electricalengineeringquestionanswer

  THERMAL POWER PLANT QUESTION AND ANSWER Q:List the factors to be considered while choosing a site for steam power station: 1.Supply of fuel 2.Availability of water 3.Transportation facilities 4.Cost and type of land 5.Nearness to load centres 6.Distance from populated area Q: Explain the working of thermal power plant. It uses coal as the primary fuel to boil the water available to superheated steam for driving the steam turbine. The steam turbine is then mechanically coupled to an alternator rotor, the rotation of which results in the generation of electric power. Q.Why the preparation of coal is necessary? The coal from coal nines cannot be directly fed into the furnace. Proper preparation of coal should be done before feeding the coal to the furnace. In the coal preparation, the coal passes through the different equipments like 1. Crushers 2. Sizers 3. Driers and Magnetic Separators. Q:What is superheater? A  superheater  is a device used to convert saturated steam ...

Q: What is a Transformer? A:   A transformer is a static device which can transfer power from one circuit to another at same frequency.  Q: How Does a Transformer Work? A:   Transformer consists of two coils.If one coil is connected with ac voltage source then it will produce alternating flux in the core. Most of the flux is linked with second coil hence mutually induced emf will produce in the second coil as per faraday's law of electromagnetic induction. Q: Can DC be applied to transformers ? No i) Transformer works on Faraday's law of Electromagnetic Induction for which current in coil must change. If DC is applied current will not change and transformer will not work. ii) Practically winding resistance is very small. For DC ,inductive reactance is zero and frequency is zero. Therefore impedance is low. Thus winding draws more current which may damage the winding.  Q: Give symbolic representation of transformer.   Q: What are the various types of Transformers...