Answer / sagar shinde

1.oxidation and intermittency of operation
2.Formation of hot spots
3.Embrittlement due to grain growth
4.Contamination and corrosion

Answer / n.k.singh.

1.If there is loose connection between terminations of heating elements,hot spot will be made which leads to failure of heater.
2. If reaction takes place between heating element and surrounding atmosphere,i.e. corrosion of heating element which leads to poor heat transfer from heater to load and temperature of element becomes more than the maximum element temperature and heater fails.

Answer / deepak thakur

1)if give connect more voltege than ratede voltege
2)if it heat not convert in proper place.
3)if controlling divice short ckt.
4)if its tharmocuple not fixed in proper place.

Answer / deepak thakur

1)if give connect more voltege than ratede voltege
2)if it heat not convert in proper place.
3)if controlling divice short ckt.
4)if its tharmocuple not fixed in proper place.

Why the substation measure in KV but not in the power ratings of transformer.

4 Answers  

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what will be the motor terminal box connection arrangement (star or delta). on what basis it decided?

3 Answers  

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what is multiplying factor of a energy meter connected with a CT ratio of 600/5 and voltage at 415 volts.

1 Answers  

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AVR

2 Answers  

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Lux meter is the measuring device to measure the lux level of lighting fixture. in industrial sector two types of lighting fixture is being used as street lighting purpose 1. HPSV (Sodium) and 2. HPMV (Mercury). HPMV having white light which is an combination of red, blue and yellow colour, while HPSV haivng Yellow lighting. in HPSV red & blue colour will be absent. during measurement of the lux level of HPSV and HPMV fixture. 1. Lux meter can measure the actual lux level of both fixture? 2. or it will show false reading for HPSV fixture light as it has only yellow light present. please give me answer

1 Answers  

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wat is syncronization . wat parameter will take for syncronization.

2 Answers   IIT,

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Define noise?

0 Answers  

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For a three phase induction motor, what will be the effect on motor if the neutral of the system is shifted to say 20 deg.?

0 Answers  

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what is load balancing. what maximum load diffence is allowed between phases.

1 Answers  

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What are approaches to tackle sedimentation problem of reservoir?

0 Answers  

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what is rotating transformer? what is the uses of it?i mean applicaitons?

5 Answers   First Lead,

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There is one 40MVA oil cooled transformer (yet to commission), filled with 95% oil and we are trying to fill 5% Nytrogen in that transformer so that there should not be any foreign component inside. But even though there is no leakage, nytrogen is not withstanding inside transformer, within a day or two pressure guage is showing 0. Why is it soooo? Pls reply.

1 Answers  

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