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

点击查看答案&解析

上一题目录下一题

相关考题

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

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

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