NACL Industries DCS Engineer Interview Questions, Process, and Tips

Q1. Electrical engineer HT LT PANEL maintenance
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Q2. HT< maintenance job
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Q3. It is a vcb breaker knowledge< PANEL MAINTENANCE JOB
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Q1. Electrical engineer HT PANEL & LT PANEL MAINTENANCE
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Q2. HT PANEL & LT PANEL maintenance
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Q3. HT LT PANEL MAINTENANCE
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Q1. What is dol starter
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Q2. Type of moter
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Q1. Type of starter
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Q1. What is PID in process
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PID stands for Proportional-Integral-Derivative, a control loop feedback mechanism used in industrial processes to maintain desired setpoints.
• PID is a control algorithm that calculates an error value as the difference between a desired setpoint and a measured process variable.

• The PID controller then adjusts the process control inputs to minimize the error and keep the process variable close to the setpoint.

• The Proporti...read more
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Q2. What is thermowell in tank
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A thermowell in a tank is a protective device used to shield temperature sensors from the harsh environment inside the tank.
• Thermowells are typically made of metal and are inserted into the tank to provide a sealed chamber for the temperature sensor.

• They help protect the sensor from corrosion, pressure, and other damaging factors inside the tank.

• Thermowells also allow for easy removal and replacement of the temperature...read more
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Q1. What is normality
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Normality refers to the state of being normal or conforming to a standard or norm.
• Normality is a concept used in various fields, including statistics, psychology, and engineering.

• In statistics, normality refers to the distribution of data being symmetrical and bell-shaped.

• In psychology, normality refers to behavior that is considered typical or within the range of what is expected.

• In engineering, normality can refer to...read more
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Q2. What is ph value
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pH value is a measure of the acidity or alkalinity of a solution.
• pH value ranges from 0 to 14, with 7 being neutral.

• Values below 7 indicate acidity, while values above 7 indicate alkalinity.

• Each unit change in pH represents a tenfold change in acidity or alkalinity.

• pH is measured using a pH meter or pH paper.

• For example, lemon juice has a pH of around 2, making it highly acidic.

• On the other hand, baking soda has a pH o
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Q1. About Dol starter.
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Q2. About Star delta starter
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Q3. Transformers working principle
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Transformers work on the principle of electromagnetic induction to transfer electrical energy between two or more circuits.
• Transformers have two coils of wire, known as primary and secondary coils, which are wound around a core made of ferromagnetic material.

• When an alternating current flows through the primary coil, it creates a changing magnetic field around the coil.

• This changing magnetic field induces a voltage in ...read more
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Q4. Transformers cooling method
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Transformers are cooled using methods such as oil cooling, air cooling, and water cooling.
• Oil cooling: Transformers are immersed in oil to dissipate heat generated during operation.

• Air cooling: Fans are used to circulate air around the transformer to cool it down.

• Water cooling: Water is circulated around the transformer to absorb heat and cool it.

• Forced oil cooling: Oil is circulated through a heat exchanger to remove
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Q5. Overload protection relays
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Q1. Diatillation column and type
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Q2. Evaporators and all laws
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Q3. Heat exchangers and types
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Heat exchangers are devices used to transfer heat between two or more fluids.
• Heat exchangers are commonly used in various industries such as power plants, chemical plants, and HVAC systems.

• There are several types of heat exchangers including shell and tube, plate, and finned tube heat exchangers.

• Shell and tube heat exchangers consist of a shell with multiple tubes inside, allowing one fluid to flow through the tubes wh...read more
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Q4. Extractor and types of pump and flow
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Extractor is a device used to remove substances from a mixture. Types of pumps include centrifugal, reciprocating, and rotary pumps. Flow refers to the rate at which a fluid moves.
• Extractor is commonly used in industries such as chemical, pharmaceutical, and food processing.

• Centrifugal pumps are commonly used for low viscosity fluids, while reciprocating pumps are used for high pressure applications.

• Flow can be measure...read more
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Q5. Thermal heat capcity boiling point
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