Engineering  :: Petroleum Refining Engineering  
            
            
         
     
    
	 
    
 
    
 
    
 
 
    
	
	
        
  
    
    
    
        
            
			
			
            
            
                121.  
The conductivity of a crude oil-water mixture depends on the   
 
 
                
			 
				
					
				A. temperature 
				 				 B. percentage of water 
				  
				 
				 				 C. pH 
				 				 D. all of the above 
				 				  
				 
				 				 
				 
                        
                        
                            Answer: D 
 
                            Explanation: 
 
                              
 
                         
                     
                    
                    
                    
                    
                    
                    
                 
             
            
            
                122.  
The conductivity of a crude oil-water mixture    
 
 
                
			 
				
					
				A. remains unaffected with change in temperature 
				 				 B. increases with increase in temperature 
				  
				 
				 				 C. decreases with increase in temperature 
				 				 D. may decrease or increase with increase in temperature depending on the nature of crude oil 
				 				  
				 
				 				 
				 
                        
                        
                            Answer: B 
 
                            Explanation: 
 
                              
 
                         
                     
                    
                    
                    
                    
                    
                    
                 
             
            
            
                123.  
The conductivity of a mixture of crude oil-water mixture  
 
 
                
			 
				
					
				A. is independent of the amount of water present 
				 				 B. decreases with increase in the amount of water 
				  
				 
				 				 C. increases with increase in the amount of water 
				 				 D. decreases linearly with increase in the amount of water 
				 				  
				 
				 				 
				 
                        
                        
                            Answer: C 
 
                            Explanation: 
 
                              
 
                         
                     
                    
                    
                    
                    
                    
                    
                 
             
            
            
                124.  
The feedstock for the catalytic reforming unit is  
 
 
                
			 
				
					
				A. naphtha 
				 				 B. high speed diesel oil 
				  
				 
				 				 C. kerosine 
				 				 D. reduced crude oil 
				 				  
				 
				 				 
				 
                        
                        
                            Answer: A 
 
                            Explanation: 
 
                              
 
                         
                     
                    
                    
                    
                    
                    
                    
                 
             
            
            
                125.  
The operation of reactors used in the catalytic reforming of naphtha is favoured at  
 
 
                
			 
				
					
				A. low pressure and low temperature  
				 				 B. high pressure and high temperature 
				  
				 
				 				 C. low pressure and high temperature 
				 				 D. high pressure and low temperature 
				 				  
				 
				 				 
				 
                        
                        
                            Answer: C 
 
                            Explanation: 
 
                              
 
                         
                     
                    
                    
                    
                    
                    
                    
                 
             
            
            
                126.  
The monometallic catalyst used in the catalytic reforming of naphthas is   
 
 
                
                        
                        
                            Answer: A 
 
                            Explanation: 
 
                              
 
                         
                     
                    
                    
                    
                    
                    
                    
                 
             
            
            
                127.  
The bi-metallic catalysts used in the catalytic reforming of naphthas permit aromatics crerating reactions to occur with a minimum of hydrocracking of paraffins and naphthenes. The bi-metallic catalysts contain  
 
 
                
			 
				
					
				A. platinum and nickel 
				 				 B. nickel and vanadium 
				  
				 
				 				 C. platinum and rhenium 
				 				 D. rhenium and rhodium 
				 				  
				 
				 				 
				 
                        
                        
                            Answer: C 
 
                            Explanation: 
 
                              
 
                         
                     
                    
                    
                    
                    
                    
                    
                 
             
            
            
                128.  
In the catalytic reforming of naphtha the dehydrogenation of naphthenes gives hydrogen and  
 
 
                
			 
				
					
				A. paraffins 
				 				 B. aromatics 
				  
				 
				 				 C. branched chain paraffins 
				 				 D. none of the above 
				 				  
				 
				 				 
				 
                        
                        
                            Answer: B 
 
                            Explanation: 
 
                              
 
                         
                     
                    
                    
                    
                    
                    
                    
                 
             
            
            
                129.  
The desirable reactions in the catalytic reforming of naphtha are  
 
 
                
			 
				
					
				A. slightly exothermic 
				 				 B. endothermic 
				  
				 
				 				 C. autocatalytic 
				 				 D. highly exothermic 
				 				  
				 
				 				 
				 
                        
                        
                            Answer: B 
 
                            Explanation: 
 
                              
 
                         
                     
                    
                    
                    
                    
                    
                    
                 
             
            
            
                130.  
Which of the following reactions is undesirable in the catalytic reforming of naphthas?  
 
 
                
			 
				
					
				A. Hydrocracking of paraffins 
				 				 B. Dehydrogenation of naphthenes 
				  
				 
				 				 C. Isomerization of naphthenes 
				 				 D. Cyclization of paraffins 
				 				  
				 
				 				 
				 
                        
                        
                            Answer: A 
 
                            Explanation: 
 
                              
 
                         
                     
                    
                    
                    
                    
                    
                    
                 
             
			
			
Read more: