question_answer

         Consider the following statements:          

Sub cooling in the condenser of a refrigeration system is advisable when:

1. Expansion valve is at a higher elevation condenser.

2. There is a large pressure drop in the line connecting condenser to the expansion valve.

3.  The refrigeration effect is to he increased.

4. The compressor work is to he reduced

Which of these statements are correct?    

A) 1 and 2            

B) 1, 3 and 4     

C) 2, 3 and 4                     

D) 1, 2 and 3