问题：
[单选] A two-stroke diesel engine exhaust temperature will be lower than a four-stroke diesel engine of the same displacement because the （） (1) MEP is lower and the scavenging air is cooling the exhaust gases (2) valve overlap in a four-stroke
(1) only is correct。(2) only is correct。both (1) and (2) are correct。Neither (1) or (2) are correct。
问题：
[单选] In order to reverse the rotation of a two-stroke/cycle loop scavenged, direct reversing, propulsion diesel engine, the cam positions must be changed for the （）.
starting air and fuel pumps。piston cooling pumps。exhaust valves。all of the above。
问题：
[单选] Misalignment of the drive shaft and propeller shaft flanges can be detected by using a dial indicator or （）.
inside micrometer。feeler gauge。adjustable trammel。sighting device。
问题：
[单选] What is the crank angle between any two crank throws in the firing order of a four-stroke/cycle, in line, eight cylinder diesel engine?（）
45。60。90。100。
问题：
[单选] The linear motion of a diesel engine piston is converted to the rotary motion required to drive gears, propeller shafts, and generators by the （）.
flywheel。crankshaft。journal bearings。camshaft。
问题：
[单选] High diesel engine cooling water temperatures can be caused by （）.
a worn water pump。not enough coolant。air in the cooling system。all of the above。
问题：
[单选] High diesel engine cooling water temperatures can be caused by （）.
air in the cooling system。an overhauled water pump。correct amount of coolant。no air in the cooling system。
问题：
[单选] A viscous damper, as used on a marine diesel, is a sealed precision built device which dampens the torsional vibrations in the （）.
camshaft。flywheel。crankshaft。thrust shaft。
问题：
[单选] Loss of lubricating oil pressure to the main propulsion diesel engine will actuate a/an （）.
overspeed trip。audible/visual alarm。the ships/boats general alarm。reserve oil storage tank。
问题：
[单选] When centrifuging heavy fuel oil, an important factor to consider is the （） (1) flow rate (2) viscosity of the fuel oil
(1) only is correct。(2) only is correct。both (1) and (2) are correct。neither (1) or (2) are correct。
