单项选择题

The interior of some diesel engine saltwater heat exchangers are protected from corrosion by the use of（）

A.aluminum plates
B.lead cathodes
C.copper baffle plates
D.sacrificial zincs

相关考题

Proper lubrication of the main bearing is more easily o...

单项选择题Proper lubrication of the main bearing is more easily obtained in a single acting four-stroke/cycle diesel engine than in a single acting two-stroke/cycle diesel engine because （）

A.bearing pressure in a four-stroke\cycle acting single diesel engine is continually reversed
B.bearing pressure in a two-stroke\cycle single acting diesel engine is continually reversed
C.the maximum bearing pressure is higher in a single acting two-stroke/cycle diesel engine
D.two-stoke/cycle diesel engines require more complicated lubrication piping

Which of the fuel injection systems listed uses a sprin...

单项选择题Which of the fuel injection systems listed uses a spring loaded differential spray needle valve and individual pump for each cylinder?（）

A.Common-rail injection
B.Air injection
C.Jerk pump injection
D.Distribution injection

The mode of control employed by an alarm circuit is a （...

单项选择题The mode of control employed by an alarm circuit is a （）

A.two position control
B.signal speed floating control
C.proportional speed floating control
D.reset control

船舶电气与船舶安全

The interior of some diesel engine saltwater heat exchangers are protected from corrosion by the use of（）