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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Why the transformers are rated in KVA ? in new view

4433

how to calculate the capacity of CT operated LT trivector meters on a particular distribution transformer.

2438

which one has maximum efficiency autotransformer or transformer?? and why??

4683

how to test reverse power trip?

3160

What is the maximum breakdown voltage of 11KVA and 66 KVA power line and how it is calculated?

1397

Why we use startor to the motor?

Bhel,

5960

how to minimize earth resistance upto 2Ω, if the resistance is 6 Ω ?

1039

Why the voltage n frequency of the incoming generator is kept slightly higher than d grid voltage n frequency while synchronization ?

9270

Advantages of using generator circuit breaker (GCB) scheme in a power station ?

4210

What is d main advantage of using double circuit 3 phase transmission ?

UHG,

1051

Which formation is better in transmission lines - horizontal or triangular and why ?

2513

Advantages of using bundled conductors ?

3138

how to find the torque of the single phase synchronous motor by doing an experiment

1140

pf of synchronius motor is unity, is it axact(=one) value. ?

2227

if the stetor speed (N S) increase by 20% then the rotor speed will be increased by 20% is it true. ?

3639

Un-Answered Questions { Electrical Engineering }

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

1715

there is an alternator 480 k.w, 400v,50hz, 4-wire running on load having leakage alternator body earthed current 38 A. is it within acceptable limit? if yes then give reference if no then how to bring within specified limit

1067

As an electrical engineer what are the responsibilities which i can hold in TCS?

1301

1)how to reduce the value of tan delta of trasformer and CB,bushing,CT&PT,CVT ? 2)how to reduce the resistance of CB contact and its operating time? 3)plz.....send me the project report on conditioning and monitoring of substation equipment on my email id (gusaiyogendra03@gmail.com)

1329

Can we Co-ordinate relay in Load Break switch?

1047

Iin ESP why positive is grounded ? why not negative ?

1442

Will any motor burn if voltage provided is lesser than the rated voltage???? If yes, then how is speed control possible with voltage control

1300

What will happen to the protection and metering, if the polarity of a single or two PT/PTs in three phase system is reversed? Please provide reference if any.

1289

What is the function of interposing current transformer?

214

Determine the BTU size of an aircon for 20 sq metre room

1039

what is the difference b/w UHVDC and HVDC(LIGHT)?

3459

During regenerative breaking= A rotating magnetic field is reversed B slip is positive C torque is positive D slip is negative

1151

for 100 HP Induction motor service factor is 1.2(SF) we placed a VFD at the motor side load is balance with 0.3 Amp's Phase to Phase but at incoming of VFD load is un-balance with 10 to 20 Amp's what will be cause of load un balance

967

what is the Transformer Impedence?How can calculate?

1045

how can we find thae value of capacitor for single phase motor. what is difference between starting capacitor and running capacitor.

1490