MacDermid Enthone Industrial Solutions Interview Questions and Answers

pH is a measure of acidity or alkalinity of a solution, ranging from 0 to 14.

• pH stands for 'potential of Hydrogen'

• It is a logarithmic scale, with 7 being neutral, below 7 acidic, and above 7 alkaline

• Examples: Lemon juice has a pH of around 2, pure water is around 7, and baking soda is around 9

Acids have a pH below 7 due to the presence of excess hydrogen ions.

• Acids release hydrogen ions (H+) in water, lowering the pH below 7.

• The pH scale ranges from 0 to 14, with 7 being neutral, below 7 acidic, and above 7 basic.

• Examples of acidic substances include lemon juice (pH 2), vinegar (pH 3), and battery acid (pH 1).

A buffer is a temporary storage area that holds data before it is processed or transferred.

• Types of buffers include input buffer, output buffer, circular buffer, and FIFO buffer.

• Buffers help in managing data flow between different components in a system.

• Examples of buffers include keyboard buffer, printer buffer, and network buffer.

Titration is a technique used to determine the concentration of a substance in a solution by reacting it with a known concentration of another substance.

• Titration involves slowly adding a solution of known concentration (titrant) to a solution of unknown concentration until the reaction reaches its endpoint.

• The endpoint is usually indicated by a color change or other observable change, such as a sudden pH shift.

• Common ...read more

Different types of titration include acid-base titration, redox titration, complexometric titration, and precipitation titration.

• Acid-base titration involves the neutralization of an acid with a base or vice versa.

• Redox titration involves a redox reaction between the analyte and titrant.

• Complexometric titration involves the formation of a complex between the analyte and titrant.

• Precipitation titration involves the form...read more

Plating and coating processes involve applying a layer of material onto a surface for various purposes.

• Electroplating: uses electrical current to deposit a thin layer of metal onto a conductive object (e.g. chrome plating on car parts)

• Anodizing: creates a protective oxide layer on metals through an electrolytic process (e.g. anodized aluminum for increased corrosion resistance)

• Powder coating: electrostatically applies ...read more

Various types of defects in plating include blistering, peeling, pitting, and staining.

• Blistering: formation of bubbles on the plated surface due to trapped gases or impurities

• Peeling: detachment of the plated layer from the substrate

• Pitting: formation of small craters or pits on the plated surface

• Staining: discoloration or uneven coloring of the plated surface

Plating processes are used to coat a surface with a thin layer of metal to improve its properties.

• Electroplating - uses an electric current to deposit metal ions onto a surface

• Electroless plating - uses a chemical reaction to deposit metal onto a surface

• Immersion plating - involves dipping a surface into a solution containing metal ions

• Vacuum plating - uses a vacuum to deposit metal onto a surface

• Selective plating - de...read more

Chrome plating is used to improve the appearance, durability, and corrosion resistance of metal surfaces.

• Chrome plating provides a shiny and reflective surface finish.

• It increases the hardness and wear resistance of the metal.

• Chrome plating also protects against corrosion and oxidation.

• It is commonly used on automotive parts, bathroom fixtures, and tools.

• Chrome plating can also be used for decorative purposes on jewelr...read more