Electrical Engineering Interview Questions

Will transformer heating be approximately the same for resistive, inductive or capacitive loads of the same VA rating? Explain.

11458

in a dc shunt motor what happens if motor takes high current,no speed

3708

What is stray current in DC Traction?

L&T,

5733

what is meant by armature reaction & where its happen ?

5417

Regarding units, for voltage we are denoting Volts as V but in case of current we are not denoting Ampere as A instead as I..Why..? Any technical reason for this..?

3444

how DC motor operating in detail .pls any one guide me .iam not clear idea about that .thank u

3700

what is the difference between squirrel cage & slip ring induction motor?

81781

what is ups?how its works?and what is there in static switch how it works?

Bhel,

14594

What is C curve and D curve of MCB?

GMR,

12196

how give earthing conection to household equipment?

1421

how give earthing to shif and aeroplane which is away from earth?

ABC,

3869

in thermal overload relay class 10A indicate what

13757

Size of the power cable like 1.5,2.5,4 sq.mm which area calculated from whick area or how specified the size?

MRF,

2298

why distribution transformer is uesd in Delta/Star formation?is there any significance in doing this?If yes then breif?

8179

why generation is done in delta nad transmission in star? brief

8348

Un-Answered Questions { Electrical Engineering }

Why phase sequence must be same in any ht motor or generator circuit?if phase sequence doesn't same whatever will be affect on circuit?

1651

how to control the speed to switched reluctance motor

1423

what happens if dc supply is given and the remedies for it.

1212

How to design a Unit auxiliary transformer for a power house having a unit of 65 MW and Generating voltage of 11 KV and Secondary voltage of 433V

1579

What is the formula to calculate the no load current of a single & three phase induction motor

1695

Why do we mostly prefer to generate and distribute electricity in 3 phase and not in 4 phase or 5 phase?

648

how much winding resistance of 0.75kw to 12.5kw 3ph sqwiralcage induction motor?

2338

What is the function of attenuator in cro?

642

A 500 V shunt motor runs at its normal speed of 250rpm when the armature current is 200A. The resistance of the armature is 0.12 Ω. Calculate the speed when a resistance is inserted in the field reducing the shunt field to 80% of normal value and the armature current is 100A.

1915

Why does increasing the magnetic flux in the main field of a d.c motor cause the armature current to reduce??

1426

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

1442

For RCD (Residual current device) Icu is defined. How i can find Ics for them?

1527

I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?

1244

132/66kv sub-station procation ?

1616

can we start slipring motor on star delta like we start induction motor ? if yes where will we connect ?

1433