Which of the following contaminants can waterjetting effectively remove?

Waterjetting is particularly effective in removing surface oil and grease due to its high-pressure water stream, which is capable of penetrating the oily layers and dislodging contaminants from the substrate. The mechanical action of the water allows for effective cleaning by emulsifying and flushing away oils and greases, which are typically hydrophobic and can be stubborn to remove using other methods.

In contrast, while waterjetting can remove abrasive dust particles to some extent by dislodging them from surfaces, it may not be as effective as other cleaning techniques that specifically target dust and particulate contaminants. Heavy metals and airborne debris require different treatment approaches, as heavy metals often adhere strongly to surfaces and may need chemical treatments, whereas airborne debris would generally be handled by cleaning processes that don't involve high-pressure water. Thus, the primary advantage of waterjetting lies in its capability to effectively manage oily residues, making it the most suitable choice among the options provided.