객관식
In the context of gas stoichiometry, to pull a vacuum means to ____.
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7. Gases
Gas Stoichiometry
객관식
Why should a zeotropic refrigerant not be charged into a refrigeration system in vapor form?
A
Charging in vapor form can cause the components to separate, resulting in an incorrect refrigerant composition.
B
Charging in vapor form increases the risk of system overpressure.
C
Charging in vapor form ensures complete mixing of the refrigerant components.
D
Charging in vapor form leads to rapid freezing of the refrigerant lines.
검증된 단계별 안내1
Understand that a zeotropic refrigerant is a mixture of different refrigerant components with varying boiling points, which causes it to have temperature glide during phase change.
Recognize that charging a zeotropic refrigerant in vapor form can cause the components to separate because the vapor phase composition differs from the liquid phase composition due to differing volatilities.
Know that this separation leads to an incorrect refrigerant composition inside the system, which can reduce system efficiency and cause operational problems.
Charging in liquid form helps maintain the correct mixture ratio because the liquid phase composition remains consistent, preventing component separation.
Therefore, avoid charging zeotropic refrigerants in vapor form to ensure the refrigerant mixture remains homogeneous and the system operates as designed.
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