All marine low-speed diesels are of what design?（）

A . general communication B . distress alerting and safety calling C . receive MSI D . both B and C

A、the use of a poor quality oil B、the deterioration of its properties C、the formation of deposits D、the reduction in heat transfer ability

A . The diesel oil must never be allowed to mix with the heavy fuel B . The temperature of the fuel from the pre–heater should be gradually reduced after switching over the three–way valve C . The heating steam to the pre-heater should be secured as soon as the diesel fuel passes through the three-way valve D . The heating steam must be secured before the diesel oil passes through the three-way valve

A . every day B . every week C . every month D . every year

A . only one person may talk at a time B . only two persons may talk at the same time C . the radio only transmits D . the radio only receive

A . an allision that results in $500 damage to a boat dock B . an injury to a crewmember，passenger，or other person which requires professional medical treatment beyond first aid C . grounding of a vessel on a sandbar that does not result in injuries and/or any damage to the vessel D . None of the above

A . 能抵御所有已知溶剂和98%的海运散装化学品，亦具有良好的物理性能 B . 酸、碱溶剂均不能破坏其结构，其外在的物理性能反而一般 C . 对酸、碱的侵蚀很敏感 D . 对吸收货品速度慢，但吸收率高，释放慢，并会留下痕迹

A . direct action of cam shaft B . compressed air pressure C . hydraulic “push rods” D . direct action of the main piston moving dow

A . cylinder heads B . exhaust valves C . scavenging air D . injector

A . dial indicator B . outside caliper C . bridge gauge D . tram rod

A . fuel oil vapor at the sludge tank vent B . unburned fuel vapors in the scavenge air receiver C . lube oil vapors in the crank case D . lube oil vapors in the engine room

A . build up the piston crown by metal spraying B . build up the cylinder head by metal spraying C . insert shims between the crankpin bearing box and the connecting rod foot D . install a thinner head gasket

A . aeration tanks B . settling tanks C . disinfection agent D . anaerobic bacteria

A . Chart Number only B . Chart Number + Previous NM Number/Year C . Chart Number + Between Previous and Present Dates D . Cumulative Number

A . Cisco Proprietary payload compression B . Predictor payload compression C . RTP header compression D . TCP header compressio

A . Electric B . Hydraulic C . Air D . All of the above

A . decrease the time required between cleanings B . removes all large and small foreign objects C . ensure a positive flow of oil at all times D . ensure that all lube oil has been treated twice

A . bacteria B . moulds C . yeasts D . seal

A . Manually trip the over-speed device B . Interrupt the fuel flow to the engine C . Disengage the safety interlock D . Slide the camshaft to the neutral positio

A . the extra weight required for the diesel reduction gearing B . a minimum speed for the engines that limits the minimum speed of the vessel C . the higher fuel consumption per SHP D . the low efficiency of the system when a controllable pitch propeller is used

A . fuel pump should be removed and all connections blanked off B . cylinder oil feed rate should be increased slightly above that used at normal sea speed C . cylinder oil feed rate should be reduced D . cylinder oil feed rate should be increased to the maximum flow capable of the metering pum

A. fire or explosion B. fall of market prices C. sinking of the vessel D. delay in transit

A.contract of carriage of goods by sea B.evidence of contract of carriage of goods by sea C.contract of carriage of goods by air D.evidence of contract of carriage of goods by air