Question 1584 Deck General

The correct answer is A) gate valve. Gate valves are the most commonly used type of valve on tankers with manually operated tank valves. This is because gate valves provide a straight-through flow path when fully open, which is ideal for large volume liquid transfer applications like those found on tankers. Gate valves also provide a positive shut-off when closed, which is an important safety feature for controlling the flow of hazardous liquids like petroleum products. The other valve types are less suitable for this application - globe valves have a more restricted flow path, check valves only allow flow in one direction, and butterfly valves are better suited for throttling flow rather than full open/close operation.