Iol Chemicals & Pharmaceuticals Mechanical Engineer Interview Questions, Process, and Tips

Vacuum pumps are devices that remove gas molecules from a sealed volume to create a partial vacuum.

• Positive displacement pumps (rotary vane, piston, diaphragm)

• Momentum transfer pumps (turbomolecular, molecular drag)

• Entrapment pumps (cryogenic, ion, getter)

Mechanical seals are of two types - balanced and unbalanced. The difference lies in the design and application.

• Balanced mechanical seals have a secondary seal that balances the pressure on both sides of the seal faces, reducing the risk of leakage and wear.

• Unbalanced mechanical seals do not have a secondary seal and rely on the pressure difference between the seal faces to maintain the seal.

• Balanced seals are used in h...read more

Kalrez o-rings can withstand temperatures up to 327°C while PTFE o-rings can handle temperatures up to 260°C.

• Kalrez o-rings have a higher temperature range than PTFE o-rings

• Kalrez o-rings can handle temperatures up to 327°C

• PTFE o-rings can handle temperatures up to 260°C

Installation of glass lined and hydrogenation reactors requires careful planning and execution.

• Ensure proper site preparation and foundation design

• Follow manufacturer's instructions for assembly and installation

• Use appropriate lifting equipment and safety measures

• Ensure proper sealing and insulation

• Test for leaks and pressure before use

Checkpoints during installation of reactor mechanical seal

• Alignment of seal faces

• Proper installation of seal support system

• Correct torque applied to bolts

• Verification of seal flush system

• Inspection of seal faces for damage or defects

• Testing of seal for leakage

• Documentation of installation process

Agitators are devices used to mix or stir liquids. There are various types of agitators used in different industries.

• Types of agitators include paddle, turbine, anchor, propeller, and magnetic agitators

• Paddle agitators are used for low viscosity fluids, while turbine agitators are used for high viscosity fluids

• Anchor agitators are used for viscous materials that tend to stick to the walls of the container

• Propeller agit...read more

Various types of oils are used in pumps depending on the application and operating conditions.

• Mineral oil is commonly used for general purpose applications.

• Synthetic oil is used for high temperature and high pressure applications.

• Food grade oil is used in pumps that handle food products.

• Fire-resistant oil is used in pumps that operate in high-risk areas.

• Biodegradable oil is used in pumps that operate in environmentally...read more