A.one year
B.two years
C.four years
D.five years
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A.Ring type
B.Fork type
C.Spade type
D.Push on pull off type
A.anaerobic bacteria
B.aerobic bacteria
C.air bubbles
D.disinfection chemicals
A.the temperature and flow quantity of the exhaust gas from M.E
B.the quantity of steam demanded
C.the rotary speed and the cooling water temperature of main engine
D.efficiency of M.E turbocharger
A.purge lube oil from the liquid refrigerant
B.recover water purged from the system
C.separate foul gases from the receiver
D.purge non-condensable gases without losing refrigerant
A.Sub-cooled liquid
B.Sub-cooled vapor
C.Superheated vapor
D.Liquid
最新試題
The condensers located in various stages of a flash evaporator are cooled by（）
During the diesel engine running, the water level of F.W expansion tank should normally kept in the （） level of glass tube.
Cold weather starting of a diesel engine may be made easier by（）
Which of the following items don’t belong to dock repair works?（）
Which of the diesel engine components listed increase air density and helps to improve engine operating efficiency?（）
（）are used to digest the sewage to produce innocuous sludge in a biological sewage treatment plant.
Diesel engine air start system check valves are opened by （）
Which one is NOT the ‘clear grounds’ for a more detailed inspection?（）
As soon as a diesel engine has started, which of the listed engine operating parameters should be checked FIRST?（）
The flash point of a residual fuel oil should be used to determine the highest temperature to which oil may be heated（）