Camlin Fine Sciences Executive Engineer Mechanical Interview Questions and Answers

Q1. DCS related question and technical
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Q2. DCS and technical related
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Q3. Plant related, Dcs related
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Effluent management & chemicals question

Q1. Document and family background
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Q1. Salary discussions
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Q1. Heat exchanger distillation pump
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Q2. Types of reactors
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Types of reactors include batch reactors, continuous stirred tank reactors, plug flow reactors, and fluidized bed reactors.
• Batch reactors operate in a closed system with a fixed amount of reactants.

• Continuous stirred tank reactors have continuous flow of reactants and products.

• Plug flow reactors have a continuous flow with no mixing of reactants along the length of the reactor.

• Fluidized bed reactors use a fluid to susp...read more
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Q3. What is Distributed control system
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A Distributed Control System (DCS) is a computerized control system used to control and monitor industrial processes.
• Consists of multiple control elements distributed throughout a system

• Allows for centralized control and monitoring of processes

• Used in industries such as oil and gas, power generation, and manufacturing

• Examples include Honeywell Experion PKS, Emerson DeltaV, and Siemens PCS 7
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Q4. Types of control valves
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Control valves are used to regulate the flow of fluids in a process system by varying the size of the flow passage.
• Globe valves: used for throttling and control of flow

• Butterfly valves: used for on/off control of flow

• Ball valves: used for quick shut-off

• Diaphragm valves: used for precise control of flow
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Q5. Types of Alarms
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Types of alarms in a DCS system include process alarms, equipment alarms, safety alarms, and communication alarms.
• Process alarms indicate issues with the process being controlled by the DCS system

• Equipment alarms alert to malfunctions or failures of equipment connected to the DCS system

• Safety alarms warn of potentially dangerous situations that require immediate attention

• Communication alarms signal problems with the co
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Q1. What is DCS ???
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DCS stands for Distributed Control System, a computerized control system used to control and monitor industrial processes.
• DCS is used in industries such as oil refining, power generation, and manufacturing.

• It allows for centralized control of multiple control loops and process units.

• DCS typically consists of controllers distributed throughout the plant, connected by a communication network.

• Examples of DCS vendors inclu
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Q2. How DCS work ??
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DCS (Distributed Control System) is a system used to control and monitor industrial processes.
• DCS uses multiple controllers distributed throughout a plant to control various processes

• It allows for centralized monitoring and control of the entire system

• DCS systems often use graphical interfaces for operators to interact with the system

• DCS can be used in industries such as oil and gas, power generation, and manufacturing
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Q3. What is TLV of chlorine
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TLV of chlorine is the maximum concentration of chlorine that a worker can be exposed to without experiencing adverse health effects.
• TLV stands for Threshold Limit Value

• TLV for chlorine is 1 ppm (parts per million)

• TLV is set by the American Conference of Governmental Industrial Hygienists (ACGIH)

• Exposure to chlorine above TLV can cause respiratory irritation, coughing, and chest tightness
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Q4. What is distillation ?? Tell about reflux also
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Distillation is a process used to separate components of a liquid mixture based on their boiling points. Reflux is the return of condensed vapors back into the distillation system.
• Distillation involves heating a liquid mixture to create vapor, then cooling the vapor to collect the separated components.

• The components with lower boiling points vaporize first and are collected, while the components with higher boiling poi...read more
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Q1. About Dcs and close loops , open loops , cascade loops
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Q2. What is cascade loops
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Cascade loops are a series of control loops where the output of one loop is used as the setpoint for the next loop.
• Cascade loops improve control performance by reducing the effect of disturbances.

• They are commonly used in industrial processes where multiple variables need to be controlled.

• An example is a cascade control system in a chemical plant where the flow rate of a reactant is controlled based on the level in a t
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Q1. Why did you want to leave current company
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Q1. What is distillation column
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A distillation column is a piece of equipment used in chemical processes to separate mixtures into their individual components.
• Distillation columns use the principle of vapor-liquid equilibrium to separate components based on their boiling points.

• They consist of a vertical column with multiple trays or packing material to facilitate the separation process.

• The feed mixture is introduced at the bottom of the column, and ...read more
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Q2. What is open Loop
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Open Loop is a control system where the output is not fed back to the input for correction or adjustment.
• Open Loop control does not use feedback to make adjustments

• It relies solely on the input and predefined control actions

• Examples include automatic doors, traffic lights, and irrigation systems
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Q3. What is Reaction
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Reaction is the response or behavior triggered by a stimulus or event.
• Reaction is a response to a stimulus or event.

• It can be physical, emotional, or cognitive.

• Reactions can vary in intensity and duration.

• Examples include flinching when touched by something hot, feeling happy after receiving good news, or thinking critically when faced with a problem.
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Q1. Open Loop and close loop
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Q2. Types of heat exchanger
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Heat exchangers are devices used to transfer heat between two or more fluids.
• Shell and tube heat exchanger

• Plate heat exchanger

• Double pipe heat exchanger

• Finned tube heat exchanger

• Regenerative heat exchanger
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