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

相关考题

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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

As for an oil-fired boiler if at a normal steaming cond...

单项选择题

As for an oil-fired boiler if at a normal steaming condition and water goes out of sight in gauge glasses the action you should take is: （）
(1) secure oil to fires
(2) increase feed pump pressure

A.（1）
B.（1）and（2）
C.（2）
D.neither（1）nor（2）

船舶辅助机械

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 （）.