What is dry ice test?

Question

Generally this test is done on drier which is instrument of compressed air & breathing air system.

Answer 1

Carbon dioxide liquefies/boiles at -57°C and solidifies/melts at -78 °C . People use these carbon dioxide properties, to test other properties. One such test is impact testing of metals, at low temperature.

Solidified/Solid carbon dioxide is called dry-ice. The test using solid carbon dioxide is called dry-ice test.

Answer 2

Carbon dioxide is a chemical compound composed of one carbon and two oxygen atoms. It is often referred to by its formula CO2. It is present in the Earth's atmosphere at a low concentration and acts as a greenhouse gas. In its solid state, it is called dry ice. It is a major component of the carbon cycle.

Atmospheric carbon dioxide derives from multiple natural sources including volcanic outgassing, the combustion of organic matter, and the respiration processes of living aerobic organisms; man-made sources of carbon dioxide come mainly from the burning of various fossil fuels for power generation and transport use. It is also produced by various microorganisms from fermentation and cellular respiration. Plants utilize carbon dioxide during photosynthesis, using both the carbon and the oxygen to construct carbohydrates. In addition, plants also release oxygen to the atmosphere, which is subsequently used for respiration by heterotrophic organisms, forming a cycle.