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
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相关考题
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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 -
单项选择题
When there is a flame failure in an automatically fired auxiliary boiler, the ().
A.air supply is shut off
B.fuel supply is shut off
C.water supply is shut off
D.safety valve lifts
