel Gear   Worm Gear   Gear Rack   Helical Gear   Screw Gear   Internal Gear 2. What do you mean by gear module? The module describes the size of gear, A pair of gears can only mesh correctly if and when the base pitch is the same. 3. What do you mean by gear ratio? The gear ratio is the ratio of the number of teeth in the gear to the number of teeth in the pinion being the smaller of the two gears in mesh.                                              EX -:   Driven\ driving = 75\25 = 3\1 =3:1  4. Why bearing are used? The bearing are used to allow rotation or linear movement and to reduce friction bet...

      MACHINE DESIGN  Introduction of Machine Design         The subject machine design the creation of new and better machine and improving the existing one a new or better machine is one which is more economical in the over all cost of production and operating the prosses of design is long and time consuming one. Classification of Machine Design  There are mainly three classification of machine design which as under: Adoptive Design Development Design New Design   1. Adoptive Design In most cases the designer's work is concerned with adaptation of existing design, this type of design needs no special knowledge and can be attempted by designer by ordinary technical training.   2. Development Design This type of design need considerable scientific training and design ability in order to modify the existing design into a new ideal by adapting a new material or different method of manufacturing.   3. New Design  This t...

BEARING What is Bearing ? A Bearing is a machine element that constrains relative motion to only the desired motion and reduces friction between moving part.      The design of the bearing may , for example , provide for free linear movement of the moving part or for free rotation around a fixed axis ; or, it may prevent a motion by controlling the vectors of normal force that bear on the moving part T ype of bearing  There are at least 6 common type of bearing     Plain Bearing.    Jewel Bearing.   Rolling -Element Bearing.    a)  Ball Bearing.      b)  Roller Bearing.   Fluid Bearing.     Magnetic Bearing.   Flexure Bearing. 1.  Plain Bearing Plain bearing are the simplest type of bearing and are composed of just the bearing surface with no rolling elements. They have a high load - carrying capacity, are generally the least expensive and, depending on the materials, have much ...

                    TYPES OF GEARS Type Of Gears   Spur Gear Spur gears transmit power through shafts that are parallel. The teeth of the spur gears are parallel to the shaft axis. This causes the gears to produce radial reaction loads on the shaft, but not axial loads.  Spur gears tend to be noisier than helical gears because they operate with a single line of contact between teeth. While the teeth are rolling through mesh, they roll off of contact with one tooth and accelerate to contact with the next tooth. This is different than helical gears, which have more than one tooth in contact and transmit torque more smoothly. Helical Gear Helical gears have teeth that are oriented at an angle to the shaft, unlike spur gears which are parallel. This causes more than one tooth to be in contact during operation and helical gears can carry more load than spur gears. Due to the load sharing between teeth, this arrangement also all...

  What Is Gear? This method are conducting power is used in a place where the space between the soft is very less, it is fitted on the top of the soft shaft, it is like an iron circular wheel and the teeth are cut on its circumference. shapes are cut parallel to each other and equally spaced. Principle of gear Gear works on the fundamental principle of thermodynamics, the law of conservation, or the first law of thermodynamics, which states that energy can neither be created nor destroyed. We can say it is conservative. It can be transformed from one form to another. We know that power is the function of the shaft's torque (force in rotary motion) and speed (P = TV). Therefore, when we connect a small gear on the driving shaft and a larger gear on the driven shaft, the driven shaft speed decreases per unit rotation of the driving shaft. As we know, power is conservative, so according to this, the torque of the driven shaft increases according to the ratio of driving gear to driven ...