Question 71Steam Plants - 1st Asst/Chief

70% to pass

A malfunction in the DC heater is indicated by _______________.

Acondensate coming in contact with steam inside the heater
Bair flowing from vent condenser vent
Cthe boiler requiring excessive amounts of oxygen scavenging chemicals
Dwater and steam entering the DC heater at different temperatures
AI Explanation

The correct answer is C) the boiler requiring excessive amounts of oxygen scavenging chemicals. A malfunction in the DC (direct contact) heater would be indicated by the boiler requiring excessive amounts of oxygen scavenging chemicals. This is because a DC heater malfunction can lead to air entering the system, which would increase the amount of oxygen present and require more chemicals to scavenge that oxygen. The other answer choices are incorrect because they do not directly indicate a DC heater malfunction. Condensate contacting steam (A), air flowing from the vent condenser (B), and water and steam entering at different temperatures (D) could be symptoms of other issues, but do not specifically point to a DC heater problem.

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Official Resources
46 CFR Machinery & Electrical 46 CFR Engineering USCG National Maritime Center
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