海船船员考试
单选题Fuel is delivered into the combustion space by （）.A a cooling systemB a lubricating systemC an electric systemD an injection system
题目
a cooling system
a lubricating system
an electric system
an injection system
参考答案和解析
相似问题和答案
第1题：
no fuel will be delivered through the nozzle
the nozzle will overheat and crack
time of injection will change
fuel will leak into the drain line
第2题：
a shortened ignition delay period
a lean fuel/air mixture
excess fuel in the combustion chamber
rapid vaporization of injected fuel droplets
第3题：
Fuel droplets injected into a diesel engine cylinder must have adequate penetration to ____.
A.prolong the ignition delay period
B.ensure the beginning of fuel injection
C.thoroughly utilize the air charge
D.allow controlled fuel combustion
第4题：
high cost of fuel
serious fire hazard
possibility of pollution
poor combustion which will occur in that cylinder
第5题：
the combustion of gasoline releases photochemical active hydrocarbons
the combustion of gasoline embraces an intricate set of reactions
gasoline molecules have a simple molecular structure
gasoline is composed of small molecules
推断题。文章第二段提到“The combustion of larger molecules, which have multiple carbon-carbon bonds involves a more complex series of reactions. These reactions increase the probability of incomplete combustion and are more likely to release uncombusted and photochemical active hydrocarbon compounds into the atmosphere”，即这些反应会导致不完全燃烧，这里的“these reactions”指的就是a more complex series of reactions，因此B项“汽油的不完全燃烧包括一些列复杂的反应”与原文意思相符，为正确答案。
第6题：
prolonged maintenance intervals
improved atomization
greater fuel economy
incomplete combustion
第7题：
penetration
permanence
turbulence
atomization
第8题：
deliver proper fuel quantity to the injection nozzle
provide rapid fuel injection cutoff
control fuel quantity entering the pump body
control fuel pressure delivered to the combustion chamber
第9题：
ensure penetration and distribution of the fuel in the combustion chamber
ensure the needle valve is flushed clean during each injection
prevent combustion gas blowback into the open needle valve
prevent reflected pressure waves when the needle valve closes
第10题：
camshaft
main spring
rack position
nozzle orifice size