单项选择题 In a naturally aspirated diesel engine, the volume of air intake is directly related to engine （）.

单项选择题 To check the setting of the overspeed trip on a diesel powered generator, you would use a （）.

单项选择题 A large change in ambient temperature, or using an oil of a viscosity different from the one recommended by the manufacturer in a mechanical hydraulic governor, will result in the need to adjust the （）.