Deccan Fine Chemicals Interview Questions, Process, and Tips

Normal question of syllabus

Q1. This is the The hardest round
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Q2. Distillation types and drying.
Ans. 
Distillation types include simple, fractional, and steam distillation. Drying methods include air-drying, freeze-drying, and spray-drying.
• Simple distillation is used for separating liquids with different boiling points.

• Fractional distillation is used for separating liquids with similar boiling points.

• Steam distillation is used for separating volatile compounds from non-volatile compounds.

• Air-drying involves drying a su...read more
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Q3. Pumps and valves
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Q1. What is pH and which are called acids and bases and chromatography techniques
Ans. 
pH is a measure of acidity or alkalinity in a substance. Acids donate protons, bases accept protons, and chromatography techniques separate mixtures.
• pH is a scale from 0-14 to measure acidity or alkalinity

• Acids donate protons, lowering pH (0-6.9)

• Bases accept protons, raising pH (7.1-14)

• Chromatography techniques like HPLC and GC separate mixtures based on different properties

• Examples of acids: hydrochloric acid (HCl), c...read more
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Q1. Asking about work commitment
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Q1. What is your previous experience and skills
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Q1. Reactor mechanical seals
Ans. 
Single seals and double seals , Dri seals and Bellow seals
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Q2. Breakdown maintenance and preventive maintenance
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Reactors, ANFD, Centrifuge, centrifugal pumps, vacuum pumps , Millers and Avpf (Automatic vartical pressure filter)
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Q3. Centrifuge problems
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Centrifuge problems can range from imbalance to motor issues, affecting sample separation and overall performance.
• Check for proper balance of samples in the rotor

• Inspect the motor for any signs of damage or malfunction

• Ensure the centrifuge is on a level surface to prevent imbalance

• Clean and maintain the centrifuge regularly to prevent buildup of debris

• Consult the manufacturer's manual for troubleshooting tips
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Q1. ANFD problems and maintenance
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ANFD problems and maintenance involve troubleshooting and maintaining equipment used in the Agitated Thin Film Dryer process.
• Regular inspection and cleaning of ANFD equipment to prevent buildup and clogging

• Monitoring temperature and pressure levels to ensure optimal operation

• Replacing worn out parts or components to prevent breakdowns

• Calibrating sensors and instruments for accurate readings

• Training staff on proper oper...read more
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Q2. Centrifugal pumps
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Q1. Total experience
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Q2. Family details and salary details
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Excellent commitment co-operative & believe in team work.
Keeping organization goals a priority.
Competitive, efficient, Hardworking and Goal oriented

Q1. Vapour compressor cycle Latent heat Sensible heat Types of cooling tower Types of chiller
Ans. 
The vapour compressor cycle is a thermodynamic cycle used in refrigeration systems to remove heat from a low-temperature region and transfer it to a high-temperature region.
• The cycle consists of four main components: compressor, condenser, expansion valve, and evaporator.

• During the cycle, the refrigerant undergoes phase changes from vapor to liquid and back to vapor.

• Latent heat refers to the heat absorbed or released d...read more
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Q1. What is Heat Transfer
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Heat transfer is the process of energy moving from a warmer object to a cooler object.
• Heat transfer can occur through conduction, convection, or radiation.

• Conduction is the transfer of heat through direct contact, like a metal spoon getting hot in a pot of soup.

• Convection is the transfer of heat through the movement of fluids, like boiling water in a pot.

• Radiation is the transfer of heat through electromagnetic waves,
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Q2. How distillation column works
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Distillation column separates components of a liquid mixture based on differences in boiling points.
• Works on the principle of vapor-liquid equilibrium

• Liquid mixture is heated to create vapor, which rises through column

• Vapor condenses at different heights based on boiling points, separating components

• Components are collected at different points of the column

• Commonly used in oil refineries to separate crude oil into diff
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Q3. What is differnce between conduction, convection, radiation?
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Conduction is heat transfer through direct contact, convection is heat transfer through fluid movement, and radiation is heat transfer through electromagnetic waves.
• Conduction: Heat transfer through direct contact of particles. Example: Touching a hot pan.

• Convection: Heat transfer through fluid movement. Example: Boiling water in a pot.

• Radiation: Heat transfer through electromagnetic waves. Example: Feeling the warmth
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Q4. What is absorption
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Absorption is the process of taking in or soaking up something.
• Absorption can refer to the process of a substance being taken in by another substance, such as a sponge absorbing water.

• In the context of finance, absorption costing is a method of allocating all costs to the cost of production.

• In the context of pharmacology, absorption refers to the movement of a drug from its site of administration into the bloodstream.
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Q5. About heat exchangers
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