【正文】 injection may be_____ as the engine load is reduced. A. advanced B. retarded C. kept constant D. none of the above *0717 With V1T the start of injection may be_____ as the engine load is reduced within a certain range. A. advanced B. retarded C. relayed D. cut off 負(fù)荷減小 ， 定時(shí)提前以維持最大爆發(fā)壓力 Jimei University 0718 With VIT unit the timing of fuel injection of an engine can be regulated automatically according to the_____. A. ship draft B. pitch C. engine load D. oil viscosity *0719 Worn out ring grooves should be_____ to standard dimension after being welded. A. machined B. bored C. honed 油石 磨 D. drilled Jimei University 0720 You increased the_____ to 150 tons that39。 (2) expansion。s load C. the fuel oil temperature D. the fuel oil flow Jimei University 0627 The viscosity regulator controls the_____ of the fuel oil in order to provide the oil at the correct viscosity for bustion. A. temperature B. pumping rate C. pressure D. heat 0628 The viscosity regulator controls the fuel oil temperature_____ provide oil at the correct viscosity for bustion. A. in order that B. because of C. in order to D. owing to Jimei University 0629 The way to reduce_____ is to build up a film of lubricant between any two surfaces that rub against each other. A. friction B. collision C. inertia慣性 , 慣量 D. resistance 0630 The withdrawing of the cylinder liners, in general, depends on their_____. This may amount to approximately 1/120 of the diameter in some engines. A. correct maneuvering B. wear C. working efficiency D. maintenance Jimei University 0631 The words such as quantity, grade, viscosity and specific gravity should be in the_____. A. repair list B. spare parts order list C. price list D. bunker list *0632 The work fuel 做功的燃油量 does in each working cycle can be obtained by taking the_____. A. precautions B. rpm C. indicator cards D. B and C Jimei University 0633 The working cycle of a fourstroke diesel engine consists of four events: (1) pression。s maintenance? A. cetane十六烷 number B. flash point C. viscosity D. setting point Jimei University 0695 Which of the following can be directly obtained by means of an indicator card? A. power B. maximum pressure in a cylinder C. mean pressure in a cylinder D. all of the above Jimei University 0696 Which of the following can be obtained by means of an indicator card? A. the peak pressure in a cylinder B. the temperature of the cooling water C. the fuel consumption D. none of the above Jimei University *0697 Which of the following firing order may be used for an 6 cylinder engine? A. 123456 B. 123654 C. 153624 D. 134562 0698 Which of the following is a factor of fuel oil almost having nothing to do with the formation of bustion products? A. setting point B. ash C. sulfur content D. carbon residues Jimei University 0699 Which of the following is true about the fuel injection with an ordinary diesel engine? A. The process begins after TDC. B. The process ends before TDC. C. When the piston is near to the TDC the fuel injection ends. D. None of the above is true. Jimei University 0700 Which of the following may cause that an engine doesn39。d better take_____ to save fuel consumption, you know it would be useless to get there earlier. A. nominal speed B. economical speed C. rated speed D. slow speed *0668 What is used for measuring the main bearing ? A. Pressure gauge B. Dial gauge度盤式指示器 C. Bridge gauge D. Power meter Jimei University 0669 What is used to purify water and foreign matters from the fuel oil in the following? A. pressor B. separator C. evaporator D. fuel pump 0670 When_____ is operated, a supply of pilot air enables the remote valve to open. A. the distributor B. the air start lever C. the turning gear D. the cylinder air start valve Jimei University 0671 When_____ is pressed, its temperature rises so that it ignites the fine spray of fuel injected into the cylinder. A. the oil B. the air C. the fresh water D. the steam 0672 When a centrifuge is arranged to separate impurities and small mount of water from oil, it is known as a_____. A. purifier B. separator C. filter D. clarifier Jimei University 0673 When a crankshaft_____ outside the engine, it should be carefully supported in a manner which will avoid imposing high bending moments on it. A. has to be handled B. may be handled C. has being handled D. will be handling Jimei University *0674 When a crankshaft has to be handled outside the engine, it should be carefully supported in a manner which will_____ high bending moments on it. A. avoid imposing B. provide adequate C. avoid to impose D. provide with adequate Jimei University 0675 When a crankshaft has to be handled outside the engine, it should be carefully supported in a manner which will avoid_____ high bending moments on it. A. pressing B. interposing C. imposing D. pounding Jimei University *0676 When ships are in port, it is the time when opportunity