Evaporator feed control pt1

What is the definition of superheat?

• The number of degrees a vapor is above its boiling point at a specific pressure.

• The number of degrees a vapor is below its boiling point at a specific pressure.

• The condition where liquid refrigerant is warmer than the minimum temperature required to keep it from boiling.

• The condition where liquid refrigerant is colder than the minimum temperature required to keep it from boiling.

What is the definition of subcooling?

• The condition where liquid refrigerant is warmer than the minimum temperature required to keep it from boiling.

• The number of degrees a vapor is below its boiling point at a specific pressure.

• The condition where liquid refrigerant is colder than the minimum temperature required to keep it from boiling.

• The number of degrees a vapor is above its boiling point at a specific pressure.

What is the saturation temperature of the refrigerant?

• The temperature at which the refrigerant changes from a solid state to liquid.

• The temperature at which the refrigerant changes from a liquid state to solid.

• The temperature at which the refrigerant changes from a vapor state to liquid.

• The temperature at which the refrigerant changes from a liquid state to vapor.

What is the range of box temperatures for high temperature refrigeration?

• 47°F to 60°F

• 28°F to 40°F

• 60°F to 70°F

• -20°F to 0°F

What is the purpose of an evaporator feed control?

• To increase the pressure of liquid refrigerant.

• To heat the evaporator.

• To reduce the pressure of liquid refrigerant.

• To cool the condenser.

Which of the following is not a type of evaporator feed control?

• Hand

• Automatic

• Thermostatic

• Expansion

What is the function of an evaporator feed control as the refrigerant pressure reduces?

• The refrigerant absorbs heat from the evaporator.

• The evaporator absorbs heat from the refrigerant.

• The refrigerant cools the condenser.

• The evaporator cools the compressor.

What is the refrigeration effect?

• The process of moving heat from a place where that heat is wanted to a place where that heat is also wanted.

• The process of moving heat from a place where that heat is not wanted to a place where that heat is wanted.

• The process of moving heat from a place where that heat is wanted to a place where that heat is not wanted.

• The process of moving heat from a place where that heat is not wanted to a place where that heat is also not wanted.

Which of the following is a method of producing the refrigeration effect?

• Solidification

• Chemical reaction

• Boiling

• Condensation

What is evaporation?

• The vaporizing process in which one or more liquids become a vapor or gas.

• The result of blending chemicals that change their molecular structure when mixed together.

• The expansion of a liquid.

• The expansion of a gas.