Cylinder Head Specialist









No. of Questions= 10 




















     1. 

Machinist A says that tapered plugs can be used to repair a crack in a cast-iron cylinder head. Machinist B says that the tapered plugs should be coated in sealant and installed side by side with other plugs.  Which machinist is correct?

        
    
        



    

    
















    
    
    

    


    

    

    
    
        a)
        
    Machinist A only
        
    



    

    

    
    
        b)
        
    Machinist B only
        
    



    

    

    
    
        c)
        
    Both Machinist A and B
        
    



    

    

    
    
        d)
        
    Neither Machinist A nor B
        
    



    
    

    

    
    







    
    
        

        








     2. 

A V-8 cylinder head has 0.001 inch (0.05 millimeter) of total warpage.  Machinist A says 
that the cylinder head should be resurfaced.  Machinist B says the cylinder head should also 
be checked for bend and twist.  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. 

Cylinder head gasket surface finish is measured in what units?
        
    
        



    

    
















    
    
    

    


    

    

    
    
        a)
        
    Millimeters
        
    



    

    

    
    
        b)
        
    Centimeters
        
    



    

    

    
    
        c)
        
    Microinches
        
    



    

    

    
    
        d)
        
    Nanometers
        
    



    
    

    

    
    







    
    
        

        








     4. 

Machinist A says that the finish of a cast-iron cylinder head gasket surface should be 
between 60 and 100 m in. Ra.  Machinist B says that the finish of an aluminum cylinder head 
gasket surface should be between 50 and 60 m in. Ra.  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 the valve timing will be retarded if material is removed from the 
head-to-block surface of the cylinder head of an overhead camshaft engine.  Machinist B 
says that the valve timing will be advanced if material is removed from the cylinder head on 
an overhead valve type of engine.  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. 

A V-type engine has had the head gasket surface refinished.  What other machining 
operation should be performed?

        
    
        



    

    
















    
    
    

    


    

    

    
    
        a)
        
    Machining the deck at least 0.008 inch to ensure a proper seal
        
    



    

    

    
    
        b)
        
    Machining the intake manifold
        
    



    

    

    
    
        c)
        
    Machining the exhaust manifolds
        
    



    

    

    
    
        d)
        
    All of the above
        
    



    
    

    

    
    







    
    
        

        








     7. 

Two machinists are discussing stress relieving a warped aluminum cylinder head.  Machinist 
A says that the head should be machined before stress relieving.  Machinist B says that the 
head should be bolted to a thick slab of steel and placed in an oven to soak for 5 hours.

        
    
        



    

    
















    
    
    

    


    

    

    
    
        a)
        
    Machinist A only
        
    



    

    

    
    
        b)
        
    Machinist B only
        
    



    

    

    
    
        c)
        
    Both Machinist A and B
        
    



    

    

    
    
        d)
        
    Neither Machinist A nor B
        
    



    
    

    

    
    







    
    
        

        








     8. 

A four-cylinder overhead camshaft engine cylinder head with integral cam bearings is being 
machined.  Machinist A says that the camshaft centerline should be realigned by boring the 
camshaft journals.  Machinist B says that the cylinder head should be straightened before the 
machining operation.  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 loose valve seat should be staked.  Machinist B says that the valve 
seat 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
        
    



    
    

    

    
    







    
    
        

        








     10. 

Machinist A says that a split-ball gauge and a micrometer can be used to determine valve 
guide clearance.  Machinist B says that holding a dial indicator against the side of the valve 
while the valve is held in the open position is specified by some manufacturers as a method 
for checking valve guide wear.  Which machinist is correct?

        
    
        



    

    
















    
    
    

    


    

    

    
    
        a)
        
    Machinist A only
        
    



    

    

    
    
        b)
        
    Machinist B only
        
    



    

    

    
    
        c)
        
    Both Machinist A and B
        
    



    

    

    
    
        d)
        
    Neither Machinist A nor B
        
    



    
    

    

    
    







    
    
        

        


















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