Engine : Motor Plants and Auxiliary Boilers - 1399/947 |
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The upper piston rings in large, slow-speed, two-stroke cycle diesel engines are most effectively lubricated by oil __________. |
A) fed from mechanical lubricators |
B) thrown off from the main bearings |
C) supplied from wick fed drip lubricators |
D) flow from a centrifugal or banjo oiler |
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