Answer / sandeep challa

High pressure drop
cost of construction is also high

Answer / amol deshpande

In bubble cap distillation coloumn, the cap above the downcomer can be blown out from it's position under the effect of high pressure. High Pressure drop is main problem encountered in valve.

Answer / ajithkumar

in bubble cap distillation problems
1. high pressure drop
2. material cost
3. reflux ratio
4. purity

SSR meanig

1 Answers  

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Where barrel pump use?

0 Answers   Deepak Fertilisers,

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BIOCHEMICAL ENGINEERING INSTRUMENTATION - EXAMPLE 29.1 : In the application of Theory of Spectrometry in spectrophotometer, let n = N x C x V, V = A x t, e = a x N where n = number of molecules, N = Avogadro's number, V = volume of cuvette, A = area of cuvette, t = thickness of cuvette, C = concentration of fluid in the cuvette, e = extinction coefficient, a = effective area of molecule. (a) By using calculus in dI = -I x a x N x C x dt, prove that ln (I / Io) = -a x N x C x t, where dI is the small difference in I and dt is the small difference in t. I = intensity of light. Io = initial intensity of light. (b) Show by calculations that ln (Io / I) = e x C x t based on the answer in the previous question (a). (c) Find the equation of log (Io / I) as a function of e, C and t based on the answer in the previous question (b).

1 Answers  

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PROCESS DESIGN - EXAMPLE 21.2 : The names of the flow streams could be represented by : H1 for first hot stream, H2 for second hot stream, C1 for first cold stream, C2 for second cold stream. Data of supply temperature Ts in degree Celsius : 150 for H1, 170 for H2, 30 for C1, 30 for C2. Data of target temperature Tt in degree Celsius : 50 for H1, 169 for H2, 150 for C1, 40 for C2. Data of heat capacity Cp in kW / degree Celsius : 3 for H1, 360 for H2, 3 for C1, 30 for C2. (a) Find the enthalpy changes, dH for all streams of flow H1, H2, C1 and C2 in the unit of kW. Take note of the formula dH = (Cp) (Tt - Ts). (b) Match the hot streams H1 and H2 with the suitable cold streams C1 and C2 to achieve the maximum energy efficiency.

1 Answers  

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i am appearing in railway section engg. exam of chemical eng. therefore i want previous papers and study material of chemical eng.

0 Answers  

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based on percentage problems

0 Answers   Amara Raja,

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ACCOUNTING AND FINANCIAL ENGINEERING - EXAMPLE 34.1 : (i) In the pricing of engineering bonds, 3 sets of data for Portfolio Value, Probability, Senior Tranche and Junior Tranche are : $2000, 81 %, $1000, $1000; $1000, 18 %, $1000, $0; $0, 1 %, $0, $0. By assuming independent defaults, find the price for : (a) Senior Tranche; (b) Junior Tranche. (ii) Assuming statistical independence of the values in the sample, the standard deviation of the mean (S) is related to the standard deviation of the distribution (s) by : N x S x S = s x s, where N is the number of observations in the sample used to estimate the mean. In a drug development project, let s = 1. Find the value of S if such a similar project is performed 100 times.

1 Answers  

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Explain how can viscosity affect the design of a mixer?

0 Answers  

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What are the some common causes of control valve noise?

0 Answers  

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Explain can large temperature differences in vaporizers cause operational problems?

0 Answers  

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What are the some common problems associated with dilute phase pneumatic conveying?

0 Answers  

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hello everyone do anyone have interview questions for any chemical industry please email me at

0 Answers   ONGC,

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