單項選擇題When the ship is going to enter into the harbor,（）

A.change from heavy fuel oil to diesel oil for mail engine
B.pumping oil bilge water
C.change sea chest form high level one to lower one
D.test emergency generator


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1.單項選擇題Which of the following represents the significance the fuel oil cetane number?（）

A.The cetane number has no affect on injection lag
B.The cetane number is an indication of the fuel’s viscosity
C.Ignition lag is reduced with fuels having a high cetane number
D.The cetane number is of little significance in the combustion

2.單項選擇題Which of the following conditions is realized by the turbo-charging of a previously naturally aspirated diesel engine?（）

A.Ignition lag increases
B.Lube oil system pressure increases
C.Brake specific fuel consumption increased
D.Mechanical efficiency increaded

3.單項選擇題Piston cooling fins are located（）

A.atop the piston crown
B.beneath the piston crown
C.at the base of the piston skirt
D.inside the cylinder liner cooling water jacket

4.單項選擇題The ship security assessment is an essential and integral part of the process of developing and updating（）

A.the ship security plan
B.the company security plan
C.the port security plan
D.the national security plan

5.單項選擇題If a vessel moored at a U-Sterminal does not comply with coast guard pollution prevention regulation, it may be detained by the （）

A.Inspector general
B.Captain of the port
C.local port authority
D.state pollution board