Electrical Engineering Interview Questions

sir i have applied for isro-09. still i did not got the HALL TICKET.

3126

where we use stardelta starter and dol starter

HCL,

15450

how to calculate the kw, Amps consumed by a capacitor, give me the formula for KVAr into capacitance,KVAr into KW & KVA, Amps

7305

Why thwe Direction of Rotation of a TABLE Fan & CEILING Fan are different?

13879

what is the meaning of ceiling voltage in Generator exciter?

8362

why star point of motor shall not be grounded?

15684

Please tell me 1 ton = How many Kilowatt (Electrical)

102190

what are the electrical components required for run the motor pump including safety components plz explain it how we can use such components .

3688

i heard that power factor(PF) is the main concern for industries, if they are maintaining PF around 0.6 they will be fined for that. now the question is, how can they improve the PF ranging between 0.9 to 0.95 which is safe for them i,e escaping from the fine?

5797

defination of a.c filter

1588

defination of controlled shunt reactor

1717

defination of generator

7655

defination of lines

1467

4126

defination of reactor

5988

Un-Answered Questions { Electrical Engineering }

how can calculation ate Amps for cabel. Ex-for 1sqmm wire hou many amps we can draw

1921

How npn and pnp transistor works

559

As we use capacitior bank in 3ph ckt for improvement of PF, why not we use capacitor in single phase domestric use, at our house their are many inductive equipments,like fan,mixer,tube choke,air conditioner they also draw PF... by using capacitor can they improve PF. if yes--what are advantage and how to connect a capactor in single ph,and which type of capacitor if no- what are disadvantages.

1306

what is the use of the puls transformer in UPS & how it works???????????

1593

'documenˁ

1449

gas turbine genrator reactances

1425

how can we change the polarity of Alternating current rapidly? how frequency of ac can be controlled and changed easily?

1506

what is excitation/

1649

What is main cause of cable's terminal point burned in Lug on high temperature although lug and cable selection is ok as per stantard and also tightness is ok as per situation. so please take in deep and tell correct answer thanku.

7145

what is mean by Digital Logic Meter (DLM)

1770

what is PID control in VFD drives?

1438

Why the field rheostat is adjusted such that the voltmeter reads 380V

1754

In our plant we have installed new MCC with ELR and CBCT which is detecting some leakage current in the system but it leading to some confusion when to check that in which feeder which is drawing current we put off the whole panel itself but still CBCT detecting some leakage current so can anybody ans me , where i am going wrong or how to detect whether its actual leakage or CBCT malfunctioning.

1613

dear all i am kumara now current working in electrical designing of control and relay panel i want learn some substaion design then any book are available. pls mention name and authour

1449

What is the capacitance values of 132,220,400 & 765 kV current transformer

1402