| 
    
        | Engineering  :: Heat Transfer |  | 
       
        
	 
	
	 
 |  |  | 
| 
        
     | 
    
  
        | 
            
            
                |  | In heat exchanger design, one transfer unit means |  
                | | [A]. | One fluid exchanging with another fluid of the same chemical composition | [B]. | The section of heat exchanger which will cause temperature drop of one degree centigrade |  | [C]. | The section of heat exchanger where heat transfer surface area is one square metre | [D]. | The equivalent length of tubes in case the heat exchange was for a temperature difference of 1?C |  
				    | [E]. | Condition when the change in temperature of 1?C numerically equals the average driving force. |  |  | 
 |  |   |  
 
 |  |