Aux 2 Unit 9 Quiz 8

Correct Answer:
B) Liquid state

Explanation:
Zeotropic blends must be charged in the liquid state to ensure the correct proportions of each component are maintained. Charging in vapor form can cause fractionation, altering the blend’s composition.

Correct Answer:
B) It behaves like a single-component refrigerant with no significant temperature glide

Explanation:
An azeotropic refrigerant blend behaves like a pure substance, maintaining a consistent composition and temperature during phase changes without separation of components.

Correct Answer:
A) Liquid state

Explanation:
Like zeotropic blends, near-azeotropes should be charged in the liquid state to ensure that the correct proportion of components is maintained and fractionation is avoided.

Correct Answer:
B) It has a temperature glide during phase changes

Explanation:
A zeotropic refrigerant blend has different boiling points for its components, resulting in a temperature glide during evaporation and condensation as the composition changes.

Correct Answer:
C) It has a very low temperature glide, close to that of an azeotrope

Explanation:
A near-azeotropic blend has a minimal temperature glide, making its behavior similar to that of an azeotropic blend but with slight changes in temperature during phase changes.

Correct Answer:
C) Either vapor or liquid, as it behaves like a single-component refrigerant

Explanation:
Azeotropes do not separate into different components during phase changes, so they can be charged in either liquid or vapor state without composition change.