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NTPC Interview Questions

What is the output of 25 kva 11/.4 kv transformer in kw ? Plz generalized it...

5665

Why can not you store AC power in battery like DC power?

3601

How to calculate the copper in HT motors if KW, RPM & Voltage is given

1890

I know during Surge Impedance Loading maximum power is transferred through a transmission line and also Sending end voltage becomes equal to Receiving end voltage i.e Vs=Vr so my question is if both end voltages are equal then how current travels in such line hence how power is transmitted because flow of current needs Potential difference??

2990

if one potential missing in energy meter , how much % slow the energy meter?

3596

Factor of safety for steel should be based on its yield stress or its ultimate stress and factor of safety for concrete should be based on its ultimate stress or its yield stress?

12076

What is the knee point voltage of CT-100/5,15VA,5P20 ?

4475

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

5763

What's the differs between voltage & current & emf.

2260

why the transformer has no starter

6273

what is the significant for using two types of voltage(line voltage & phase voltage)

1854

in a delta-star with neutral grounding on star side what will happen if one star limb  got opened at star point

3205

How to calibrate radar lt type transmitter

5142

if single phase is having 220v supply then why three phase is having 440v instead of 660v?

5205

Why boiler chimney area  oxyden sensor fixing?

1450

As a water tank loses heat, the temperature drops by 2 K/min when a heater is on, the system gains temperature at 4 K/min. A two-position controller has a 0.5 min control lag and a neutral zone of ± 4% of the setpoint about a setpoint of 323 K. Plot the heater temperature versus time. Find the oscillation period

941

when we decide to use soft starter drive or vfd drive in mcc to operate apump?

948

What are the main key components in Web applications and Client Server applications? and their differences?

838

How to test Webservices and how can we write test cases for that

2184

a three phase squirrel cage induction motor runs slow? list all possible reasons for such fault.

863

How can write a C program that shows All the prime number?

888

explain any three organizational elements make up a sales area and their function?

3

what do you mean by Repatriation and its shock

3076

block diagram of 2 ups system connected in hot stand by mode?

6716

Can I continue to run flex builder 2 in parallel with flex builder 3 beta 3?

1

What is 'Key value pair' in HDFS?

213

Explain EAV Concept in magento

1

What are the Data providers in ADO.Net?

13

What is trigger.new? : salesforce crm

1

wap to accept an int array frm the user and print the lucky nos.

1072