Eternis Fine Chemicals Project Supervisor Interview Questions and Answers for Experienced

Vacuum in a column can be created by using a vacuum pump to remove air and other gases from the column.

• Use a vacuum pump to remove air and other gases from the column

• Ensure all connections are airtight to maintain the vacuum

• Monitor the vacuum level regularly to ensure it is maintained

• Adjust the vacuum pump settings as needed to achieve the desired vacuum level

Steam ejectors work by using high-pressure steam to create a vacuum for removing gases or vapors from a system.

• Steam is expanded through a nozzle to increase its velocity

• The high-velocity steam entrains the gases or vapors to be removed

• The mixture of steam and gases is then condensed and separated in a diffuser

• The condensed steam is usually discharged to a condenser or a drain

LEL (Lower Explosive Limit) and UEL (Upper Explosive Limit) are the concentration range of a gas in air that can result in an explosion if ignited.

• LEL of hydrogen is 4% in air

• UEL of hydrogen is 75% in air

• Concentrations below LEL are too lean to burn, while concentrations above UEL are too rich to burn

There are various types of reactors used in production processes, such as batch reactors, continuous stirred-tank reactors, and plug flow reactors.

• Batch reactors are used for small-scale production and allow for easy control of reaction conditions.

• Continuous stirred-tank reactors are used for continuous production and have good mixing capabilities.

• Plug flow reactors are used for reactions that require a specific reside...read more

Types of distillation columns include batch, continuous, fractional, and steam distillation.

• Batch distillation: Used for small-scale production and involves separating components based on boiling points.

• Continuous distillation: Used for large-scale production and involves a continuous feed of mixture and product removal.

• Fractional distillation: Used to separate components with closer boiling points by creating multiple...read more

Flash point is the temperature at which a substance gives off enough vapor to ignite momentarily, while fire point is the temperature at which a substance will continue to burn after ignition.

• Flash point is the temperature at which a substance can ignite momentarily when exposed to an ignition source.

• Fire point is the temperature at which a substance will continue to burn after ignition.

• Flash point is typically lower t...read more

Centrifugal pump mechanism involves the conversion of mechanical energy into kinetic energy to increase the fluid's velocity and pressure.

• Centrifugal pump consists of an impeller that rotates to create centrifugal force.

• Fluid enters the pump through the center of the impeller and is flung outwards by centrifugal force.

• The fluid gains kinetic energy and pressure as it moves through the pump.

• The fluid is then discharged ...read more