how can we save enegry by using VFD for Resiprocating Air compressor which is having more unloading running hours

0 Answers   MRF,

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In dc motor starter there is less voltage required for holding contactor that's may why it is called no volt coil. but in ac starter why holding contactor is called no volt coil.

2 Answers   JSW,

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ouestion for the post of section engineer

1 Answers   BSNL, RRB,

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heat can flow from a body at low temperature to a body at higher temperature only when ........ is supplied from an external source A). Voltage B). Current C). work D). Mass

7 Answers   BMRCL,

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what is maxemo work permit procedure

0 Answers  

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what happend if the protection ct is by mistake put instead of measuring ct & vice versa?

2 Answers  

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Two electronic energy meters are connected to seperate phase wires, but connected to a looped neutral. Are these going to function correctly?

8 Answers   DRDO,

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Explain few advantages of electric traction system?

0 Answers  

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if the synchronizing b/w generator and busbar not complete and we close the out going circuit breaker of generator then what happen ?

4 Answers  

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if any body have question paper of railway (section engineering),then plz send me .i will thank of him/her.

0 Answers  

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what happen "when Dyn11 is parallel operation with Dyn1"?

9 Answers  

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How we can change the direction of rotation of Induction motor? Prove it using graphical

0 Answers  

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