In preparation for receiving chilled reefer cargo, the reefer space has been precooled for over twenty-four hours. Loading may begin when the space has been cooled to a temperature between __________.
• Chilled vs. frozen cargo – what temperature range is typical for chilled products like fruits/vegetables, not deep-frozen meat or ice cream • The purpose of precooling the reefer space – how close should the space temperature be to the intended carrying temperature of the cargo? • Typical refrigerated storage temperatures used in the food industry for fresh produce and dairy (above freezing, but still cold)
• First, decide what approximate temperature range is used for chilled (not frozen) cargo. Should it be below, near, or well above the freezing point of water (32°F / 0°C)? • Look at each option and ask: would cargo loaded at that range be frozen solid, just above freezing, or almost at room temperature? Which category does “chilled” normally fall into? • Consider why you don’t want to freeze a chilled cargo, but you also don’t want it too warm when loading. What kind of narrow band around the freezing point would make sense?
• Eliminate any ranges that are clearly for deep‑frozen cargo (well below 0°F / -18°C). • Eliminate any ranges that are clearly too warm to be considered refrigerated cargo (close to typical room or cool-room temperatures). • Focus on the option that keeps cargo cold but not frozen, i.e., around but not significantly below 32°F (0°C).
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