Armstrong International Regional Sales Manager Interview Questions and Answers

Filter types include physical, chemical, biological, and mechanical filters.

• Physical filters remove particles by physical barriers, such as screens or membranes.

• Chemical filters use chemical reactions to remove impurities, like activated carbon filters.

• Biological filters use living organisms to break down pollutants, like in wastewater treatment plants.

• Mechanical filters physically trap particles, like in air purifiers

The number of filter classifications varies depending on the industry and application.

• Filter classifications can be based on different criteria such as size, material, efficiency, and purpose.

• In the automotive industry, filters can be classified as air filters, oil filters, fuel filters, etc.

• In the pharmaceutical industry, filters can be classified as membrane filters, depth filters, and sterile filters.

• In the water tr...read more

There are typically four stages in an AHU.

• The first stage is the mixing chamber where outside air is mixed with return air.

• The second stage is the filtration stage where air is filtered to remove impurities.

• The third stage is the heating or cooling stage where the air is heated or cooled to the desired temperature.

• The fourth stage is the distribution stage where the air is distributed to the various parts of the buildi...read more