A.the highest
B.above 3/4
C.1/2-3/4
D.the lowest

A.achromatism or thin gray
B.thin white
C.sky-blue
D.black

A.notify the duty officer, reduce the engine speed, take some measures to remove failures
B.notify the duty officer and stop the engine immediately, find the cause and remove failures
C.notify the C/E
D.notify the captain

A.2
B.3
C.4
D.5

A.open the indicator cocks
B.supply some LO to cylinder liner wall with lubricator
C.put the fuel handle in the "stop" position
D.pump up the air bottle

A.cooling water of the cooling system
B.fuel of the FO system
C.LO of the LO system
D.cooling water of the cooling system and LO of the LO system

A.to reduce heat stress
B.to reduce low temperature corrosion
C.to improve firing and starting performance
D.fuel saving

A.to inspect if the cylinder has the water leakage
B.to expel out the residual water/gas/oil from the cylinder
C.to check if fuel supply is normal
D.A and B

A.the main engine in the stand-by condition
B.auxiliary machinery in the stand-by condition
C.dynamical equipments in the stand-by condition and could be used immediately
D.A and B

A.engine trails should be done after finishing the operation of turning the engine with the turning gear and starting the engine on air briefly
B.in the operation of engine trails, the main engine should be running in low-speed
C.As to the ship equipment with twin main engine, engine trials should be done with one engine ahead and another engine astern at the same time
D.the order “engine trials” should be given by the bridge