Railways Technical Ability Metal Forming, Casting and Cutting Question Bank Metal Casting

  • 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 

    Correct Answer: C

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