20+ Bharat Rasayan Interview Questions and Answers

Heat exchangers transfer heat between two fluids without mixing them, while condensers convert vapor into liquid by removing heat.

• Heat exchangers transfer heat between two fluids without mixing them

• Condensers convert vapor into liquid by removing heat

• Thermal sock parameters include temperature, pressure, and flow rates

• Temperature is the measure of the average kinetic energy of particles in a substance

• Pressure is the force exerted on a surface per unit area

• Flow rate is the vol...read more

Distillation is a process of separating components of a liquid mixture based on differences in boiling points.

• Distillation involves heating a liquid mixture to create vapor, then cooling the vapor to condense it back into liquid form.

• The condensed liquid is collected separately, resulting in the separation of components based on their boiling points.

• Types of distillation include simple distillation, fractional distillation, and steam distillation.

• Simple distillation is used f...read more

Reactors are vessels used to contain chemical reactions. Types include batch, continuous, and semi-batch reactors.

• Batch reactors are used for small-scale production and testing.

• Continuous reactors operate continuously with a steady flow of reactants and products.

• Semi-batch reactors combine features of both batch and continuous reactors.

• Examples include CSTR (Continuous Stirred Tank Reactor) and PFR (Plug Flow Reactor).

Heat exchangers transfer heat between two or more fluids while keeping them separate.

• Heat exchangers work on the principle of transferring heat from one fluid to another without mixing them

• Types of heat exchangers include shell and tube, plate, and finned tube

• Examples of heat exchangers include radiators in cars and condensers in air conditioning units

A scrubber is a device used to remove pollutants from exhaust gases in industrial processes.

• Scrubbers can be used to remove particulates, gases, or both from emissions.

• There are different types of scrubbers such as wet scrubbers, dry scrubbers, and gas scrubbers.

• Wet scrubbers use a liquid to wash pollutants out of the gas stream, while dry scrubbers use a dry reagent or slurry.

• Examples of scrubbers include sulfur dioxide scrubbers used in coal-fired power plants and scrubbers...read more

Types of reactors include batch, continuous, and semi-batch. Common pumps include centrifugal, positive displacement, and diaphragm. Heat exchangers include shell and tube, plate, and double pipe.

• Types of reactors: batch, continuous, semi-batch

• Common pumps: centrifugal, positive displacement, diaphragm

• Heat exchangers: shell and tube, plate, double pipe

Flammable liquids are substances that ignite easily and burn rapidly. They are commonly used in industrial processes.

• Gasoline

• Acetone

• Ethanol

Sodium Bicarbonate formula is NaHCO3.

• The formula for Sodium Bicarbonate is NaHCO3.

• It is commonly known as baking soda.

• Used in baking, cleaning, and as an antacid.

• It can be produced by reacting sodium carbonate with carbon dioxide and water.

Glass lined reactors are used for producing various chemicals. Reactor temperature and pressure must be carefully monitored for safety.

• Glass lined reactors are commonly used in chemical production for products like pharmaceuticals, dyes, and pesticides.

• Operations handled include mixing, heating, cooling, and reaction monitoring.

• When reactor temperature and pressure increase, it can lead to a potential explosion or leakage.

• First action should be to immediately reduce temperatu...read more

Reactors vary in type and thickness based on their application, including pressure vessels and chemical reactors.

• 1. **Batch Reactors**: Typically have wall thicknesses ranging from 1/4" to 1/2" depending on pressure and material.

• 2. **Continuous Stirred Tank Reactors (CSTR)**: Wall thickness can be around 1/4" to 3/8", designed for constant operation.

• 3. **Plug Flow Reactors (PFR)**: Thickness varies, often around 1/4" to 1/2", depending on the reaction conditions.

• 4. **High-Pre...read more

Unit operations refer to individual steps in a process, while unit processes involve a series of operations to achieve a specific goal.

• Unit operations are individual steps in a chemical engineering process, such as mixing, filtration, distillation, etc.

• Unit processes involve a series of unit operations to achieve a specific chemical transformation or separation, such as a chemical reaction or purification process.

• Unit operations are like building blocks that can be combined i...read more

Unit operation and unit process are fundamental concepts in production processes. pH is a measure of acidity or alkalinity. Different types of pumps are used for various applications. Condensers and heat exchangers are important in heat transfer processes. Distillation is a separation technique used in various industries.

• Unit operation refers to a single step in a production process, such as mixing or filtration.

• Unit process involves a series of unit operations to achieve a s...read more

I have worked on instruments such as oscilloscopes, multimeters, and signal generators, each with their own unique working principles.

• Oscilloscope: used to display and analyze the waveform of electronic signals

• Multimeter: used to measure voltage, current, and resistance in electrical circuits

• Signal generator: used to generate electronic signals of various frequencies and waveforms

I follow safety precautions such as wearing personal protective equipment, conducting regular safety inspections, and providing proper training to employees.

• Wearing personal protective equipment (PPE) such as gloves, safety goggles, and helmets

• Conducting regular safety inspections to identify and address potential hazards

• Providing proper training to employees on safety protocols and procedures

• Implementing emergency response plans in case of accidents or incidents

Centrifugal pump uses rotational motion to transfer fluid, while reciprocating pump uses back-and-forth motion.

• Centrifugal pump uses a rotating impeller to create a suction force and transfer fluid, while reciprocating pump uses a piston or diaphragm to create pressure and move fluid.

• Centrifugal pump is more suitable for high flow rate applications, while reciprocating pump is better for high pressure applications.

• Centrifugal pump is generally more efficient and requires less...read more

Alignment in a reactor ensures optimal performance and safety, involving various techniques to maintain equipment precision.

• 1. Mechanical Alignment: Ensures that rotating equipment like pumps and turbines are aligned to reduce wear and vibration.

• 2. Thermal Alignment: Accounts for thermal expansion of components during operation, ensuring they remain aligned under varying temperatures.

• 3. Optical Alignment: Uses laser technology to align components with high precision, often us...read more

Troubleshooting instrument issues involves identifying problems, analyzing root causes, and implementing solutions.

• Identify the specific issue with the instrument

• Check for any error messages or warning signs

• Inspect the physical components for any damage or malfunctions

• Consult the instrument manual or technical support for guidance

• Perform diagnostic tests or calibration procedures

• Implement solutions such as replacing parts or adjusting settings

• Test the instrument to ensure the...read more

Heat exchangers transfer heat between fluids; vacuum pumps remove air/gases to create a vacuum.

• Types of heat exchangers include: - Shell and tube: Used in power plants and refineries. - Plate: Common in food processing and HVAC systems. - Air-cooled: Used in refrigeration and air conditioning.

• Types of vacuum pumps include: - Rotary vane: Common in laboratories and industrial applications. - Diaphragm: Used in medical devices and chemical processes. - Scroll: Used in HVAC syst...read more

Reynolds number is a dimensionless quantity used in fluid mechanics to predict flow patterns in different fluid flow situations.

• Reynolds number is calculated as the ratio of inertial forces to viscous forces in a fluid flow system.

• It helps determine whether the flow is laminar (smooth and orderly) or turbulent (chaotic and unpredictable).

• Reynolds number is used in various engineering applications such as designing pipes, aircraft wings, and propellers.

• For example, a low Reyno...read more