Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Briefly describe means used by electricity suppliers to influence the flow of active and reactive power in power networks (one for each type)?

1500

what is the advantage and disadvantage of billing in kwh and kvah by electricity board .

Nespak, NTPC,

6 36261

what is the chemical name and formula of refrigarent R-134a.

Blue Star,

1766

what is the load amp of a 2 hp single phase motor?

6 7662

electrical resistance in human body?please dedails quick. mail.psrinivasan20@yahoo.com

CTS,

2 4856

what is the reason of battery voltage is 12v maintain?please answer me.mail-psrinivasan20@yahoo.com

CTS,

1 4584

what is the maintain in ACB,VCB,MCB,MCCB breakers?

CTS,

4 13683

When the DG is running at the time we can connect to capacitor banK? why it is required or not

1 2083

10 tube light connect in mcb breaker.one tube light is fault.so breaker is tribe.how fault is rectified.(using 3wire phase,earth,neutral)

CTS, Jindal,

2139

Describe how a salient pole / projecting pole rotor differs from a cylindrical rotor and state the application of each rotor respectively

3 4818

How to calculate KW saving for power factor correction from 0.92 to 0.98 at 350KW load?

Heidelberge Cement,

5 12540

why are distributed windings generally used in alternators?

2282

why fractional pitch winding generally used in alternators?

TATA,

2437

why are laminations used in constructing the field core?

3 6715

How is the connection of the tap changer on the HV side been made?

1500


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Un-Answered Questions { Electrical Engineering }

What are the protection required for Transformer, motor, Line, Generator, capacitor, that all i have to refer which standard?(Like Transformer detail IS 2026)

1443


Whether it is possible to measure energy at the input of rectifier transformer (12 pulse with very high odd harmonics)

1455


how unidirectional torque is produced in DC motor?

6283


transformer spections :: input voltage 0-110-230v; output volage 0-10-12-14v; amp=3A using CRNO CORE, capcaity=50VA primary turns = ? ; secondry turns =?

1646


Why do we avoid electrical conduits in floors at apartments?

1614






My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I -    is the value of AC fault current. t -    is the operating time of disconnecting device in seconds. K –  is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.

1433


WHAT R THE SAFETIES IN A HIGH TENSION PANEL N LOW TENSION PANEL. ALSO WAT SAFETIES R THERE IN A 200 KVA TRANSFORMER?

1809


cc of scorpio?

1763


Z transform is use when system is not a) converges b) diverges

1167


1.Can we use 6.6/11KV 300sq mm xlpe 3core cable for LT use (415 Volt). 2. If we use it for LT then what is the current rating

1209


What is the meaning of C1, C61, C91 cable

2808


A 3-PHASE TRANSFORMER IS USED TO STEP-DOWN THE VOLTAGE OF A 3-PHASE, 11KV FEEDER LINE. PER-PHASE TURNS RATIO IS 12.FOR A PRIMARY LINE CURRENT OF 20A, CALCULATE THE SECOUNDRY LINE VOLTAGE, LINE CURRENT AND OUTPUT KVA FOR FOLLOWING.A)STAR- DELTA.B)DELTA-DELTA.

2437


Define bibo stability.

645


33kv Rated output avilable in market (any where in india)

1617


What is difference between isolator and circuit breaker?

607