There are three types of characteristics. Open circuit characteristics (OCC) or magnetisation cháracteristics (E2 versus If). Internal characteristics or total characteristics (E versus Ia). External characteristics or voltage...
Category - Electrical
DC generators can be classified according to their methods of field excitation. There are two types of DC generators on the basis of excitation. Separately excited DC generators Self excited DC generators Separately excited DC...
DC Generator : An electrical generator is a rotating machine which converts mechanical energy into electrical energy. It is shown in figure. This energy conversion is based on the principle of electromagnetic induction. According...
Centrifugal pumps are the devices which convert the mechanical energy into hydraulic energy by means of centrifugal force acting on the fluid. Centrifugal pumps are classified as roto dynamic type of pumps in which a dynamic...
In a double acting reciprocating pump, the suction and delivery strokes occur simultaneously. When the crank rotates from IDC to ODC, a vacuum is created on the left side of the piston and the liquid is sucked from the sump...
In a single acting reciprocating pumps, liquid acts on one side of the piston only. Image shows a single acting reciprocating pump which has one suction pipe and one delivery pipe. It is usually placed above the liquid level in...
The reciprocating pumps is a positive displacement pump. It operates on the principle of actual displacement or pushing the liquid by a piston or plunger that reciprocates in a closely fitting cylinder. These pumps usually have...
There are two methods of dimensional analysis used. Rayleigh’s method Buckingham π-Theorem Rayleigh’s Method In Rayleigh’s method, the expression is determined for a variable depending upon maximum three or...
One dimensional flow is the type of flow in which the flow characteristics such as velocity, pressure, density, temperature etc. are the function of time and one space co-ordinate only. Mathematically, u=f(x) ; v=0 ; w=0…...
Most of the conventional pressure gauges are of a mechanical type. These gauges embody on elastic element which deflects under the action of the applied pressure. This movement mechanically magnified and read with the help of...
