In what manner should the boiler be examined when oil contamination is suspected?

When oil contamination is suspected in a boiler, the examination should be conducted in a wet manner. This is because water is used to thoroughly clean the surfaces of the boiler and help identify the extent of contamination. By using water, it becomes easier to flush out any oil residues that might have accumulated, allowing for a more effective inspection and ensuring that the system is operating safely. A wet examination helps in assessing leaks and penetration of oil into areas that may not be visually observable when dry. This method is crucial, as it promotes a more accurate analysis of the boiler's condition and reduces the risk of overlooking contaminants that could affect the operation and safety of the boiler.