Access to a cargo pumproom on a tank vessel carrying grades

You are cleaning the tanks after carrying a cargo of crude oil. Which statement is TRUE?

A.Washing water should be recirculated if possible because it has the same electric potential as the cargo tank being cleaned

B.The hoses to portable cleaning machines should be disconnected before the machines are removed from the tank

C.The principal hazard with steaming cargo tanks is raising the ambient temperature above the flame point of the cargo residue

D.Steam cleaning and water washing are both capable of generating electrostatic charges within a tank

A bonding cable should be connected for cargo operations aboard a tank vessel as soon as the ______．

A.Cargo has been loaded or discharged

B.Cargo hose is connected

C.Cargo pumps are started

D.Vessel is ready to handle cargo

The valve on the discharge side of a cargo pump on a tank vessel will usually be a ______.

A.butterfly valve

B.spectacle valve

C.check valve

D.globe valve

Which spaces are required to be segregated from cargo tanks carrying grades A，B，C，or D cargoes ________．

A.Pump rooms

B.Enclosed deck spaces

C.Cofferdams

D.Navigation spaces

You are on a cargo vessel carrying toluol in bulk in portable tanks. Which is a requirement for pumping the toluol?

A.Hose connections to the tank must be made with a minimum of three bolts

B.There must be water pressure on the fire main

C.You must shut down if another vessel comes alongside

D.If transferring at anchor，you must display a red flag by day and a red light at night

Regulations require that cargo tanks carrying grades D or E liquids on tank barges be vented with ______．

A.Gooseneck vents and flame screens

B.Pressure-vacuum relief valves

C.Branch vent lines and a vent header

D.Forced draft blowers

To determine which grades of cargo a tank vessel is permitted to carry you should ______.

A.refer to the vessel's Certificate of Inspection

B.examine the cargo tanks and fittings

C.ask the terminal supervisor or his representative

D.check the loading order

Your tanker is carrying a cargo of styrene．Which of the following is NOT a requirement for carriage of this cargo ________．

A.P/V valves with galvanized parts must be replaced

B.Authorization to carry styrene must be endorsed on the Certificate of Inspection

C.You must have a Certificate of Inhibition provided by the shipper

D.The cargo tank heating coils must be blanked off