Hotel Service Unit 11 Q7 Quiz

Correct Answer:
B) Low miscibility with refrigerant

Explanation:
Low miscibility allows the oil to separate from the refrigerant in the oil separator, enabling it to be returned to the compressor rather than circulating with the refrigerant.

Correct Answer:
B) Low pour point to remain fluid at low temperatures

Explanation:
A low pour point ensures that refrigeration oil remains fluid at the low temperatures found in refrigeration systems, allowing it to circulate properly without thickening.

Correct Answer:
B) Adequate lubricating ability

Explanation:
Lubrication reduces wear on moving parts, such as compressors, ensuring the system operates smoothly and extends the life of the components.

Correct Answer:
B) To ensure the oil does not react with refrigerants or system materials, maintaining performance over time

Explanation:
Chemical stability prevents the oil from breaking down or reacting with refrigerants, which is essential to avoid corrosion, sludge, or system inefficiencies.

Correct Answer:
B) It is returned to the compressor through an oil return line

Explanation:
Once the oil is separated, it is routed back to the compressor through an oil return line, ensuring the compressor is properly lubricated without affecting the refrigerant’s performance.

Correct Answer:
A) After the compressor, before the condenser

Explanation:
The oil separator is installed after the compressor, where oil may have mixed with the refrigerant gas. It separates the oil before the refrigerant moves to the condenser, ensuring efficient operation.

Correct Answer:
B) By forcing the refrigerant and oil through a series of baffles that separate the heavier oil particles

Explanation:
The oil separator uses baffles to cause the heavier oil particles to drop out of the refrigerant flow, allowing the oil to be collected and returned to the compressor.

Correct Answer:
B) It prevents the oil from conducting electricity, reducing electrical breakdowns in systems with electrical components

Explanation:
High dielectric strength ensures the oil doesn’t conduct electricity, protecting electrical components within the system from potential short circuits or breakdowns.

Correct Answer:
B) To separate oil from the refrigerant and return it to the compressor

Explanation:
The oil separator removes oil that may have traveled with the refrigerant and ensures it is returned to the compressor. This prevents oil from circulating through the system, which can reduce efficiency.