Insecticides India QA QC Engineer Interview Questions and Answers

PID stands for Proportional-Integral-Derivative, a control loop feedback mechanism used in industrial processes to maintain desired setpoints.

• PID is a control algorithm that calculates an error value as the difference between a desired setpoint and a measured process variable.

• The PID controller then adjusts the process control inputs to minimize the error and keep the process variable close to the setpoint.

• The Proporti...read more

A thermowell in a tank is a protective device used to shield temperature sensors from the harsh environment inside the tank.

• Thermowells are typically made of metal and are inserted into the tank to provide a sealed chamber for the temperature sensor.

• They help protect the sensor from corrosion, pressure, and other damaging factors inside the tank.

• Thermowells also allow for easy removal and replacement of the temperature...read more

To prepare 1N H2SO4, dilute concentrated sulfuric acid with distilled water.

• Start with concentrated sulfuric acid

• Measure the required volume of sulfuric acid

• Add the acid slowly to a container

• Take distilled water in a separate container

• Measure the required volume of water

• Slowly add the water to the container with acid

• Mix the solution thoroughly

• Check the pH using a pH meter or indicator paper

• Adjust the concentration by a

Flow meter accuracy depends on various factors such as type of flow meter, fluid properties, and installation conditions.

• The type of flow meter used affects its accuracy. For example, a differential pressure flow meter may have an accuracy of +/- 0.5% of the flow rate, while a magnetic flow meter may have an accuracy of +/- 0.25%.

• Fluid properties such as viscosity, density, and conductivity can also affect flow meter a...read more

Transformers work on the principle of electromagnetic induction to transfer electrical energy between two or more circuits.

• Transformers have two coils of wire, known as primary and secondary coils, which are wound around a core made of ferromagnetic material.

• When an alternating current flows through the primary coil, it creates a changing magnetic field around the coil.

• This changing magnetic field induces a voltage in ...read more

Transformers are cooled using methods such as oil cooling, air cooling, and water cooling.

• Oil cooling: Transformers are immersed in oil to dissipate heat generated during operation.

• Air cooling: Fans are used to circulate air around the transformer to cool it down.

• Water cooling: Water is circulated around the transformer to absorb heat and cool it.

• Forced oil cooling: Oil is circulated through a heat exchanger to remove