question_answer

Which of the following are the special features of a hermetically sealed compressor of a refrigerator?

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.

Select the correct answer using the codes given below:

A) 2 and 4            

B) 1, 2 and 3

C) 1, 3 and 4                     

D) 2, 3 and 4