海船船员考试
单选题The diffuser prevents pressure pulses from one cylinder （） another during operation.A to interfere withB interfering withC to help scavengingD helping scavenging
题目
to interfere with
interfering with
to help scavenging
helping scavenging
相似问题和答案
第1题：
Mooring lines should be turned end-for-end occasionally. This is because ______.
A.a line is weakened by constantly pulling on it in one direction
B.normal wear on the line is thus distributed to different areas
C.it prevents the line from kinking or unlaying
D.it prevents permanent misalignment of the line’s internal strands
系缆需要经常换向使用，是因为正常的受力磨损被分散到不同的部分。
第2题：
lower than normal cylinder pressure and low exhaust temperature
lower than normal cylinder pressure and high exhaust temperature
higher than normal cylinder pressure and low exhaust temperature
higher than normal cylinder pressure and high exhaust temperature
第3题：
During the valve overlap period, the exhaust pressure of a turbocharged four-stroke/cycle diesel engine must be less than the intake manifold pressure to ensure ______.
A.effective cylinder scavenging and cooling
B.constant pressure from the turbochargers
C.cooler operation of the exhaust system
D.effective constant pressure for turbocharger operation
第4题：
nuts and bolts
new joints
spring force
sealing rings
第5题：
a leaking fuel injection nozzle
a clogged air filter
early fuel injection
burned valves
第6题：
worn cylinder liner
faulty cylinder relief valve
excessive lube oil pressure
excessive scavenge air pressure
第7题：
feel the high pressure fuel line
check the cylinder exhausts for white smoke frequently
check the cylinder exhaust temperature
isolate each cylinder and inspect the injector
第8题：
______ is not a job of the radar antenna．
A.To receive the high-frequency pulses from the transmitter
B.To focus the pulses into a beam，and send them into space
C.To pick up reflected pulses coming from objects that have been struck by the beam
D.To reflect microwaves
第9题：
effective cylinder scavenging and cooling
constant pressure from the turbochargers
cooler operation of the exhaust system
effective constant pressure for turbocharger operation
第10题：
a defective or broken high pressure un-loader
a loose valve plate
excessive overload
no compression