单项选择题
A.a flash generator B.a flash evaporator C.a vacuum boiling evaporator D.a boiler
When a boiler is operating, the water level in the gaug...
单项选择题When a boiler is operating, the water level in the gauge glass reads （） when the boiler is shut down.
A.lower than B.higher than C.as much as D.the same as
Where an excessive level of contamination is detected a...
单项选择题Where an excessive level of contamination is detected an alarm is sounded and diverting valves are operatedThe discharging liquid is then passed to （）.
A.overboard B.a bilge well C.a slop tank D.a hot well
For the intermediate condition, thermostats must be cor...
单项选择题For the intermediate condition, thermostats must be correctly set （）.
A.by trial and error B.by and large C.automatically D.very easily
