When checking a line to ensure it is completely drained of condensate, which of the following actions is NOT necessary?

In the context of ensuring that a steam line is completely drained of condensate, covering the line with insulation is not essential as part of the draining process. The primary goal when draining condensate is to remove any trapped water that could lead to water hammer, damage to the system, or inefficiencies.

The actions that are necessary for this process focus on ensuring that the line is effectively isolated and that any accumulated condensate can escape. This includes blocking the line at both ends to create a secure environment for the draining process, opening low point drains gradually to allow condensate to flow out, and checking that each trap is operational and able to function correctly during the draining operation.

Insulation, while important for maintaining thermal efficiency and preventing heat loss during operation, does not impact the immediate process of ensuring that the line is clear of condensate. Therefore, while it contributes to the overall performance of the system, it is not a step required specifically for draining condensate from the line.