Under normal conditions, steam to the DC...

Question 1 / 270705eccef9cbacbc34ba4d457a8

Question 1 of 270705eccef9cbacbc34ba4d457a8

Under normal conditions, steam to the DC heater is supplied directly from which of the systems listed?

Question 1 of 27070

Under normal conditions, steam to the DC heater is supplied directly from which of the systems listed?

🔍 Key Concepts

• Deaerating (DC) heater purpose – why it needs a constant source of low‑pressure steam • Difference between main steam, auxiliary steam pressures, and auxiliary exhaust steam in a typical marine plant • Normal vs. abnormal (startup/emergency) steam supplies to heaters

💭 Think About

• Ask yourself: Is the DC heater normally supplied from a high‑pressure live steam source, or from a lower‑energy source that is available whenever auxiliaries are running? • Which system on the list would most reasonably provide a continuous supply of steam without wasting high‑pressure energy? • In many traditional steam plants, what is done with exhaust steam from auxiliaries like pumps and turbines?

✅ Before You Answer

• Make sure you match the DC heater with a low‑pressure / heat‑recovery source rather than a primary propulsion steam source under normal conditions. • Eliminate options that would be inefficient for continuous heating duty in a large plant. • Think about what happens to turbine exhaust and other auxiliary exhausts in a conventional marine steam cycle.

Question 1 of 27070

Under normal conditions, steam to the DC heater is supplied directly from which of the systems listed?

Main steam

600 psi auxiliary steam

150 psi auxiliary steam

Auxiliary exhaust steam