海船船员考试
单选题What is the purpose of the intake/exhaust valves in a diesel engine? （）A They regulate the combustion cycleB They supply cooling waterC They synchronize the ignition sparkD They supply and regulate the lubricant flow
题目
They regulate the combustion cycle
They supply cooling water
They synchronize the ignition spark
They supply and regulate the lubricant flow
参考答案和解析
相似问题和答案
第1题：
The closing of the exhaust valves used on a modern, large, low-speed, main propulsion diesel engine may be directly provided by_______.
A.large conical springs
B.compressed air pressure
C.hydraulic pressure
D.exhaust gas pressure
第2题：
after TDC
before TDC
after BDC
before BDC
第3题：
What is the function of the after-coolers installed in the diesel engine air intake system?
A.Decrease the air density
B.Increase the exhaust temperature
C.Decrease the lube oil temperature
D.Increase the air density
第4题：
before TDC and close after BDC
after TDC and close after BDC
before TDC and close before BDC
after TDC and close before BDC
第5题：
increase the density of the intake air
decrease turbocharger power usage
reduce exhaust gas temperature
compensate for turbocharger PRM fluctuations
第6题：
Fuel is admitted to a diesel engine cylinder through the ______.
A.injector nozzles
B.carburetor
C.exhaust ports
D.intake valves
第7题：
natural aspiration
masked intake valves
air cells
scavenging air
第8题：
Exhaust gases are generally removed from the cylinders of a two-stroke/cycle diesel engine by
A.natural aspiration
B.masked intake valves
C.air ceils
D.scavenging air
第9题：
blows out the exhaust gases
supplies oxygen for combustion
cools the valves and cylinder walls
all of the above
第10题：
Ⅰonly
Ⅱonly
bothⅠand Ⅱ
neitherⅠnor Ⅱ