INTERVIEW QUESTIONS FOR CHEMICAL ENGINEERING
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- What is the Driving force for fluid flow? Answer
******************************************************************************* - Pressure drop equation for horizontal pipe line in laminar flow condition? Answer
******************************************************************************* - Pressure drop equation for Inclined pipe line in laminar flow condition?(Inclination by an angle ) Answer
******************************************************************************* - Draw the inclined manometer diagram? Answer
******************************************************************************* - Write the pressure drop equation for inclined manometer? Answer
******************************************************************************* - Use of inclined manometer? Answer
******************************************************************************* - What are differences between pipe and tube? Answer
******************************************************************************* - Types of pumps? Answer
******************************************************************************* - Draw the centrifugal pump diagram and show the impeller and fluid flow direction? Answer
******************************************************************************* - Definition of NPSH? Answer
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- Why cavitation will occur in Centrifugal Pumps?. why not in displacement pumps? Answer
******************************************************************************* - NPSH calculation for suction lift? Answer
******************************************************************************* - NPSH calculation for suction Head? Answer
******************************************************************************* - Determine whether cavitation will occur in the following condition or not? Water at 70 C ,Datum height 5 m (for suction lift condition), & tank is exposed to atm. Answer
******************************************************************************* - Units of viscosity? Answer
******************************************************************************* - Difference between Kinematic viscosity and dynamic viscosity? Answer
******************************************************************************* - Write the forces acting on particle falling in fluid? Answer
******************************************************************************* - How to write particle Nre? Answer
******************************************************************************* - How to calculate particle diameter? Answer
******************************************************************************* - What is minimum fluidization velocity? Answer
******************************************************************************* - How to calculate minimum fluidization velocity? Answer
******************************************************************************* - What is the Driving force for Mass Transfer? Answer
******************************************************************************* - What is the Difference between partial condenser and total condenser? Answer
******************************************************************************* - If column Delta P decreases what happens to the purity?(In this case it is assumed that bottom pressure is constant) Answer
******************************************************************************* - What is the Driving force for Evaporation? Answer
******************************************************************************* - In which column Delta P is high ?(Packed column or tray column) Answer
******************************************************************************* - When we will choose packed column? Answer
******************************************************************************* - What is minimum reflux ratio? Answer
******************************************************************************* - How to calculate minimum reflux ratio? Answer
******************************************************************************* - Draw the x-y diagram? Answer
******************************************************************************* - Explain Me cab thiele method? Answer
******************************************************************************* - Why reaction will takes place? Answer
******************************************************************************* - C + O2 ---------- CO2 when this reaction is feasible? Answer
******************************************************************************* - What are the differences between MFR and PFR? Answer
******************************************************************************* - Write the performance equations for MFR, PFR and Batch Reactors? Answer
******************************************************************************* - A ---k1--- R---k2---- S for the above reaction draw the selectivity diagram when k1 greater than k2 and k1 less than k2? Answer
******************************************************************************* - How to find out the order of the reaction? Answer
******************************************************************************* - A-------R is a nth order reaction. For above reaction how to select a reactor type? and which reactor will give more conversion for same volume of the reactor? Answer
******************************************************************************* - How to calculate the reactor volume using graphical method for MFR and PFR? Answer
******************************************************************************* - What is the driving force for Heat Transfer? Answer
******************************************************************************* - Classification of heat exchangers? Answer
******************************************************************************* - Draw 1-1 Heat Exchanger? Answer
******************************************************************************* - Draw 1-2 Heat Exchanger? Answer
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44. Which Heat Exchanger is efficient 1-1 or 1-2? and Why? Answer *******************************************************************************
45. In a 1-1 Heat exchanger shell side fluid is steam at 100 C and it is leaving as water at 100C which flow pattern will give more Heat transfer? and why? Answer *******************************************************************************
46. How to calculate U(Overall heat transfer coefficient)? Answer *******************************************************************************
47. Draw the temperature profiles for 1-1 heat exchanger in parallel and counter flow conditions? Answer
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48.Why Don't we use odd number of tube passes in Shell and Tube Heat Exchanger? Answer *******************************************************************************
49.What is the difference between DCS and PLC? Answer *******************************************************************************
50. For the given problem below find the rate of change of 'h' w.r.t 't' using appropriate assumptions? Answer51 .Write force bance on rotameter float and write advantages and disadvantages? Answer
FREQUENTLY ASKED QUESTIONS ON COMPRESSORS:
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Q: Where does the head gets developed in a centrifugal compressors?
Q: What is pressure ratio of a compressor:
Answer
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Q: What sort of bearings are used for high speed compressors?
Answer
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Q: In what services centrifugal compressors are used? Answer
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Q: How reliable are centrifugal compressors?
Answer
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Q: In what services barrel compressors are used?
Answer
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Q: What are side-stream compressors?
Answer
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Q: How the compressors are sealed?
Answer
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Q: What type of seals are used for air compressor?
Answer
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Q: Whether online cleaning is used for compressors?
Answer
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Q: Can centrifugal compressors tolerate high molecular weight fluctuations?
Answer
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Q: What is surging?
Answer
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Q: How is surging harmful?
Answer
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Q: What type of seals are more reliable in hazardous services?
Answer
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Q: What should be the seal configurations in hydrocarbon services?
Answer
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Q: How does on identify seal leakage?
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Q: What are compressor protections?
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Q: Are liquids in the process detrimental to compressors?
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Q: What is turndown?
Answer
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