Electrical Engineering Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

if we increase frequency of line, then how will string efficiency varies with it.

2 13096

Dear all, Can anybody tell me that how to choose CT for a specific load? I have a 200kw induction motor, which ratio CT should be installed? Is there a formula or calculation that determines the CT ratio for a load? Regards.

2 6469

How to calculate KVA/VA rating of PT or CT from primary & secondary voltage or primary & secondary current?

2426

what is the difference between control transformer and Potential transformer (PT)?

1 4473

is 3-phase induction motor need a starter ? why do it so

Coca Cola,

5 8125

what is the use of the circle diagram

2 5616

what is TRCC

2 15638

How can I calculate per unit (KWH) fuel (Gas/ Diesel both) consumption 1MW unit?

2112

what is brushless generator?

Jk Tyres,

2 5325

Can we perform parallel operation of two transformers when one transformer on load?

3 5247

dear all, can any body explain that how to select an induction motor for a specific mechanical load(inertia). is there any formula or calculation then please give me. i shell be very thankful to all of you. Thank,s and Rgard,s.

1 3121

why secondary terminal of current transformer should not be open circuited?

ABB,

4 10509

In the formula : Knee point voltage = Burden X alf / class, Please inform what is alf? regards Shashidhar M.R.

2 4248

Will an earth leakage trip be activated if the component or wiring is faulty on low voltage equipment.Example An electrical Cat Scarer placed in the garden and water gets into the wiring.

1864

which type of motor is used in lift ?

7 11191

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Un-Answered Questions { Electrical Engineering }

We are preparing another project which involves Waste heat recovery from a 1 MW GE Engine. The Engine in particular gives out flue gas at 487Deg C with a flow rate of 5650 kg/hour and this can be cooled to 180 Deg C. This gives a thermal output of ~ 594 KW that is available for input to VAM via heat exchanger / boiler. Additionally 581 KW will be available from engine jacket water (temperature profile 80/ 80 Deg C and a flow rate of 50m3/hr) Our estimation is that 300 TR of cooling is possible with a suitable VAM machine(s). Please advise what is the most suitable arrangement with maximum TR and min Capital expenditure. plz reply me as early as possible

1984

How to calculate VA rating for CT or PT or Control Transformer?

2849

can some one clearly explain why -48 volt DC use in telecom site????

1691

How does PLC work for sychronising of Two or more DG sets?

2076

why we used dc supply for field in dg set

2389

Can anybody just suggest about the scope of Electrical design with ETAP software?Just guide me?

3803

On Which Pressure PRV is operated.

1726

What is the rotor frequency of 10 Hp 1440 RPM 50HZ 415V ?

1923

why should the primary of transformer be connected in delta in a heat run test?

1982

how a flip flop can be used as a latch?

1994

write a program that prints prime numbers from 1-20 in digonal form

2003

Can u tell me design of switch yard

2173

what is the stear deltaprinceple?

1882

is it possible to say motor horsepower number without seeing name plate(when name plate damaged)

5360

What is load boxes ?

2159

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