Electrical Engineering Interview Questions

Why the transformers are rated in KVA ? in new view

5352

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

3167

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

5499

how to test reverse power trip?

3904

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

1835

Why we use startor to the motor?

Bhel,

7459

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

1473

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

11701

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

4763

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

UHG,

1450

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

3290

Advantages of using bundled conductors ?

4262

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

1536

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

2916

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

4863

Un-Answered Questions { Electrical Engineering }

before transformer oil dielectric strenght tests are taken the oil should be allowed to settle to remove option 1 air bubbles 2 gasses 3 contamination 4 water

1214

In a flange coupling, the flange bolts are designed for

720

After doubling voltage from solar cells & use step down voltage transformer can we get high current output with low voltage.

1502

Differentiate between digital phase converter and ordinary phase converter.

785

What is difference between safe PLC and normal PLC

1012

How to protect a Dosing pumps/any sensitive equipment (single phase) from surge protection inside a food factory.

1297

1.why are not using acb 33kv ht side? is there any problem 2.what is difference between acb,vcb,sf6 breackers? 3.what is the function of invertor and convertor in ups?

1701

why do we not use equivalent voltage source in negative sequence equivalent ckt.

1626

What is the purpose of using busbar mounting fuse?

1616

list the type of vfd? wich is sutable for heating kiln?

1626

what will be the effect if you were using different brands of outlets?

1488

How much kv gas generator is needed to run 2 hp and 1 hp airconditioners, plus a refrigerator and 4 Tvs

4429

What are the necessary solutions needed to be carried out on a malfunctioned earthing mechanism of a VACUUM CIRCUIT BREAKER.(TAMCO)

1551

What effect does a very low impedance have on the Voltage regulation? On the short-circuit current?

5846

How many kinds of E.L.C.B and how to work E.L.C.B

1621