Thermal process design II knowledge test

What range of temperature is considered appropriate for the refrigeration of foodstuff?

• 0 to 20 °C

• -1 to 8 °C

• 4 to 6 °C

• -18 to 0 °C

What is the component that reduces the pressure of the refrigerant in a refrigeration system?

• Evaporator

• Compressor

• Condenser

• Expansion valve

What expression could be used to determine the cooling time of a food product?

• Fourier number

• Prandtl number

• Biot number

• Newton’s law of cooling

What is food thawing?

• The action of defrosting foods

• When foodstuff is placed into a refrigerator

• When food is gaining heat

• The action of removing heat from a fruit

What is it called when a substance change from solid to gas state?

• Liquefaction

• Sublimation

• Fusion

• Evaporation