Answer / s

Based on the presence of flammable material
like hydrogen,acytelene,benzene.

If one or more flammable materials present ,it is hazardous
area.otherwise ,it is non-hazardous area.

Answer / nvr

Hazardous Area Classified based on following specified
criteria.

1) Characteristics of material ( Like Toxic, flammable).
2) presence of Material surrounding the atm.
3) Risk Rating.

On drum level, why we are using air to close Control valve?

4 Answers   L&T,

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i want the equation of this question. Tranmitter range is 120 mmwc and dcs flow range is 1700 nm3/hr. if i want to change dcs range from 1700 to 2400 nm3/hr then how much dp i have to enter in transmitter

2 Answers   GMR,

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What is the meaning of Dry contact and Wet Contact related to to sensors?

5 Answers   Emerson, Google,

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with the help of suitable diagrams different types of control valves

1 Answers  

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What is zone,loop/fire alarm system?

0 Answers   Emco,

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in DCS or PLC we can not put all ai or di,there is calculation through which we can accomodate certain no of digital and analog signal.I need to know that calculation

1 Answers  

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defination of radial vibration?

0 Answers   EE Limited, MNC,

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why thermocouple called thermocouple?

4 Answers  

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In dcs contol valve parameters showing like this Gain=1 or 2 , ti=7 sec, td=20sec. But temp,pressure,level control valves we are using in which type parameter side using ti,td clearly tell me

1 Answers  

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what is the differnt between open loop and close loop ?

5 Answers   India Cements,

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my data card only does run in my mobile so how can change it that it run other mobile & computer and i can stor data in my data card

0 Answers  

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What is the use of each wire in three wire RTD

0 Answers   GSPC,

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