Electrical Engineering Interview Questions

why should we india maintain frequency of 50 Hz.

5287

what is the capacity of storing mass electricity.

1664

In a distribution system,having 3phases & 1 nuetral.ecah phase to neutral is 230V,line-line voltage is 440V,but what is the voltage of each line.but it should obey the KVL law.

2113

How can i calculate heat load ?

NSN, DSSR,

6756

why should we connect the no load components in a equivalent circuit of transformer in parallel?why cant it be in series.

4035

what is the working principale of air circuit breaker ?

5467

hi friends this is a newcomer in your community of enthusiastic peoples. i am preparing for SSC (CPWD JUNIOE ENGG EXAM FOR ELECTRICAL) pls guide me on the same how to crack it? PLS LET ME KNOW IS ANYONE THERE WHO PASED IT? CAN I GET THE QUESTION PAPERS OF PREVIOUS EXAMINATIONS?

723

What is the meaning of Insulation H for transformers????

930

1.Defination of Graund earth and neutral 2.

5153

what is Ith current?

19504

Why current Transformer is rated by 100A/5A/5A?

4186

why measure the gravity in battery?

2619

define B types and C types in MCB ?

Bhel,

8227

1 tr is equal to how many Kw .is there any specific formula for this to get the result .

Cipla, NSN, LG,

102604

Can anybody tell abt concrete encased earthing or grounding?

748

Un-Answered Questions { Electrical Engineering }

I have 2 KW electric water heater.I am gonna use it in controlling water temp.so I needed to increase or decrease the heating capacity.is there any electrical-electronic circuit for varying the resistance & so current?

1544

How CFL &T5 tube light glows?

802

3ph motor running with unequal kw and different pf what are the reasons

294

what is the principle of the single phase energy meter? and,what is the advantages and disadvantages of single phase energy meter?

2897

how generator avr give to the input?

620

What are factors to be considered while we selecting the Core Balance Current Transformer for Earth fault protection

611

How to calculate the phase to phase clearness of HT /// LT bus bar?????

806

How to Decide the Location of Earth pit for Compressor in Oil Depo? and How to measure the resistance of earth pit Pls explain me with the help of Circuit Diagram?

957

How to calculate no of EARTH PIT? Describe the formula as per IS standard?

2289

1- XC and the RC time constant are both measures of the reaction of C to a change in ____? 2-The power factor is a numerical ratio with a value between 0 and 1 equal to the ______________ of the phase angle. 3-When V and I are out of phase because of reactance, the product of V times I is called ______________ power 4-For _____________ inductors, the branch currents can be added algebraically. 5- The ______________ power in watts can be calculated as I^2R 6-Calculate XL with L = 30mH and f = 1kHz ( I have Xl=2piFL 2*3.141592653*1kHz*30mH =188 ohms Please check) 7-A parallel RL circuit has the values, R = 5kohms, XL = 5kohms. A voltage source of Vt = 10Vrms is connected in parallel to R and L. Determine the total current, It delivered by the voltage source Vt. 8-A series RC circuit has R = 1Mohm and C = 1microF. How long would it take for the capacitor to fully discharge if it is initially fully charged? 9-A circuit has real power = 300W and an apparent power of 500VA. Determine the power factor and phase angle. 10-The time constant for an LR series circuit is T = 0.1s and R = 10ohms. Calculate the inductance L.

1950

why the voltage and current in a long transmission line are called travelling wave?

1042

HOW TO CALLICULATE RESITENCE,REACTANCE AND IMPEDENCE VOLTGE OF TRANSFORMER 13.33 KVA 144/240 VOLTS 93/56 A WITH FORMULA

592

dg earth connect only in the amf panel or not why

764

What are the types of excitation system?

640

What is dynamo?How it works and what is the function of dynamo in a DG.

749