What is the true statement about the pneumatics in the T-54?

The assertion that the pneumatics in the T-54 inflate boots for de-ice purposes is accurate because pneumatic systems in certain military vehicles, including the T-54, play a crucial role in ensuring safe operation under various environmental conditions. Pneumatic boots are often inflated with pressurized air to create a barrier of warm air around surfaces that are prone to ice formation, such as wings or other airfoil structures. This de-icing method is essential for maintaining the vehicle's performance and safety during winter operations.

By contrast, the other options do not accurately reflect the usage of pneumatic systems in the T-54. The reference to landing gear operation does not encompass the full range of pneumatic functions performed in the vehicle, as they are utilized for varying applications beyond just landing gear. Similarly, while soundproofing might be relevant in vehicle design, engine noise reduction is not typically a function of pneumatic systems. Lastly, stating that they are not used for ice management overlooks the importance of such systems in ensuring operational efficiency in icy conditions, which the correct statement correctly highlights.