Evive Software Analytics Interview Questions and Answers

Relief devices such as Conventional, Balance bellow, and Pilot operated are used in process engineering to protect equipment from overpressure.

• Conventional relief devices are simple and rely on a spring-loaded mechanism to relieve pressure.

• Balance bellow relief devices use a bellows to balance the pressure on both sides of the valve, allowing for accurate pressure relief.

• Pilot operated relief devices use a pilot valve to control the opening and closing of the main relief valv...read more

Relief devices are safety devices used to protect equipment and personnel from overpressure situations.

• Types include pressure relief valves, rupture discs, and safety valves

• Pressure relief valves are the most common type and operate by opening to release excess pressure

• Rupture discs are non-reclosing devices that burst at a predetermined pressure to relieve pressure

• Safety valves are similar to pressure relief valves but are typically used for higher pressure applications

Distillation column operation involves separating components based on boiling points, troubleshooting involves identifying and resolving issues.

• Understand the process flow and operating conditions of the distillation column

• Monitor temperature, pressure, and flow rates to ensure proper operation

• Troubleshoot issues such as flooding, foaming, or poor separation efficiency

• Inspect trays, packing, and internals for damage or blockages

• Adjust reflux ratio, reboiler heat input, or fee...read more

Selectivity is the ratio of desired product to undesired products, while conversion is the percentage of reactant converted to products.

• Selectivity measures the efficiency of a reaction in producing the desired product.

• Conversion measures the extent to which reactants are converted to products.

• High selectivity indicates a high proportion of desired product, while high conversion indicates efficient use of reactants.

• For example, in a reaction producing ethanol from ethylene, h...read more

Reactor selectivity is the ability of a reactor to produce a desired product while minimizing the formation of undesired byproducts.

• Reactor selectivity is a key factor in determining the efficiency of a chemical process.

• It is influenced by factors such as reaction conditions, catalysts, and reactant concentrations.

• For example, in a catalytic hydrogenation reaction, high selectivity would mean that the desired product is formed with minimal side reactions.

Selectivity can be controlled by optimizing reaction conditions, catalyst selection, and process design.

• Optimize reaction conditions such as temperature, pressure, and reactant concentrations

• Select appropriate catalysts to favor desired reactions over side reactions

• Design the process to maximize the desired product yield and minimize byproducts

• Use techniques like separation processes to isolate the desired product

Distillation column separates components of a liquid mixture based on differences in boiling points.

• Distillation column uses heat to vaporize liquid mixture

• Vapors rise through column and condense at different heights based on boiling points

• Separated components are collected at different levels of the column

• Bottom of column collects high boiling point components, top collects low boiling point components