单项选择题
A.ensure feed water flow into the boiler B.keep the steam drum pressure high C.prevent water hammer in the feed line D.help the feed water flash to steam
If in doubt as to the true water level when a boiler is...
单项选择题If in doubt as to the true water level when a boiler is being oil-fired, you should （）.
A.take no measures B.extinguish the fire as soon as possible C.feed water to the boiler D.open the blow down valve
The boiler feed water check valves are located on the （...
单项选择题The boiler feed water check valves are located on the （）
A.feed pump suction line B.hot well C.shell of the feed heater D.feed lines to the boiler
The water level in a steaming auxiliary boiler will alw...
单项选择题The water level in a steaming auxiliary boiler will always （）
A.rise when the steam pressure is increased B.remain constant as long as the feed pump operates C.fall when the steam pressure is decreased D.vary as the steam demand changes
