單項(xiàng)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


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1.單項(xiàng)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

2.單項(xiàng)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

3.單項(xiàng)選擇題The temperature of the fuel oil received during bunkering operations is critical in determining the（）

A.expansion space to leave in a tank
B.flash point at which the fuel will burn
C.temperature to which the fuel must be heated
D.rate at which the fuel can be pumped during transfer operations

4.單項(xiàng)選擇題In a flash evaporator, scale as a result of higher than normal temperatures in most likely to occur in the （）

A.second stage feed heater
B.saltwater feed heater
C.distillate cooler
D.second stage vapor separator

5.單項(xiàng)選擇題Small droplets of water entrained in the flashed vapor produced in a flash-type evaporator, are removed by the （）

A.spray pipes
B.demisters
C.condensers
D.splash baffles