Electrical Engineering Interview Questions
Questions Answers Views Company eMail

How to calculate flow of water delivered by pump when pressure & size of pipe line is given

Knight Frank,

999

what is the apt definition for kirchoff's current and voltage laws?

3 4836

Hi guys! Plz help me to answer the following questions. 1. What are the types of transmission line energy losses? 2. Why are the VLF are used some types of services? 3. What frequencies are used for reliable beyond the horizon terrestrial communication without repeaters? 4. To permit selection of 1 out 16 equi-probable, what is the number of bitis required? 5. What is the most common modulation used for telegraphy? 6. What is the multiplexing is used to increase the capacity of the optic fiber? Thanks

834




how define the torque in ac drive. from electrical side in the drive friquency ,voltage and current three factor is there.

814

what is the burden?accuracy?Knee point voltage? what is the Alternator of PGM?

L&T,

1443

what is the senstivity and stablity? what is different?

1 1073

what is the merz prodution ? what is the turn to turn fault?

L&T,

2 3930

what is sloop? what is meen LLB in and difine?

897




Define working of prim mover governer in alternator?

1 2646

what is the differents and advantages of Electro magnetics relay and static relay ? what is the numerical relay ? advatages?......

TCS, CAT, L&T,

7 17707

what is the different between HT auxillary relay resistance and transformer tripping relay resistance?

791

what is diffential relay? testing proceure?and transformer reach Over load thet time differencilal relay operate or not ?

5 5023

why synchronization done in clockwise direction?

Hindalco, NTPC,

11 11136

HOW GENERATING END VOLTAGE LEVEL (6.6 KV/ 10.5 KV/ 11 KV/ 13.5 KV) DECIDED IN POWER PLANT. ON WHAT FACTORS THE GENERATING END VOLTAGE DECIDED, & WHAT IS THE CALCULATION USED FOR THIS.

Cognizant, Areva,

3 15213

how to do CT Burden test

2 9814


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Un-Answered Questions { Electrical Engineering }

Is there any rule to select the voltage of motor based on KW rating? What is the rating above which lt motor becomes the HT motor?.

388


what are the things that can cause a three phase motor to crawl?

1746


why Current is lead 90 degree and voltage is lag 90 degree in a capacitor.? why Current is lag 90 degree and voltage is lead 90 degree in an inductor.?

751


what is the problem when i want to close a circuit breaker by local position it closes well.but when i close it in remote position it trips

325


What is the physical significance of phase.. i.e. what is exactly the meaning in layman's language.. 1 phase, 3 phase etc ???

795






What is warm / cold start of HT motors. How many warm start & cold start are possible in a day?

789


hello friends this is krunal here.. i have applied for he officer train in hpcl electrical stream.. any one who have applied before for electrical stream please help me out.. post ur reply to my mail id: krunal_airforce@yahoo.com.. any tips, old questions for paper or any help will do.. plz help me.. your faithfully, Krunal Darji

585


Dear Sir/Madam, I have one questions we have three steam turbines and one Gas turbine and our industry linked with the public network, we have protection system one of the protection is reverse power we can export just four MW only i would like to ask about how to calculate the reverse power. Thank you in advance best regards

811


What will happen to the protection and metering, if the polarity of a single or two PT/PTs in three phase system is reversed? Please provide reference if any.

805


What is transister define the transister ammiter ,base, colector.

819


What technology is used in latest generators?

806


How capacitor improves pf

337


1)what is the function of a frequency inverter? 2)If a few frequency inverter are connected onto a device network,what are the two setting that will ensure the frequency inverter work properly on the network. 3)whats is the name of the input sensor for weigher? 4)How to confirm that the load cellis faulty? 5)Describe briefly the steps to validate that the weigher is working properly? 6)Describe the procedure to validate the flowmeter accuracy? 7)Describe briefly the steps to validate that the tempreture sensor/transformer is working properly. 8)what is the adjustment that need to be done when you are calibrating the temperature transmitter ? 9)what are the safety measures to be taken before disconnecting motor for rewinding. 10)whats is the synchronous speed in rpm of typical 4pole 50hz motor? 11)whats is the formula for kw, ohm's law 12)if a 3phase motor is rated 3kw,415vac,what is it's rated ampere?

568


how to compute kvar in substation feeder to improve power factor and sending voltage

839


how point on wave controller works.

1137