Refex Industries Store Executive Interview Questions and Answers for Experienced

Q1. Heat Exchanger, Distillation, Utilities.
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Q2. Material Balance distillation column
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Q3. Cooling tower types
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Cooling towers are used to remove heat from a building or industrial process by transferring it to the atmosphere.
• Cooling towers can be classified into two main types: natural draft and mechanical draft.

• Natural draft cooling towers use the stack effect to draw air through the tower, while mechanical draft cooling towers use fans to force air through the tower.

• Examples of cooling tower types include crossflow, counterfl
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Q4. Heat Exchanger Type
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Heat exchangers are devices used to transfer heat between two or more fluids.
• There are several types of heat exchangers, including shell and tube, plate, and finned tube heat exchangers.

• Shell and tube heat exchangers are commonly used in industrial applications, while plate heat exchangers are more compact and efficient.

• Finned tube heat exchangers are often used in HVAC systems to increase heat transfer efficiency.

• The ...read more
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Q5. Line sizing, pump sizing.
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Q1. Types of pump and application
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There are various types of pumps used for different applications, such as centrifugal pumps for water supply and positive displacement pumps for oil and gas industry.
• Centrifugal pumps are commonly used for water supply, irrigation, and HVAC systems.

• Positive displacement pumps are used in the oil and gas industry for transferring viscous fluids.

• Diaphragm pumps are suitable for pumping chemicals and pharmaceuticals.

• Peris...read more
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Q2. Difference between distilation and evaporation
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Distillation is a process of separating components in a liquid mixture based on boiling points, while evaporation is a process of converting a liquid into vapor.
• Distillation involves heating a liquid mixture to separate components based on their boiling points.

• Evaporation involves converting a liquid into vapor by heating or exposing it to air.

• Distillation is used in industries to purify liquids like alcohol, while eva...read more
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Q1. Why change your previous company
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Q1. Technical and safety questions. Plant process Process safety Distillation column
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Q1. About family background Mind set
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About family backgrounds and why are you interested for this company

Q1. All about technical knowledge and problem solving and safety
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Q1. Salary discussion and notice period
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Q1. Property of chemical which are we worked with.
Ans. 
Chemical properties include physical state, color, odor, solubility, melting point, boiling point, and reactivity.
• Physical state: solid, liquid, gas

• Color: colorless, white, yellow, etc.

• Odor: odorless, pungent, sweet, etc.

• Solubility: soluble in water, insoluble in organic solvents, etc.

• Melting point: temperature at which solid turns to liquid

• Boiling point: temperature at which liquid turns to gas

• Reactivity: how it react
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Q2. MSDS of chemical
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MSDS stands for Material Safety Data Sheet, which provides information on the properties of chemicals and how to safely handle them.
• MSDS includes information on chemical composition, physical and chemical properties, health hazards, and safety precautions.

• It also provides information on first aid measures, firefighting measures, and accidental release measures.

• Examples of information found in an MSDS include boiling po...read more
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Q3. Distillation, Reaction which we have handled.
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Q4. 40% of questions is regarding safety.
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Q1. My first technical round was taken telephonic bcoz of covid pandemic.
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Q2. 1.In previous organisation roles & responsibilities. 2.what is your contribution for previous organisation. 3. About Design knowledge
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Q1. Second round completed by face to face interview in Ranjitnagar location.
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Q2. 1.Distillation column design 2.Heat balance, material balance 3.IPDS,EPDS ,PDS 4.BASIC Chemical engineering concepts.
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Q1. Qualifications and past experience
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Q1. Basic engineering questions
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Q1. Personal Background, reason for change
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