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194. Using the oil chart provided in the illustration for guidance, what would be the recommended straight weight petroleum oil to use in a main engine speed control governor on your fishery research vessel, if the governor is to remain in the acceptable operating range and the governor oil operating temperature may drop as low as 40°F
SAE 10 is the correct choice because, at 40F, its viscosity falls within the ideal operating range as indicated on chart MO-0161, ensuring proper governor function.
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