Basic questions asked in HPCL(instrumentation) in refinery section

1 Answers   HPCL,

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What is the neutral voltage in practical AC systems

0 Answers   VCMS Technologies,

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Question 95 - The following formula is used as a reference : (analyte signal) / (internal standard signal) = (f-factor) x (concentration of analyte) / (concentration of internal standard). A solution containing 3 mM of analyte and 4 mM of internal standard gave peak signals of 2 and 3 mamps respectively. Another similar solution containing 2 mM of analyte and 1 mM of internal standard gave peak signals of 1 and 4 mamps respectively. Find the average f-factor.

1 Answers  

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Methodology for calibration for ctm.... Explain in simple way pls

0 Answers  

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Why we make body earthing of transformer and what will be the size of the copper wire for this purpose related to KVA Capacity of the Transformer as per code.

0 Answers  

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i want to design tap changer for 15kv to 0.4kv steepdown transformer then how can i calculate tap number required

0 Answers  

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how we can calculate the load appeared on programable logic controller.and what is the method to calculate the scan time of PLC.

0 Answers   Siemens,

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i want MEIL placementt papers

0 Answers   MEIL,

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In an existing power plant (phase I) with step up transformers (3nos) with Ynd1 vector group to the 400KV bus bar,an extension power plant (phase II) with transformers (4nos) with Ynd11 vector group >. what are the consequences of such configuration ,please note that % impedance are also differ i.e. 15% & 10.5% the reason was that auxiliary supply interface is at different voltage levels i.e 400v & 6.6KV in phase i and phase II respectively .please advise ! Thank you !

1 Answers  

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what is the work of commutator and brush in motor

0 Answers  

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why we use transformers?

0 Answers  

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difference between gauges and comparator

0 Answers  

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