Cylinder Head Specialist









No. of Questions= 10 




















     1. 

Typical valve guide clearance is ________.
        
    
        



    

    
















    
    
    

    


    

    

    
    
        a)
        
    0.0003 to 0.0008 inch (0.008 to 0.02 millimeter)
        
    



    

    

    
    
        b)
        
    0.001 to 0.003 inch (0.025 to 0.076 millimeter)
        
    



    

    

    
    
        c)
        
    0.005 to 0.008 inch (0.13 to 0.20 millimeter)
        
    



    

    

    
    
        d)
        
    0.010 to 0.015 inch (0.25 to 0.38 millimeter)
        
    



    
    

    

    
    







    
    
        

        








     2. 

Oversize stem valves are being installed in a cast-iron cylinder head with integral valve 
guides.  Machinist A says that the old guide must be reamed.  Machinist B says that the 
valve guide should be replaced.  Which machinist is correct?

        
    
        



    

    
















    
    
    

    


    

    

    
    
        a)
        
    Machinist A only
        
    



    

    

    
    
        b)
        
    Machinist B only
        
    



    

    

    
    
        c)
        
    Both Machinist A and B
        
    



    

    

    
    
        d)
        
    Neither Machinist A nor B
        
    



    
    

    

    
    







    
    
        

        








     3. 

Two machinist are discussing knurling valve guides.  Machinist A says that the valve guide   should be reamed before the knurling operation.  Machinist B says that the valve stem-to-
valve guide clearance is usually one-half of the new guide clearance.  Which machinist is 
correct?

        
    
        



    

    
















    
    
    

    


    

    

    
    
        a)
        
    Machinist A only
        
    



    

    

    
    
        b)
        
    Machinist B only
        
    



    

    

    
    
        c)
        
    Both Machinist A and B
        
    



    

    

    
    
        d)
        
    Neither Machinist A nor B
        
    



    
    

    

    
    







    
    
        

        








     4. 

Machinist A says that replacement guides are pressed into the cylinder head.  Machinist B 
says that the replacement guide should be reamed or honed after installation.  Which 
machinist is correct?
        
    
        



    

    
















    
    
    

    


    

    

    
    
        a)
        
    Machinist A only
        
    



    

    

    
    
        b)
        
    Machinist B only
        
    



    

    

    
    
        c)
        
    Both Machinist A and B
        
    



    

    

    
    
        d)
        
    Neither Machinist A nor B
        
    



    
    

    

    
    







    
    
        

        








     5. 

Machinist A says that a bronze thin-walled insert can be used to repair a worn valve guide.  
Machinist B says that a thin-walled insert is used with an oversize stem valve.  Which       machinist is correct?

        
    
        



    

    
















    
    
    

    


    

    

    
    
        a)
        
    Machinist A only
        
    



    

    

    
    
        b)
        
    Machinist B only
        
    



    

    

    
    
        c)
        
    Both Machinist A and B
        
    



    

    

    
    
        d)
        
    Neither Machinist A nor B
        
    



    
    

    

    
    







    
    
        

        








     6. 

Machinist A says that aluminized valves should not be machined.  Machinist B says that the 
tip of the valve stem should be filed before the valve is removed from the cylinder head.  
Which machinist is correct?

        
    
        



    

    
















    
    
    

    


    

    

    
    
        a)
        
    Machinist A only
        
    



    

    

    
    
        b)
        
    Machinist B only
        
    



    

    

    
    
        c)
        
    Both Machinist A and B
        
    



    

    

    
    
        d)
        
    Neither Machinist A nor B
        
    



    
    

    

    
    







    
    
        

        








     7. 

Machinist A says that sodium-filled valves should not be ground.  Machinist B says that 
sodium-filled valves require greater valve guide clearance than standard valves.  Which 
machinist is correct?

        
    
        



    

    
















    
    
    

    


    

    

    
    
        a)
        
    Machinist A only
        
    



    

    

    
    
        b)
        
    Machinist B only
        
    



    

    

    
    
        c)
        
    Both Machinist A and B
        
    



    

    

    
    
        d)
        
    Neither Machinist A nor B
        
    



    
    

    

    
    







    
    
        

        








     8. 

Machinist A says that mushroomed valves should be replaced.  Machinist B says that 
guttered valves should be replaced.  Which machinist is correct?

        
    
        



    

    
















    
    
    

    


    

    

    
    
        a)
        
    Machinist A only
        
    



    

    

    
    
        b)
        
    Machinist B only
        
    



    

    

    
    
        c)
        
    Both Machinist A and B
        
    



    

    

    
    
        d)
        
    Neither Machinist A nor B
        
    



    
    

    

    
    







    
    
        

        








     9. 

Machinist A says that a dead-blow hammer should be used against the valve retainer before 
the valves are removed.  Machinist B says that a valve spring should be compressed before 
the valve locks are removed.  Which machinist is correct?

        
    
        



    

    
















    
    
    

    


    

    

    
    
        a)
        
    Machinist A only
        
    



    

    

    
    
        b)
        
    Machinist B only
        
    



    

    

    
    
        c)
        
    Both Machinist A and B
        
    



    

    

    
    
        d)
        
    Neither Machinist A nor B
        
    



    
    

    

    
    







    
    
        

        








     10. 

Valve springs should be tested for ________.
        
    
        



    

    
















    
    
    

    


    

    

    
    
        a)
        
    Free height
        
    



    

    

    
    
        b)
        
    Squareness
        
    



    

    

    
    
        c)
        
    Spring force
        
    



    

    

    
    
        d)
        
    All of the above
        
    



    
    

    

    
    







    
    
        

        


















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