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

Electrical Engineering Interview Questions

Questions Answers Views Company eMail

wath is skin effect?

9 12361

How many earthing pits required for diesel generator set ? Why ?

1 8604

what is the fuction of electrical transducer in control pannel?

6 8361

which is batter in construction job,ELCB or RCCB?

HCC,

7 18772

whate is aelectrical power fector for exampal

8 12752

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 10018

HOW MANY EARTHINGS REQUIRED FOR GENERATER

Juniper Networks,

10 19259

what happen when dc shunt motor field is sudden open in running condition

APGenco, Bhel, IIT, JMRC, TCS,

34 81167

if the magnetic lines can pass through a vaccuum area

1937

What Is Transformer Impedance ?

Con Edison,

6 16707

How conventional fire alarm system works?

1 2799

WHAT IS SHORT CIRCUIT STRENGTH OF 100 AMPS MCCB?

ACC,

2185

how to choose the cable rating for load (KW)? EXAMPLE.50KW load

ACC, NCUI, Polycab, PowerSol, Siemens, SW,

14 173577

whats the diff b/w mpcb and mcb?weather it trips on single phasing or not.

Electra Power, Essar,

9 18094

what are the safety measure & controls in engine?

RRB,

2 7109

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Un-Answered Questions { Electrical Engineering }

What are the advantages of instrument transformer?

1225

where solid grounding and where grounding through ngr done and why?

2645

why to use freewheeling diode ( diode in revers bias mode) across dc coil

5114

As we use capacitor bank in 3ph ckt to improve PF, can we use capacitor in single ph domestric use, in house we have Fan,Mixer,electric cooker,iron,tube choke they also lag the system,because it is inductive load. if it is possible to improve PF of single ph system-- if yes- type of capacitor to be used,connection diagram, working in detail. if no-- list it.

1849

A 230V dc shunt wound motor has an armature resistance of 0,15Ω.When operating on no load at 650 rev/min the armature current is 6A . The motor takes a full load current of 85A. Calculate the full load speed if the field flux is (i) maintained constant (ii)reduced by 0,03

2070

Mention the disadvantages of low power factor? How can it be improved?

1205

i need to give section engineer (electrical engineer) for RRB. Please suggest some book

1936

i want to learn control schedule for 11kv panel? can any one send the detailed control schedule?

2482

testing of Vector Group – YNaoD II

2991

how to find three phase complex power in per unit and MVA?

2261

What is a copper loss or i2r loss pc?

1200

i want design of D.C.MOTOR 1HP 960RPM AND 2HP 960RPM ITS URRGENT

2024

how can calculate resistance box for 15 kw, 6 pole, RV-230, RA-42 motor

3396

Application Comparison between 22KV (UE)and 33KV (E) system. Are we allowed to use 33KV (E) cable in lieu of 22KV (UE) cable. What are the technical disadvantages.

2874

What is the pro & con of having 11kv & 33kv incoming, and what is the adv & disadv. of converting from 11kv to 33kv.

2887

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