Basic Wastewater Operator Practice Exam

What is an indication of normal operation in a packing gland?

1. A slight leak of water

2. No water leaking out

3. Heavy spray of water

4. Water mixing with the lubricant

The correct answer is: No water leaking out

In the context of a packing gland, the correct indication of normal operation is that there is no water leaking out. Packing glands are used to prevent leakage from rotating shafts in pumps and other mechanical systems, and they require proper adjustment to maintain an effective seal. A slight leak of water might suggest that the packing is either too loose or worn out, which is not an ideal scenario since it can lead to increased operational costs, environmental concerns, and equipment inefficiency. Heavy spray of water indicates that there is a significant failure in the sealing mechanism and could pose serious safety risks as well as operational issues. Water mixing with the lubricant in the packing could lead to lubrication breakdown and increased wear, which is counterproductive since proper lubrication is key to the longevity of the equipment. Thus, the absence of any water leakage signifies that the packing gland is functioning correctly, maintaining the necessary balance between sealing efficiency and heat dissipation while minimizing wear and tear on the packing material.