Electrical Engineering Interview Questions
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For these 2 devices what their power ratings are ? 1) single phase : AC 220V & starting amps 3Amps (i.e. starting torque) and the stabilized amps 2A ... For deep freezer 2) single phase : AC 220V & starting amps 2.7Amps (i.e. including the starting torque of a CRT monitor) and the stabilized amps 1 Amps thanks

1 2558

We have .ht motor which is 60Hz.we run on 50Hz.so that it's speed reduce but we had one prob.that motor winding temp increase up to 135 deg.we want reduce this temp.what to do?we arrange ext.cooling fan but not much effect.we want reduce this temp. Inhouse without affecting much.cost. also don't want reWINDING OF MOTOR?

3 3728

how many ampere Maxmium load given on a 10 kva DG set?

3 6369

Why did lightening arrestor solid copper rod head is sharp on mobile tower top?

1508

If a transformer primary winding operates at 240v, the secondary at 120v and the load is 1500w & the transformer is rated at 92% efficient, what's the current flowing through the primary winding of the transformer? What is the formula for finding this?

1708

What is the reason for using a GE G101 MCB in place of an EP102 MCB if both are capable of AC circuit protection?

2122

how to find out this one mcb r mccb?

L&T,

4 5962

how to identyfy cable sizes?

IAF, Mylan,

4 5684

What will happened, if field voltage change with 220 voltage to 110 voltage for a dc shunt motor?

1 2572

what is the deference between watt and KVA

IAF,

3 4604

what is the difference between phase and neutral?

IAF, Indian Airlines,

3 6135

How generator NPS(NEGATIVE PHASE SEQUENCE TEST)TEST WAS DONE? PROCEDURE WITH DETAILS?

1690

How much minimum insulation required between 11kv/3.3kv transformer windings?

Descon,

1944

what is Use of Stones/Gravel in electrical Switch Yard??

Sanghi,

4 14704

How to find synchronous motor speed formula Ns=120f/P ?....

Cranedge,

2 21390


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Un-Answered Questions { Electrical Engineering }

How to use computer cpu ups use for home inverter circuit board

1265


In a carnot engine with an efficiency of 40%, the heat rejected to the sink at 27 C is 60 kJ, then the heat supplied in kJ to the engine by the sources is

643


I want formula to calculate cable size as per load given in length & amp. I searched many sites but didn't right answer. Please reply me asap.

1018


differnce between single acting and double acting solenoid valves

1381


what is the relation between knowing of the distance between power transformer and the capacitor feeder in case of parallel operation

1435






Graphs of measuring power and speed on dc motor

1430


What are the various types of BUSBAR Schemes? explain each

4545


In a flange coupling, the flange bolts are designed for

673


Why we make earth connection with Transformer Body and What will be the minimum size of copper wire as per code with respect to KVA rating of Transformer?

1265


What is the main cause of magnetism?

1559


1.why should we connect the measuring instruments in l.v side in short circuit test of a transformer? 2.why the power factor is less in open circuit test of a transformer?

1575


What is the purpose of using busbar mounting fuse?

1580


If a shunt Dynamo has induced emf 100V and 0.4 ohm resistance and battery of accumulator of open circuit emf 110V and 0.5 Ohm resistance are in parallel what is common terminal potential difference?

4073


In constant power region of 3-phase IM torque-speed characteristics, if frequency increases flux A does not alter B decreases C increases D none of above

1728


can u tell me the promotion from oiller to enginer

1401