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Electrical Engineering Interview Questions

Dear All, I am new in construction company , my boss ask a question at time of interview , If we have 60MW generation and Single Power Transformer step-up we have. if CMR 50/60MVA , ONAN, ONAF respectively , is it sufficient or not ? for that much power to transfer,

739

thyristor controlled APFC panel design parameter?

893

what is the difference between megger and earth resister ??

HMPL,

830

why T/F winding temp measurement cts are odd secondary current ie,109A/1.2A/1.4A?

848

Why is reating of t/f in kva but for inverter in kw ?

2443

Dear all, I'm manikandan I have done by DIPLOMA EEE from 2011 , I have 5 years of experience from Power plant instrumentation field , which one field is give long life & which one field is best ,I confused a lot and also I'm studying AMIE, can I choose which department from Section B examination? pls tell me

637

How to measure size of cable on a given load

898

How much load can take a 16 mm aluminum cable 3 phase

819

Why use in ht motore

739

how to calculate the size of the cable for a particular rating 3phase induction motor?

1462

please give some hindalco placement papers for written exam

860

how to make a solar panel? why solar panel cell connected to serious?

1030

We have a distribution transformer of 750KVA/11kv/440v and an AVR (Servo Stabilizer) of 750KVA on the LT side of distribution transformer. Also we have an ACB of 1200A on the output of distribution transformer (that is on the input of AVR). We want to have an MCCB on the output of AVR. What should be the rating?

SSPL,

1023

Wind mill

795

can we replace Dyn11 transformer to Yy0 transformer and what is the difference between the two type

1112

Un-Answered Questions { Electrical Engineering }

explain the what is a drive ? 0 4 which type motor r use in the celling fan..... PCB plannet 2 13 If stator & rotor of a 3-phase induction motor have different no. of poles, will the motor run or not?? types of drives Why dc supply is used for closing and tripping coil of ht breakers. What happen if we use only ups ac supply only. ACC 1 41 how the 3phase induction motor is running in 2phase supply with help of capacitor? 1 33 what is the actual difference betwen constructional details and constructional features? 1 20 how does commutator convert a.c to d.c?

3679

Give some example of fault limiting devices?

141

what is destructive and non-destructive testing of welding

700

give me applications of sequence bridges . (used in 3 phase un balanced systems)

986

how can we say that stator magnetic field rotates with synchronous speed?can we derive?

850

2- What are the percentages between excitation currents in phase (R, S and T) in ∆ and Ỵ connections in excitation Current test in transformers?

1090

what is sustainable current of any conductors . a bare busbar or pvc cable has different sustainable current .

917

What would be the size of wire used for 2 Ton of window A.C?

996

Tell me the reason of connecting domestic t/f primary in star or delta,and also secondary side.

1056

why the active power flow of some line is increased when the active power of out is cut ?

1175

2. What are the parameters of EHT sub-station?

1260

Draw a circuit diagram in which if button is open we can use socket and bulb as a series test circit and if button is close than simple we can use socket as any load purpose.

968

What is the tube exial fan?

1049

When calculation of fault current and fault Kva is to be done,why always we use per unit value and why we consider the base kva?

1001

How to calculate the sag on transmission Lines.

1904