Other Electrical Engineering Interview Questions 

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IF THE LOAD OF TRANSFORMER IS GETTING MORE THAN ITS
RATING,,,THAN HOW TO OVERCOME THIS PROBLEM? SUPPOSE THEE
RATING OF TRANSFORMER IS 315KVA AND THE LOAD IS GOING
BEYOND THAN THE RATING SAY AROUND LOAD: 352KVA...
THAN HOW CAN WE SOLVE THIS PROBLEM WITHOUT DEDUCTING THE
LOAD. 
Hyundai 
13 
what is the formula for converting dc power(watt) to ac
power (watt)? 
ABB 
3 
what is the formula for calculating of dielectric strength of
transformer oil. 
Bhel 
2 
How the oil level of the Buchholz Relay come down. 

3 
How can we calculate the current if we have load in KVA and if
the load in KW then what formula will be use for calculating
the current. please give both the formula for calculating the
current. 

3 
can we use inductor in case of d.c.,if yes then what will
happen in circuit 
JSW 
3 
Which theory is used in the analysis of salient pole rotor
synchronous machines?
Who is credited for this developement?
Could the same theory be used for cylindrical rotor
synchronous machines? 

1 
WHAT HAPPEN WHEN CT SECONDARY OPEN DURING LOAD 

16 
how much earth resistance consider to commissioning the
transformer? 
DeccanCements 
3 
How we can calc. the Backup time of a battery Bank??? 
Emerson 
5 
What is the range of efficiency of thermal or steam power
plants?
Why it is so low? 

2 
We have 800KW motor operating at 6600Volt,50 Hz
supply.During 1st startup it tripped on overcurrent
trip.It's FLA is 88 Amps.The K factor of Thermal overloaaad
was set on .94 initially.then we set at 0.97 and then it
started fine.i dont understand why it tripped first?What
are the protections which comes in picture during starting ? 

6 

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