Rallis India Interview Questions, Process, and Tips

Normality refers to the state of being normal or typical.

• Normality is a statistical concept used to describe the distribution of data.

• It is often represented by a bell-shaped curve, with the majority of data falling within one standard deviation of the mean.

• Normality is important in quality control and process improvement, as deviations from normality can indicate problems in a system.

• In chemistry, normality refers to ...read more

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

• pH stands for 'potential of hydrogen'

• It is measured on a scale of 0-14

• A pH of 7 is neutral, below 7 is acidic, and above 7 is basic

• pH is important in many industries, including agriculture, medicine, and manufacturing

To prepare molar NaOH solution, dissolve the required amount of NaOH in distilled water and adjust the volume to the desired concentration.

• Calculate the required amount of NaOH using the formula: mass = molarity x volume x molecular weight

• Weigh the calculated amount of NaOH using a balance

• Dissolve the NaOH in distilled water in a volumetric flask

• Add distilled water to the flask to reach the desired volume

• Mix the soluti

Reflux ratio is the ratio of the liquid reflux to the distillate produced in a distillation column.

• It is an important parameter in distillation processes.

• It determines the efficiency of the distillation column.

• A higher reflux ratio results in a higher purity of the distillate.

• Reflux ratio can be adjusted by changing the amount of reflux liquid or the distillate flow rate.

• It is calculated as the ratio of the reflux liqu

Star/Delta starter is used to reduce the starting current of a motor.

• Star connection provides high starting torque but high starting current

• Delta connection provides low starting torque but low starting current

• Star/Delta starter uses both connections to reduce starting current and provide sufficient starting torque

• Used for large motors to prevent damage to motor and electrical system

CV calculation of control valve involves determining the valve's flow coefficient.

• CV is calculated using the formula: CV = Q / (SG * sqrt(dP))

• Q is the flow rate, SG is the specific gravity of the fluid, and dP is the pressure drop across the valve.

• CV is used to select the appropriate valve size for a given application.

• Factors such as valve type, trim size, and pressure drop affect the CV value.

• CV calculation is importa...read more