单项选择题
A.no combustion B.deposits in the fuel C.excessive air in the fuel D.cold fuel oil
When the boiler load returns to normal, the drum pressu...
单项选择题When the boiler load returns to normal, the drum pressure will rise and steam bubble formation will reduce, causing a fall in water level This is known as （）.
A.swell B.shrinkage C.flash off D.lack of water
WHR stands for （）.A.Water Head RegisterB.Water Heater R...
单项选择题WHR stands for （）.
A.Water Head Register B.Water Heater Re-circulating C.Waste Heat Recovery D.Waste Handle Reference
As for a oil-fired boiler too much air would indicated ...
单项选择题As for a oil-fired boiler too much air would indicated by （）.
A.yellowish flame B.golden yellow flame C.milky flame D.brilliant white flame
