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Electrical Engineering Interview Questions

why HT armoured cable does not glanding

TCE,

3152

AC SUPPLY HAVING 230 V FREQUENCY REDUCED ZERO IF MEN TACUCHES THE SUPPLY WEATHER HE GETS SHOCK OR NOT?

5941

What are the drawbacks of HVDC system?

3410

I have 380.KVA Volva Penta DG set. Tell me how to calculate units from KWH reading....

4417

I have 380.KVA DG set how to Calculate the units from DG.

9841

While performing load test on DC SERIES MOTOR, does the voltage decrease slightly. Why?

4537

what is the difference in using the 125% and the 250% factor of safety in calculating circuit breakers capacity for motors,which is more reliable to use the 125% or 250%??

2868

sir , what happen if we decrease ( approx 3 inch ) the lenth of shaft in 110KW Induction , three phase motor. actually a 110KW motor is couppled with star couplling to 120TR compressor. When we doing maintenance in compressor it is required to skid the motor backword and resulting dis- alightnment . so we want to change the tyre coupling in place of existing coupling. so it is required to cut off the rotor aprox 3 inch form driving side.

2467

what will be the difference on output when 3phase I.M. is given a delta or star supply?

3065

The following equipment are installed ia a plant 1. 110KW Induction motor 4 Nos 2. 30 HP motor 3 Nos 3 15 HP Motor 3 Nos 4 7.5 HP motor 4 Nos what is total load of plant if one of each is stand by.

3491

what use can we make of 3rd harmonic component

10173

What is 100% protection of generator? Why 95% protection is used not 100%?

NTPC,

33565

What are capacitive,resistive,inductive surge absorbation? What is ferranti surge absorber? What is lagrangian cost? What is Px operator?

998

how the voltage between all the three phase is zero can any body explain me

4234

what is the difference between energy efficient and high efficiency motors

4251

Un-Answered Questions { Electrical Engineering }

Capacitor is load free component but why ampere meter shows current when capacitor bank breaker close?

200

What are the classifications of heating element?

1074

which motor have relatively high power factor and what is reason for have high pf? 1.capacitor run motor 2.shaded pole motor 3.capacitor start motor 4.split phase motor

952

How can we calculate the KVA rating of a Distribution transformer from its core details?

1139

What is the test block protection relay if any body know plz explained

575

what is die electric strnth of transformer ?

1171

What is a surge supressor why its is used in synchronous generators

1113

What is the current carrying capacity of 0SWG,3SWG,10 & 12 SWG solid bare overhead copper conductors?

2422

if voltage bt phase & nutral is 38v in a panel board . whats the root cause.

1302

how we can do the insulation on secondary of ct explain and so that tan delta will within limit

1025

What is the permissible limit of shaft voltage for 6.6 KV motors ? Why? Is there any standard is available?

1472

Define unilateral circuit?

190

How work of capacitor in dc supply...???

589

what is KA rating and how can we choose switchgears on applications

478

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

1088