单项选择题
A.seawater contamination B.frequent surface blows C.dissolved oxygen deaeration D.frequent bottom blows
The water in an auxiliary boiler should be tested for c...
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
Cooling the intake air supplied to a diesel engine will...
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
Excessive vibration of an automatically fired auxiliary...
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
