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Air line lubricators are used in compressed air systems to lubricate _____.

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splash method  mechanical force feed lubricators  detached sump method  internal cooling passages in the crankshafts and connecting rods  
is used    are used    has been used    have been used  
is used    are used    has been used    have been used  
broken valve springs  tight drive belts  high line voltage  air in the system  
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frosting of the liquid line  higher than normal head pressure  a clear sight glass  abnormally cold reefer boxes  
exhaust valves  mechanical lubricators  cooling water pumps  fuel injection pumps  
Splash lubrication  Pressure lubrication  Sight feed lubricators  Mechanical lubricators  
combustion control air system  supply air system  ships service air system  low pressure deck air system  
maintain adequate coil back pressure  prohibit flashing in the liquid line  reduce refrigerant volume in the system  reduce compressor discharge line loading  
The fuel oil  The lube oil  The sea water  The fresh water  
failure of the fuel pumps  starting air pressure too low  stop valve in air line closed  the turning gear still engaged  
Holding the valve open for a long period  Increasing the starting air pressure used  Opening the stating air valve quickly  Reducing the starting air valve size  
used not to    are not used to    used to    are used to  
control air system  forced draft air system  supply air system  ships service air system  
stand-by engine  full ahead  finished with engine  full away  
are being used   have been used   has been used   had been used  
polluted, used to    polluted, are used to    polluting, used to    polluting, are used to  
the cylinder cover  the piston rings  the piston crown  the piston skirt  
is used  are used  has been used  have been used  

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