When standing watch at sea, steaming full...

🔍 Key Concepts

• Function of the DC heater (de-aerating condenser or dearator) in a steam plant and what flows into and out of it • How make‑up feed water is introduced into the cycle and its effect on levels and pressures • Meaning of condensate depression and what happens to it when more/less water is added or heat is removed/added

💭 Think About

• Trace the path of make‑up feed water from the source to the DC heater and ask yourself which variable it most directly affects first: pressure, level, or temperature-related quantities • Consider which of the three listed parameters are closely linked to volume/level changes versus heat/temperature changes • Think about steady full‑ahead operation: would a normal amount of make‑up water cause all three changes at once, or is that unlikely in stable plant conditions?

✅ Before You Answer

• Verify how DC heater pressure is normally controlled (by steam source or by water addition?) • Check what primarily determines DC heater level (inflow vs outflow, and which flows are affected by make‑up feed) • Confirm how condensate depression is defined (difference between saturation temperature and actual condensate temperature) and whether adding relatively cooler make‑up water would tend to increase or decrease that difference

When standing watch at sea, steaming full ahead, adding make-up feed water would also have a tendency to change which of the following parameters?

Decrease DC heater pressure.

Increase DC heater level.

Increase condensate depression.

All of the above.

🔍 Key Concepts

💭 Think About

✅ Before You Answer