Answer / Anju Upadhyay

Instrument air is continually supplied in a process plant through compressors that draw ambient air and increase its pressure to meet the requirements of various instruments. A dryer may also be used to remove moisture from the air.

Three solid objects of the same material and of equal mass – a sphere, a cylinder (length = diameter) and a cube – are at 5000C initially. These are dropped in a quenching bath containing a large volume of cooling oil each attaining the bath temperature eventually. The time required for 90% change of temperature is smallest for a) cube b) cylinder c) sphere d) equal for all the three whyyyyyyy???????

3 Answers   GATE,

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Jspl question paper for freshers requirements chemical engineering diploma

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what is meaning of pid how it is useing controlers

4 Answers  

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What is a 'saltation velocity' and how is it used in designing pneumatic conveying systems?

1 Answers  

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What is meant by surging in compressors?

5 Answers   CPCL,

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what is the hearth and arch pressure in furnace?

1 Answers   IFFCO,

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Is there a handy way to determine if a horizontal pipe is running full if the flow rate is known?

1 Answers  

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Hi, I am Gurunathan. I am in need of ONGC, IOCL, DRDO technical test ( chemical engineering)and general aptitude questions. If anyone has kindly post it to me soon.

1 Answers   Nelco,

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design calculations for reactor

1 Answers  

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In a furnace, 2 chemical reactions are happening – 1 mole of solid carbon reacts with 1 mole of oxygen gas to generate 1 mole of carbon dioxide gas; 1 mole of solid carbon reacts with 0.5 mole of oxygen gas to generate 1 mole of carbon monoxide gas. In a given process, 100 kmol of carbon is burned in a furnace. (a) Calculate the theoretical oxygen gas needed by assuming that all the carbon is burned completely to carbon dioxide gas. (b) Calculate the theoretical air needed by assuming that all the carbon is burned completely to carbon dioxide gas and there is only 21 % of oxygen gas. (c) Determine the amount of air required (in kmol) if 50 % excess oxygen gas must be satisfied for (a) and (b). (d) It has latter been found that 20 % of the carbon undergoes incomplete combustion resulting to carbon monoxide gas production. The rest of the carbon undergoes complete combustion. Calculate the total oxygen gas required stoichiometrically based on the actual process.

1 Answers  

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What's -74C, dew point is better the -70C dew point In draying unit .

1 Answers  

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i am giving BARC Trainee exam in chemical. Can anyone tell the syllabus and question paper pattern for OCES for BARC trainee?

1 Answers  

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