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單項(xiàng)選擇題

Which operation may cause the pressure in an inert tank to fall below the prescribed limits（）.

A.Loading
B.Discharging
C.Crude oil washing
D.Steaming tanks

單項(xiàng)選擇題

Which of the following statements is FALSE concerning cranes being installed on the centerline of vessels（）.

A.A centerline crane can never be operated in tandem
B.One crane is able to work one end of two adjacent hatches
C.These cranes are more economical and weigh less than outboard-mounted cranes
D.One crane is able to work both sides of the ship