Gujarat Fluorochemicals QC Executive Interview Questions and Answers

Chromatography is a technique used to separate and analyze mixtures of substances based on their different properties.

• Chromatography involves a stationary phase and a mobile phase.

• The stationary phase is a solid or liquid material that retains the components of the mixture to be separated.

• The mobile phase is a liquid or gas that carries the mixture through the stationary phase.

• Different components of the mixture intera...read more

pH is a measure of the acidity or alkalinity of a solution.

• pH stands for 'potential of hydrogen'.

• It is a logarithmic scale ranging from 0 to 14.

• A pH of 7 is considered neutral, below 7 is acidic, and above 7 is alkaline.

• Each unit change in pH represents a tenfold change in acidity or alkalinity.

• pH is commonly used in various fields such as chemistry, biology, and environmental science.

Nitration reaction is a chemical reaction in which a nitro group (-NO2) is introduced into a molecule.

• Nitration is a type of electrophilic aromatic substitution reaction.

• It involves the substitution of a hydrogen atom on an aromatic ring with a nitro group.

• The reaction is typically carried out using a mixture of nitric acid and sulfuric acid as the nitrating agent.

• Nitration reactions are commonly used in the synthesis ...read more

Karl Fischer reaction is a method for determining the water content in a sample. The instrument used for this reaction is calibrated using standard solutions.

• Karl Fischer reaction is a chemical reaction that involves the titration of water with iodine.

• It is commonly used in analytical chemistry to measure the moisture content in various substances.

• The reaction is based on the principle that iodine reacts with water to ...read more

Normality refers to the state of being normal or conforming to a standard or norm.

• Normality is a concept used in various fields to define what is considered typical or expected.

• It is often used to describe the behavior, characteristics, or values that are within the range of what is considered normal.

• Normality can vary depending on the context and can be subjective or objective.

• In statistics, normality refers to the di...read more

The main components of HPLC are the mobile phase, stationary phase, pump, injector, column, detector, and data acquisition system.

• Mobile phase: The solvent or mixture of solvents that carries the sample through the system.

• Stationary phase: The solid or liquid phase that retains the analytes based on their interactions.

• Pump: Responsible for delivering the mobile phase at a constant flow rate.

• Injector: Introduces the sam...read more

I handle multiple types of reactors and have experience in troubleshooting them. I am familiar with various makes of reactors, vessels, and pumps.

• I have experience in handling batch reactors, continuous stirred tank reactors (CSTR), and plug flow reactors (PFR).

• I am skilled in troubleshooting issues related to reactor temperature, pressure, and mixing.

• I have worked with reactors from different manufacturers such as ABC...read more

Mechanical seals are used to prevent leakage between two rotating parts in a machine. There are various types of mechanical seals.

• Types of mechanical seals include pusher, non-pusher, cartridge, and split seals.

• Parameters of mechanical seals include seal face material, seal face design, and secondary sealing elements.

• Seal face materials can be ceramic, carbon, or tungsten carbide.

• Seal face design can be single or doubl...read more

I handle various types of columns and troubleshoot issues related to them.

• I handle columns such as HPLC, GC, ion exchange, and size exclusion.

• I troubleshoot issues related to column clogging, peak broadening, and retention time shifts.

• I also perform regular maintenance and calibration to ensure optimal column performance.

• For example, if I notice a decrease in column efficiency, I may check for leaks, adjust the flow ra...read more

Vacuum systems use various types of equipment, including dry vacuum pumps.

• Vacuum systems require pumps to create and maintain a vacuum.

• Dry vacuum pumps are oil-free and use non-contacting parts to create a vacuum.

• Examples of dry vacuum pump makes include Edwards, Leybold, and Agilent.

• Other types of vacuum pumps include rotary vane, scroll, and turbomolecular pumps.

We work with multiple fabrication, insulation and other parties as per job requirements and manage them through effective communication and coordination.

• We identify the required parties for each job and establish clear communication channels with them.

• We ensure that all parties are aware of their responsibilities and timelines.

• We regularly monitor the progress of each party and address any issues that arise promptly.

• We...read more

The procedure for outside vendor involves identifying the vendor, negotiating terms, creating a contract, and following up on deliverables.

• Identify the vendor and their capabilities

• Negotiate terms and pricing

• Create a contract outlining expectations and deliverables

• Follow up regularly to ensure timely delivery and quality

• Maintain open communication with the vendor throughout the process

• Evaluate vendor performance and ma

A work indication motor is a device that provides visual or auditory signals to indicate the status or progress of work.

• Work indication motors use various mechanisms to generate signals, such as lights, sirens, or buzzers.

• They are often used in industrial settings to alert workers about the completion of a task or the occurrence of an event.

• For example, a work indication motor may be used in a manufacturing plant to si...read more