9. The lubricating-oil_____ employs the centrifugal force to remove very small particles from the lubricating oil. (A) strainer (B) filter (C) purifier (D) pump

11. A ship’s propulsion plant should be rated such that the desired ship speed can be attained with additional power capabilities held in reserve to allow for a degradation of performance with time. In this regard, what factor summarized below is not considered? (A) The fouling and roughening of hull. (B) The global warming effects. (C) The reductions in the performance of prime mover. (D) The roughening of the working sections of propeller.

9. The lubricating-oil_____ employs the centrifugal force to remove very small particles from the lubricating oil.
(A) strainer
(B) filter
(C) purifier
(D) pump

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