Dear Sir/Madam,im going to attend Hpcl written exams on feb 17th in instrumentation stream..can anyone send me the HPCL model papers and pattern of HPCL ....i ve not yet attended anything in HPCL...so i dont know how it comes...so just i need some model test papers and pattern ..pls help me friends...

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i have a dp tx range is 5000mmwc. in which calibration i use in a open tank.1.5*3.5*2.5 mtr.for level msmnt. what is the calculation.

2 Answers   Bajaj Hindusthan,

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why we us isolation barrier in hazardous area how it works to protect the area and please clarify its current flow.

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hi... i'm about to learn siemens plc i came across following question in my mind ... plr ans 1. hw motor operated by plc 2. hw drive operated by plc explain dis by both ladder logic diagram and hardware config , connection

2 Answers   KCP Cements,

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what is coriolis principle for mass flowmeter?

5 Answers   ABB,

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How INtools is useful for routine Instrument maintenance?

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Level in tank under vacuum (Ex: Condensate Tank of Power Plant)is measured using D. P. type level transmitter. Tank is subjected to vacuum of 755mmHg. Is it possible to fill wet leg ( i.e. leg connected to top of vessel with low point of D. P. xmtr) with water?. Are there chances of water getting sucked under vacuum? if yes, what is the solution?

3 Answers  

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What is live zero and dead zero

2 Answers  

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How to make position transmitter feedback reverse i.e at valve close i want 20ma output and at full open 4ma.for the NELES positioner,model:ND8261/TS1.

3 Answers  

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what is cold loop? difference between hot and cold loop?

0 Answers   Adani Power,

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Meaning of the following a. IOP- Manimum; b. IOP- Maximu,;

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steps for installing orifice plate?

0 Answers   Bhushan Power Steel,

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