Question 457General Subjects - Assistant Engineer70% to pass
To prevent damage to dry cargoes, the cargo-hold ventilation and dehumidification systems play a key role. In terms of the maintained dew point, what statement is true?
AI Explanation
The correct answer is C) The dew point temperature of the cargo-hold is normally maintained 10oF below the surface temperature of the cargo or ship structure.
This is correct because maintaining the cargo hold dew point temperature 10oF below the surface temperature of the cargo or ship structure helps prevent condensation from forming on the cargo or interior surfaces. Condensation can lead to damage of dry cargoes, so the ventilation and dehumidification systems are designed to keep the dew point low enough to prevent this.
The other options are incorrect because: A) maintaining the dew point 10oF above the surface temperature would allow condensation to form, B) maintaining a constant dew point regardless of surface temperature would not account for changing conditions, and D) maintaining the dew point at the surface temperature would also allow condensation to occur.
Related Questions
#455 What statement is true concerning a liquid desiccant cargo-hold dehumidification system? #456 With regard to the cooling and heating coils and humidification and regeneration chambers of a liquid cargo-hold dehumidification system, which statement is true? #458 To determine the average cargo-hold dew point temperature, at what location would the dew point be measured? #459 What common feature is found on both liquid-desiccant and solid-desiccant cargo- hold dehumidification systems? #460 What type of HVAC system is ideally designed to serve a large public space?