What component tightens the cylinder in the yoke and creates a gas-tight seal?

• A. Washer
• B. Nipple
• C. Retaining screw
• D. Filter

Answer: (C)

The component that tightens the cylinder in the yoke and creates a gas-tight seal is the retaining screw. This screw plays a critical role in securing the gas cylinder to the yoke of the anesthesia machine, ensuring that the connection is both snug and leak-free. When the retaining screw is adequately tightened, it helps prevent the escape of gas, which is essential for maintaining the integrity of the anesthesia system and ensuring patient safety.

Other components mentioned may function in different capacities, but they do not serve the specific purpose of tightening the cylinder in the yoke. Washers may provide cushioning or help with sealing, but they do not create the mechanical connection or seal on their own. Nipples are typically a part of a connection assembly but do not directly engage in tightening. Filters are used for cleaning the gas supply but are unrelated to the physical securing of the cylinder. Thus, the retaining screw is the correct and vital component for achieving that gas-tight seal in the yoke.