FSC 325 Final (Correctly Answered)

The glassy state of a frozen product helps to reduce the possibility of solutes crystallizing at their eutectic point correct answers True Drum dryers are often used for a high value protein products due to the quick and gentle heat exposure during the dehydration step correct answers False One of the largest safety concerns when working with controlled atmosphere storage facilities is making sure the atmosphere within the facility has been returned to normal atmospheric conditions prior to personnel entering to take samples or work with the product. correct answers True The compressor in a vapor compression refrigeration system would be considered a positive displacement pump correct answers True Freeze concentration is often used for products like coffee because it retains many of the volatile flavor components that may be lost in processes such as a traditional thermal evaporation correct answers True Freezing fruit rapidly will produce large ice crystals between cells resulting in extensive damage through dehydration of the cells correct answers False The forced air movement in a convection oven increases the rate of baking because it reduces the boundary layer of air that reduces the rate of heat transfer from the heated air to the baking item correct answers True One of the processes involved in the frying of doughnuts is the evaporation of water at the surface causing a violent boiling action, which, in turn, results in crisp texture to the outer layers of the deep-fried food correct answers True HIPEF stands for high intensity pulsed electric field which can destroy bacteria by creating holes in the cell wall (electroporation) correct answers True Controlled atmosphere storage facilities commonly use refrigeration and controlled levels of CO2 and O2 to slow the respiration of apples, allowing them to be stored for up to a year without significant spoilage correct answers True Non-hygroscopic foods require packaging that is impermeable to moisture because they have a tendency to become hydrated when left open to the atompshere correct answers False One could use concentric tube heat exchanger connected to a steam supply as a condenser in a refrigeration system correct answers False The cooling process will be faster in a system where the temperature gradient between the food and the heat exchange media is very large correct answers True