A.working at intervals and properly heating
B.warming up to 70℃, increase water supply flow
C.improving impulse of water supply
D.reducing water supply flow
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A.MARPOL Annex Ⅲ
B.MARPOL Annex Ⅵ
C.MARPOL Annex Ⅴ
D.MARPOL Annex Ⅳ
A.an International Ship Security Certificate
B.an International Oil Pollution Certificate
C.a Safety Management Certificate
D.an International Ballast Water Management Certificate
A.the master and the chief engineer are unable to communicate effectively
B.serious corrosion on the hull
C.damaged sanitary pump
D.one page missing in the oil record book
A.one year
B.two years
C.four years
D.five years
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
A.incorrect electrode setting
B.incorrect nozzle position
C.clogged fuel nozzle
D.broken high tension lead
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Flame failure in an automatically fired auxiliary boiler can from a/an （）
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