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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

what are the effects when the frequency is decreased in any ac machine

1 3751

what are the effects when a salient pole alternator is run at high speed like 3000 r.p.m?

2388

Is there any type of starter for DC motor other than two point,Three point and Four point starters?

1991

What is the Diesel consumption between 82KVA DG Set and 180KVA DG Set for 1 hour.

1 4000

Whether we used insulated line for 33KV supply. what we called it.

1 3801

Why we use 2core cable for Dc motor.Can I use 3core?

JK Paper, Maharaja Whiteline,

5 8487

what is closing resistor in circuit breaker? why it used?

3 17330

HI FRIENDS,MYSELF & MY GROUP OF FINAL YEAR ELECT ENGG. ARE MAKING A 50/3HZ,5HP,1000RPM,440V SALIENT POLE SYNCHRONOUS GENERATOR.COULD ANYONE OF U TELL ME WHAT COULD BE THE ADV. & DISADVANTAGES OF MAKING SUCH A LOW FREQN.GENERATOR/

2 4304

why cannot we use a freuency more than 400hz is used in aircrafts?

1 4285

what is charger supervision and control supervision?

2023

what is Over current, earth fault (O/C+E/F) ?

2 6884

what is differentila pilot supervision in the incomer control panel in the power station?

2054

what is the use of surge suppresser in 33 KV incoming panel. where it must be installed,inseries with incoming cable surge suppresser must be at incoming of the breaker are outgoing of the breaker

Siemens,

1 5349

How will polarity test of Dy5 Transformer ?

2220

Can i use to 3 phase 4 wire energy meter inplace of 3 phase 3 wire energy meter ?

4 7017

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Un-Answered Questions { Electrical Engineering }

i have flexible wire. size of conductors is 0.190 mm & no.of conductors are 48. then size of wire comes 1.37 sqmm instead of 1.5 sqmm . the what is tolerance for this size.

1753

What is the use of iron core in a transformer?

1083

how can i get the formula to find out the cable size if i know the load of main fuse protection.

1905

ELECTRICAL ENGINEER TEST IN FEWA ANY ONE HAVE KNOWLEDGE ABOUT THIS?????????

998

1. The DC generaror,s induced output emf is connected with a DC motor(as load). when increasing the load of the motor by using brake drum or any way. what are the parameters will changes in both motor and generator(voltage, current, resistance, frequency, speed, torque, power, flux etc...) 2. Similarly for AC generator and AC motor 3. similarly if using DC batteries instead of DC generator, What happens?

2244

george phenomenon of synchronous machine

7494

Why different Pressure switch used in marine boiler water circulation system

1729

What is critical disruptive voltage?

1282

what is the difference between earth leakage and earth fault?

2261

How many energy meters can be connected on a 15VA Voltage transformer. please send a calculation sheet.

1893

Could Please Explain briefly. Why used stabilizing resistance series with High impedance bus differential protection relay.

1739

how will we calculate the copper wire load..

1896

the grid connection required for a 50 MegaWatt fotovoltaic powerplant is higher or lower than 35kv (high or medium tension)?

1809

How npn and pnp transistor works

1085

What will be the impact on motor performance if a LT motor is rewound with changed motor winding data as given below:- Original winding data: total 04 wires = 02 wires of 17 SWG + 02 wires of 16.5 SWG. Changed Winding data: total 03 wires of 15.5 SWG wire size Motor rating: 160KW, 740RPM, 415V, ID FAN application. Normal Running Current = 95% of FL Current.

1982

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