Monday, 2 January 2012

Electrical Engineering Interview Questions-Part7





What happen when ac power transmitted in unity power factor

What is the difference between the electrical and electronics

What is the meaning of TRI Vector meter?

What is IGBT? Where it is used? What is the difference between IGBT and Thyristor?

When a square wave is applied to primary of a transformer then what will be output wave form of secondary


What is band pass of a transformer?

Resistance of a conductor in a close electrical ckt is practically zero why?

Why C.T secondary are rated 5A generally

Draw waveform of capacitor or inductor in a d.c ckt(during transient) with zero resistance with it(in series or parallel)also neglect resistance of wire

What is the significance of per unit impedance ?

What is the function of commutator in dc motor?

In case of delta/delta transformer if the one phase is blown out then what will be secondary line voltage ?

What is linear motor?

What is the difference between ONLINE UPS and OFFLINE UPS?

Why electric shock due to dc is dangerous than that of ac?

Why the generating voltage in India is 11kv or why is it be transmitted as multiples of 11?

How to calculate no. Of earthing pits and their diamensions? No. Of lightning arrester rods which are required to protect a building of 35 mtr?
In India which type of PLCC is used?

Synchronous motor is three phase motor,but its not self starting .why?

Why the current leads voltage in the case of a capacitor?

What is cogging and crawling?

How to select earthing conductor size of amy motor/panel etc?

What is difference between AC VVVF drive & Dc VVVF drive explain their working principle?








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