问题：
[单选] Fuel is not supplied to the corresponding cylinders due to （）.
a failure of the motor。a failure of lubricator。a failure of cylinder。a failure of fuel pum。
问题：
[单选] Fuel oil is pumped by means of （） from the bunker tanks.
a transfer pump。a bilge pump。a service pump。a vacuum pum。
问题：
[单选] Fuel oil is thought to be one of the main factors （） the operation and maintenance of an engine.
have nothing to do with。having nothing to do with。have much to do with。having much to do with。
问题：
[单选] Fuel pump index is （）.
the viscosity index。the fuel oil contents。the starting speed。the reading at the rack。
问题：
[单选] Fuels of high quality with their earlier ignitions will cause higher （）pressure in cylinders of a diesel engine.
compression。maximum。rated。oil。
问题：
[单选] Generally the function of lubrication is to form of a film of lubricant between any two surfaces that have relative （）, so that surfaces dont get touch with each other.
gravity。motion。ratio。density。
问题：
[单选] Generally the gudgeon pin is fully floating in both connecting rod small end and （）.
the crosshead。the crankshaft。large end。the piston bosse。
问题：
[单选] He said that he had turned the main engine one complete revolution with the （）.
turning gear。steering gear。spur gear。chain gear。
问题：
[单选] Head tank should be used to remove （） from cooling water.
scale。sludge。chemicals。air。
问题：
[单选] Heat energy is a source of power, but （） will cause damage to the engine.
excessive heat。insufficient heat。effective cooling。high output。
