Single-stage vapour compression refrigeration system cannot be used to produce ultralow temperatures because:

Lunbricants for ultra-low temperatures are not available

Refrigerants for ultra-low temperatures are not available

Volumetric efficiency will decrease consider-ably

Heat leakage into the system will be excessive

Single-stage vapour compression refrigeration system cannot be used to

1.	Single-stage vapour compression refrigeration system cannot be used to produce ultralow temperatures because:
A.	Refrigerants for ultra-low temperatures are not available
B.	Lunbricants for ultra-low temperatures are not available
C.	Volumetric efficiency will decrease consider-ably
D.	Heat leakage into the system will be excessive
Answer» B. Lunbricants for ultra-low temperatures are not available

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Single-stage vapour compression refrigeration system cannot be used to produce ultralow temperatures because:

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