1. The compressor may be reciprocating to rotary type. |
2. No shaft seal is necessary. |
3. More silent in operation. |
4. COP is more than that of open compressor. |
A) 2 and 4
B) 1, 2 and 3
C) 1, 3 and 4
D) 2, 3 and 4
Correct Answer: B
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