Question 192General Subjects - Assistant Engineer

The correct answer is D) control the speed of the hatch cover movement while closing. A restrictor valve in a hydraulic hatch cover system is used to control the speed of the hatch cover movement, particularly during the closing process. This ensures a smooth and controlled closure of the hatch, preventing damage to the hatch or surrounding structures. The restrictor valve achieves this by restricting the flow of hydraulic fluid to the actuators, allowing for a controlled and gradual closing of the hatch cover. The other options are incorrect because they do not accurately describe the primary purpose of a restrictor valve in a hydraulic hatch cover system. Option A would be the role of a check valve, option B would be the role of a pressure relief valve, and option C would not be the primary purpose of a restrictor valve.