How many of the washout plugs may be used as a blow down line?

The correct choice indicates that one of the washout plugs may be used as a blow down line. This is based on the design and operational practices surrounding high-pressure boilers.

In the context of boiler maintenance, washout plugs are used to clean the boiler's interior and ensure that sediment and impurities do not accumulate over time. These plugs allow for water to be drained from the boiler. However, only a specific number of these plugs are designed and permitted to be converted or utilized for blow down operations, which helps maintain proper water quality and chemical balance in the boiler system.

Using one washout plug as a blow down line provides an effective means of management while maintaining the integrity and safety of the boiler. The operational guidelines generally stipulate that not all washout plugs can be utilized for this purpose due to design limitations or safety protocols inherent to the boiler's specifications and regulations.

This distinction helps reinforce proper boiler maintenance practices and highlights the significance of using appropriate components for blow down operations, ensuring efficient and safe boiler function.