The moisture equilibrium chart can be used...

The moisture equilibrium chart can be used to determine which item?

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🔍 Key Concepts

• Hygroscopic cargo and what "moisture equilibrium" means between cargo and surrounding air • What variables are shown on a moisture equilibrium chart (for example: temperature, relative humidity, dew point, moisture content) • Difference between absolute moisture content of air and dew point temperature

💭 Think About

• Think about what you actually read or look up on a moisture equilibrium chart: are you reading a temperature, a moisture content, or something else that is derived from those? • Ask yourself: when preventing cargo sweat and damage, what key air property do we care about when air and cargo are in moisture equilibrium? • Consider which of the answer choices sounds like a direct chart reading versus something that would require more complex psychrometric calculations (like enthalpy).

✅ Before You Answer

• Check which quantities are plotted on the axes and which are given as curves or lines in a typical moisture equilibrium chart for hygroscopic cargoes. • Verify the definition of absolute moisture content versus dew point temperature and which one is typically used operationally on board to judge condensation risk. • Eliminate any answer choices that refer to properties (like enthalpy) that are normally found on a full psychrometric chart, not a simplified moisture equilibrium chart.

🔍 Key Concepts

💭 Think About

✅ Before You Answer