The furnace of an oil fired boiler should be （） before the operating burner is lit.<br>A:filled with water<br>B:purged<br>C:cleared of air<br>D:None of the above is true

The furnace of an oil fired boiler should be （） before the operating burner is lit.
A:filled with water
B:purged
C:cleared of air
D:None of the above is true

出自：海船船员证

提示：
同一【IP】的非会员用户每天可免费获取10次答案

收藏本站【zk.995w.com】，下次访问不迷路

本站试题总数:【10244552】个 (题库试题定时更新)