Answer / amit

COMPressor compress the air means volume reduces.now,PV=RT
(CONST.)P& V are inv.proportional.so air
press.increases.This pressurised air is used in different
ativities.

Answer / anurag

The compressor compresses the air in an airconditioner, so that the temperature reduces as per the principle temperature is inversely proportional to pressure.

in gen traf what is ONAN , ONAF , OFAF and DYN

3 Answers  

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why in scott connection of transformers, main transformer is tapped at 50% and teaser transformer at 86.6%?

5 Answers   Bhel, Bosch, College School Exams Tests, Wipro,

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Whats the use of earth pits? and it will function? whats the natural earth value? How to improve ur earth resistance?

3 Answers   Anwar Ispat,

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why rotor resistance starter is not suitable for squrielcage induction motor?why it is suitable for slipring induction motor?

5 Answers  

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how CBCT works?

1 Answers  

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what is dc voltage?

2 Answers  

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what the purpose of data retrivala panel in substation

1 Answers   NCC,

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When charging a 20 MVA , 33kV/6.6kV transformer through regulated (0-6.6 kV or 0-33 kV) source on no load , what will be the maximum current drawn by transformer from source and what sould be the source capacity.

5 Answers   TATA,

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I have two power supply.a)govt. power b)Captive power.3 phase load connected inside factory.when source change govt. source to captive some motor rotate reverse. Is phase sequence changes when if off & on?If I off generator & on it again is it possible to get changed phase sequence??

4 Answers   ABB,

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Is there any problem ,if R-Y-B voltage is constant , but the air compressor taking one phase high current.what is possible causes.the said compressor is very new.(55kw).

4 Answers  

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1. what is the power factor of a purely inductive load? (i) Zero (ii) Lagging (iii)Leading (iv) Unity 2. which type of transformer connection is preferred in case of power supply transformer? (i) Star/Star (ii) Delta/Delta (iii) Star/Delta (iv) Zig Zag/Star

2 Answers  

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what is the main difference b/w contactor and relay

2 Answers   Pace Pharmaceuticals,

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