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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is earth fault relay 64T, why it is used in main Incomer and neutral CT of Transformer.

2444

can we use ps class in combination with protection class in differential protection and over current protection.

1 1867

What is the output of a transformer..??

Jindal,

1 3531

What device is use for metering current at lt consumer end..??

Power Grid,

2 5177

How many devices can be connected in one zone of FACP

1619

what is interference

L&T,

1 2176

What is the maximum current carrying capacity for both copper and aluminium cables for 1sqmm?

2 3217

HOW TO CALICULATE THE LEAD ACID BATTERY AH AND HOW TO FIND THE 1.2KVA UPS BACKUP @ 1000WATTS LOAD?

2 3125

WE HAVE THE DC RECTIFIER 1500A, INPUT VOLTAGE IS 3 PHASE. HOW TO CALICULATE THE LOAD? 3 PHASE SIDE EITHER dC SIDE. PLEASE SUGGEST ME

1243

I HAVE 2 nO'S OF SYSTEMS, HOW MUCH UPS CAPACITY REQUIRED ALONG WITH 400WATTS ANOTHER LOAD? PLEASE GIVE THE FORMULA?

1 2616

can i connect wavetrap in 2 different phase in EHV line?

1197

what is ALF and ISF in current transformer?

1 10468

how can i use REF and diffrencial relay both in 1 CT core for transformer protection?

1162

can i connect REF and Differencial relay in 1 CT core for transformer protection?

1282

What is grid collapse? what is the reason for it?

1361


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Un-Answered Questions { Electrical Engineering }

What is the difference between the impedance percent and impedance voltage ?

1553


what are the preventive maintanance actions taken for air circuit breaker? please answer me

1383


What are the characteristics of negative feedback?

444


What happen to generator if i have unbalanced load?

1451


what is meant by re-rolling motor? how it differs from standard motor?

1306






i have gear oil pump with single phase motor.some time its motor starts running in reverse direction rather than forward direction...whats the reason behind this issue. 1- either capacitor is week? 2- or winding is week?

673


How the frame size of a flange mounted AC induction motor is calculated?

1351


TYPE'S OF BREKAR ,WHAT IS TRANSFORMAR & SAFTY. STARTER DOL & STAR DELTA STARTER.

1934


How do we calculate the maximum amount of current in a 300 SQ.MM cable ?

1432


How to calculate the sag on transmission Lines.

2216


how to calculate current and voltage in a same circuit?

1503


What is gain margin?

468


What is milivolt dop test in Busducts? What is its significance & procedure to do the test?

1408


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

1475


what happen as when voltage drop(or may decrease) ? in case of atomic base theory?

1346