Question 22General Subjects - Assistant Engineer

The correct answer is B) intercooler relief valve. The intercooler relief valve is designed to prevent over pressurization of the air compressor intercooler. It is a safety device that will open and release excess pressure if the pressure in the intercooler exceeds a predetermined safe limit. This protects the intercooler and other components of the air compressor system from damage due to excessive pressure. The other answer choices are incorrect because they do not directly address the issue of over pressurization in the intercooler. The first-stage unloader, last-stage unloader, and after cooler relief valve all serve different functions in the air compressor system, but are not specifically designed to prevent over pressurization of the intercooler.