Electrical Engineering Interview Questions and Answers
Question - 41 : - How Many Types Of Colling System It Transformers?
Answer - 41 : -
- ONAN (oil natural,air natural).
- ONAF (oil natural,air forced).
- OFAF (oil forced,air forced).
- ODWF (oil direct,water forced).
- OFAN (oil forced,air forced).
Answer - 42 : -
Stepper motor is the electrical machine which act upon input pulse applied to it. it is one type of synchronous motor which runs in steps in either direction instead of running in complete cycle.so, in automation parts it is used.
Question - 43 : - Why The Capacitors Works On Ac Only?
Answer - 43 : -
Generally capacitor gives infinite resistance to dc components(i.e., block the dc components). it allows the ac components to pass through.
Question - 44 : - What Is The Difference Between Surge Arrestor And Lightning Arrestor?
Answer - 44 : -
LA is installed outside and the effect of lightning is grounded,where as surge arrestor installed inside panels comprising of resistors which consumes the energy and nullify the effect of surge.
Question - 45 : - Enlist Types Of Dc Generator?
Answer - 45 : -
D.C.Generators are classified into two types:
- separatly exicted d.c.generator.
- self exicted d.c.generator.
- which is further classified into;1)series 2)shunt and compound(which is further classified into cumulative and differential).
Question - 46 : - Why Syn. Generators Are Used For The Production Of Electricity?
Answer - 46 : -
Synchronous machines have capability to work on different power factor(or say different imaginary pow varying the field emf. Hence syn. generators are used for the production of electricity.