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The cooling of the piston is carried out by circulating _____ across the underside of the crown and...

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lubrication  injection  cooling  combustion  
a sump tank  a feed well  a double bottom tank  a drain tank  
atop the piston crown  beneath the piston crown  at the base of the piston skirt  inside the cylinder liner cooling water jacket  
a low load on that cylinder  sluggish piston ring action  excessive piston crown cooling  excessive clearance of piston pin  
recirculating  total loss  cooling  refrigeration  
insufficient lubrication  improper piston cooling  blow-by  overload operation  
low loading of that cylinder  faulty combustion in that cylinder  sluggish piston ring action  excessive piston cooling  
cooling jacket  cylinder liner  piston crown  cylinder cover  
cylinder liners and piston rings  main bearings  crankpin bearings  turboblower  
pre-injection fuel oil treatment  lube oil filtration  lube oil purification  piston cooling  
an oil seal  removing heat  a gas seal  cooling the piston  
poor cooling of cylinder walls  improper cooling of the piston  insufficient piston lubrication  all of the above  
to help  to limit  to protect  to remove  
Because the piston is exposed to very high temperature, it must be cooled  The lower the piston cooling temperature is, the better it is  Both water and lube oil can be used as coolant  One of the piston cooling methods is vibration cooling, with better effect  
loss of suction in the circulating pump  leak in the primary cooling system  broken raw water pump shaft  burned or cracked piston in one cylinder  
piston cooling  sleeve cooling  central cooling  jacket cooling  
between, to  either, or  from, to  neither, nor  
Diesel oil  Hydraulic oil  Lube oil  Mineral oil  
water cooling  oil cooling  air cooling  combined cooling  
oil spray  oil bath  oil control rings  drilled passage through the camshaft  

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