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

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

You are carrying cargoes of crotonaldehyde，phosphoric acid，and morpholine on your multiple-product tanker. Which of the following statements is TRUE?

A.Each of the cargoes must be segregated from the other by at least two barriers

B.The minimum protective clothing required for taking samples of phosphoric acid is goggles or a face shield

C.Aluminum，copper，and zinc are prohibited in all valve parts in contact with these cargoes

D.The required warning sign must have the legend "cancer hazard" added to it

When carrying a cargo of asphalt or molten sulfur，which are carried at temperatures of over 300°F，one of the biggest dangers is ______.

A.water in the tanks or pipelines

B.having the cargo too cool

C.explosion of vapors after discharge

D.inadequate ullage space

Regulations require that cargo tanks in which grades B or C liquids are carried must be vented with which of the following ________．

A.Gooseneck vents

B.Flame screens

C.Pressure vacuum relief valves

D.Forced draft blowers

Regulations require that cargo pumps in tankers carrying grade D liquid cargo shall be isolated from sources of vapor ignition by ______．

A.Cofferdams

B.Gastight bulkheads

C.Passageways or living quarters

D.General cargo spaces

Why is gas-freeing rarely required for LPG cargo tanks?

A.LPG is compatible with all cargos

B.LPG's high oxygen content makes it nonvolatile

C.Cargo tanks are inspected less frequently than on oil tankers

D.The cargo tanks are used for one type of cargo only

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

Which method is used to supply inert gas from a flue gas system to the cargo tanks?

A.Exhaust gas pressure from the stack

B.High capacity fan

C.Inert gas compressor

D.Natural aspiration

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

The capacity of the segregated ballast tanks shall be ______ determined that the ship may operate safely on ballast voyages without recourse to the use of cargo tanks for water ballast except as provided otherwise．

A.Such

B.As

C.So

D.Well