Engineering  :: Strength Of Materials  
            
            
         
     
    
	 
 
     
    
 
    
 
    
 
 
    
	
	
 
           
                      
        
  
    
    
    
        
            
			
			
            
            
                141.  
In case of a beam subjected to pure bending  
 
 
                
			 
				
					
				A.  
                 The stress intensity in any fibre is uniform 
				 				 B.  
                 The nature of stress in any fibre is identical 
				  
				 
				 				 C.  
                 The stress intensity in any fibre is proportional to the distance of the fibre from the neutral axis 
				 				 D.  
                 The stress intensity in any fibre is proportional to the distance of the fibre from the load carrying end 
				 				  
				 
				 				  
				    E.  
                    The stress intensity in any fibre is inversely proportional to the distance of the fibre from the bottom of the beam 
					
					      
                   
				 
				  
				 				 
				 
 
                    
                        
                        
                            Answer:   Option C 
 
                            Explanation: 
 
                              
 
                         
                     
                    
                    
                    
                    
                    
                    
                 
             
             
 
            
            
                142.  
The efficiency of a riveted joint is defined as the ratio of actual strength of the joint to that of solid plate. In this strength of the joint is considered in  
 
 
                
			 
				
					
				A.  
                 Tension 
				 				 B.  
                 Compression (bearing) 
				  
				 
				 				 C.  
                 Shear   
				 				 D.  
                 Least of (A), (B) and (C) above 
				 				  
				 
				 				  
				    E.  
                    None of the above 
					
					      
                   
				 
				  
				 				 
				 
 
                    
                        
                        
                            Answer:   Option D 
 
                            Explanation: 
 
                              
 
                         
                     
                    
                    
                    
                    
                    
                    
                 
             
             
 
            
            
                143.  
While evaluating the strength of riveted joint in shearing, bearing or tension the calculations are based on  
 
 
                
			 
				
					
				A.  
                 Actual size of rivet 
				 				 B.  
                 Actual size of hole drilled for the rivet 
				  
				 
				 				 C.  
                 Mean of the size of hole and drilled hole 
				 				 D.  
                 Smaller of the two holes 
				 				  
				 
				 				  
				    E.  
                    None of the above 
					
					      
                   
				 
				  
				 				 
				 
 
                    
                        
                        
                            Answer:   Option B 
 
                            Explanation: 
 
                              
 
                         
                     
                    
                    
                    
                    
                    
                    
                 
             
             
 
            
            
                144.  
A boiler shell 100 cm diameter and plate thickness 12 mm is subjected to an internal pressure of 1.2 N/m2. The hoop stress will be  
 
 
                
			 
				
					
				A.  
                 45 N/m2 
				 				 B.  
                 50 N/m2 
				  
				 
				 				 C.  
                 135 N/m2 
				 				 D.  
                 155.5 N/m2 
				 				  
				 
				 				  
				    E.  
                    180 N/m2 
					
					      
                   
				 
				  
				 				 
				 
 
                    
                        
                        
                            Answer:   Option B 
 
                            Explanation: 
 
                              
 
                         
                     
                    
                    
                    
                    
                    
                    
                 
             
             
 
            
            
                145.  
The longitudinal strain for a specimen is 0.01 and it is found to undergo 1 mm change in its thickness. The thickness of the specimen will be  
 
 
                
			 
				
					
				A.  
                 10 mm 
				 				 B.  
                 100 mm 
				  
				 
				 				 C.  
                 1000 mm 
				 				 D.  
                 400 mm 
				 				  
				 
				 				  
				    E.  
                    None of the above 
					
					      
                   
				 
				  
				 				 
				 
 
                    
                        
                        
                            Answer:   Option B 
 
                            Explanation: 
 
                              
 
                         
                     
                    
                    
                    
                    
                    
                    
                 
             
             
 
            
            
                146.  
A continuous beam is one which is  
 
 
                
			 
				
					
				A.  
                 Infinitely long 
				 				 B.  
                 Supported at two points only 
				  
				 
				 				 C.  
                 Supported at more than two supports 
				 				 D.  
                 Fixed at the ends and simply supported at intermediate point 
				 				  
				 
				 				  
				    E.  
                    None of the above 
					
					      
                   
				 
				  
				 				 
				 
 
                    
                        
                        
                            Answer:   Option C 
 
                            Explanation: 
 
                              
 
                         
                     
                    
                    
                    
                    
                    
                    
                 
             
             
 
            
            
                147.  
The ratio of central deflection in a beam freely supported at both ends to that when the beam is fixed at both ends and subjected to a central load W in both the cases would be  
 
 
                 
                    
                        
                        
                            Answer:   Option E 
 
                            Explanation: 
 
                              
 
                         
                     
                    
                    
                    
                    
                    
                    
                 
             
             
 
            
            
                148.  
During suddenly applied impact loading the stress developed to gradually applied load is  
 
 
                
			 
				
					
				A.  
                 1 
				 				 B.  
                 1.5 times 
				  
				 
				 				 C.  
                 2 times 
				 				 D.  
                 ?2 time 
				 				  
				 
				 				  
				    E.  
                    4 times 
					
					      
                   
				 
				  
				 				 
				 
 
                    
                        
                        
                            Answer:   Option C 
 
                            Explanation: 
 
                              
 
                         
                     
                    
                    
                    
                    
                    
                    
                 
             
             
 
            
            
                149.  
A pressure vessel is said to be thin walled when the ratio of internal diameter of the vessel and wall thickness is  
 
 
                
			 
				
					
				A.  
                 5 
				 				 B.  
                 10 
				  
				 
				 				 C.  
                 15 
				 				 D.  
                 More than 20 
				 				  
				 
				 				  
				    E.  
                    There is no such relationship 
					
					      
                   
				 
				  
				 				 
				 
 
                    
                        
                        
                            Answer:   Option D 
 
                            Explanation: 
 
                              
 
                         
                     
                    
                    
                    
                    
                    
                    
                 
             
             
 
            
            
                150.  
Hoop stress is  
 
 
                
			 
				
					
				A.  
                 Circumferential tensile stress 
				 				 B.  
                 Compressive stress 
				  
				 
				 				 C.  
                 Radial stress 
				 				 D.  
                 Longitudinal stress 
				 				  
				 
				 				  
				    E.  
                    None of the above 
					
					      
                   
				 
				  
				 				 
				 
 
                    
                        
                        
                            Answer:   Option A 
 
                            Explanation: 
 
                              
 
                         
                     
                    
                    
                    
                    
                    
                    
                 
             
             
 
        
 
			
			
			
			
			
 
 
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