What is NODE in DCS?

2 Answers  

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Im working in a shopping center, it is also hotel and office building, two towers exactly and someone is proposing a PLC control for the HVAC system, but Im thinking of a DDC control system. in this case what is the difference between PLC and DDC control?

1 Answers  

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how to calculate interface capelary level transmetar lower S.G.0.54 and uper S.G. 0.26 and h=490 mm

3 Answers  

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Hi Friends i need Electronics&Instrumentation Engg question papers for BARC written test by coming 20th May 2008 pls post ur use full info to kkumarei@gmail.com. Or for suggestions pls give one missed call to 9962122264

0 Answers   BARC, Wipro,

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1.what is beta in control valves? 2.what is the condition followed by light in LASERs? 3.1kg/cm2=?psi 4.Integral action reduces what? 5.about vena contracta 6.a simple RC circuit 7.thermistor material's temp coefficient of resistance 8.if wave passes through the thicker area of a chord to a thinner area what changes will occur to wavelength? 9.if 4-20 mA represents 0-10 kg/cm2 what will be the current when pressure is 5 kg/cm2.................

0 Answers   Lurgi,

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Working principle of vibration sensor?, Type of vibration sensor? , Can we use vertical instead of horizental or vice versa?, if not Reasons?

2 Answers  

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what is the different between deflection type measurement and null type measurement in RTD?

0 Answers   SHR Solutions,

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What is the minmum distance between the electrical panel and Instrument panel

1 Answers   Dodsal,

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What is the cascade control system and where is use in power plant give the detail with block diagram

1 Answers  

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how to relay switch sense the fault?

0 Answers   ME,

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how to calibrate temprature switch and flow switch ?

1 Answers   Adgas,

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how to calculate control valve bonnet size?? or how to select its material?

0 Answers   Jacobs,

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