单选题 When the temperature of the refrigerant flowing out from the condenser is below the condensing temperature, it is said to be ____.

单选题 With ____, the engine needs not to be aligned with reduction gears or propeller shaft.

单选题 A crankshaft must be able to transmit the ____ developed during operation, which imposes stresses on the crankshaft journals.

单选题 ____ are mounted on and bolted to the bedplate cross girders.

单选题 The ____ are normally used to transfer fuel from bunker tanks to the settling tanks.

单选题 The liner is located within this jacket unit and ____ are provided to prevent water leakage.

单选题 The piston has passed the top dead center position and is being moved down by the ____ as the crankshaft rotates.

单选题 In crosshead engines, the circulating oil is protected by ____ from contamination.

单选题 Which of the following parameters has the greatest impact on fuel viscosity?