The biological sewage treatment plant utilizes Oto completely break down the sewage into an acceptable substance for discharge-into anywaters
A.agitation function
B.bacteria
C.chemica
D.oxidizing function
A.agitation function
B.bacteria
C.chemica
D.oxidizing function
B.Building sealed tankers
C.Building pipelines
D.Building tankers
B.Section board
C.Emergency switchboard
D.Main switchboard
B.lowers the insulation value and is a common cause of fault grounds in idle machines
C.will enhance insulation resistance only if it is no salt
D.reduces the amount of current supplied or drawn by the machine so horsepower is limited
B.If there is high differential the filters pressure across the circulating
pumps is alarmed
C.The lubricating oil purifier cannot take oil from the drain tank
D.If the sea water pressure falls, this also operates an alarm
B.overload due to reduced voltage output and increased current
C.continue to share the active load(kw)but have high very reactive load
D.try to take all the load and so trip the main circuit breaker
B.derivative control
C.two-position control
D.integral control
B.fire point
C.upper explosive limit
D.lower explosive hmlt
The effect that exhaust gas recirculation can reduce NOX formation is partly due to a reduction of the()concentration in the combustion zone and partly due to the content of water and carbon dioxide in the exhaust gas.
A.Oxygen
B.Nitrogen
C.Sulphur
D.Freon
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