单项选择题
The concentration of total dissolved solids in the water of an auxiliary boiler can increase as a result of （）.
A.seawater contamination
B.frequent surface blows
C.dissolved oxygen deaeration
D.frequent bottom blows
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相关考题
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单项选择题
The water in an auxiliary boiler should be tested for chloride content to determine （）.
A.total dissolved solids
B.salt contamination
C.water hardness
D.chlorine contamination -
单项选择题
Cooling the intake air supplied to a diesel engine will （）.
A.reduce mean effective pressure
B.decrease average compression pressure
C.decrease air charge density
D.increase power output -
单项选择题
Excessive vibration of an automatically fired auxiliary boiler can be caused by （）
A.air or water in the furnace
B.combustion pulses
C.fuel oil pump failure
D.flame failure
