Pfizer Senior Engineer Interview Questions and Answers

Designing a vacuum pump involves selecting the appropriate type, determining the required flow rate and pressure, and sizing the components.

• Choose the type of vacuum pump based on the application (e.g. rotary vane, diaphragm, scroll, etc.)

• Determine the required flow rate and pressure for the system

• Size the components, including the pump, motor, and piping, to meet the flow rate and pressure requirements

• Consider factors...read more

Epoxy flooring is a durable and long-lasting flooring solution made of epoxy resin and hardener.

• The surface is prepared by cleaning and etching

• The epoxy mixture is applied using a roller or squeegee

• A second coat may be applied after the first coat has cured

• The surface is left to cure for 24-72 hours

• Optional: a topcoat may be applied for added durability and shine

A clean room is a controlled environment with low levels of pollutants such as dust, airborne microbes, and chemical vapors.

• Clean rooms are used in industries such as pharmaceuticals, biotechnology, electronics, and aerospace.

• The requirements of a clean room area include controlled air flow, high-efficiency particulate air (HEPA) filters, and strict gowning procedures.

• Clean room classifications are based on the number ...read more

The estimated cost of 100ft x 100ft office with vitrified tiling, false ceiling, and furniture for 20 people.

• The cost of vitrified tiling varies depending on the quality and design chosen.

• False ceiling cost depends on the type of material used and the complexity of the design.

• Office furniture cost varies based on the type and quality of furniture selected.

• The estimated cost can range from $50,000 to $100,000 or more de

A Permit To Work system is a formal process to control high-risk activities in the workplace.

• It ensures that proper precautions are taken before starting any work that could potentially be hazardous.

• It involves obtaining a permit from a designated authority before commencing work.

• The permit outlines the specific tasks, hazards, safety measures, and duration of the work.

• Different types of work permits include hot work p...read more

Materials commonly used for making clean room areas include partition walls, coving, and specialized flooring.

• Partition walls in clean rooms are typically made of materials such as stainless steel, aluminum, or composite panels.

• Coving, which is the curved transition between the wall and floor, is often made of materials like PVC or stainless steel.

• Clean room flooring can be made of materials such as epoxy resin, vinyl,...read more