单选题Regulations require that cargo pumprooms on tank barges (constructed in 1965) carrying grades B or C liquid cargoes have power ventilation systems which can completely change the air in （）.A 1 minuteB 3 minutesC 5 minutesD 10 minutes

In Cargo Survey，T．C．V．refers to ______．

A.total calculated volume

B.terminal cargo volume

C.tank cargo valve

D.tolerance of cargo valve

Which cargo would require a dangerous cargo manifest ________．

A.Cotton

B.Wheat

C.Sugar

D.Lumber

Prior to burning or welding on a fuel tank on a ship，regulations require that an inspection be made. An entry in the unofficial logbook is required if this inspection is made by ______.

A.a marine chemist

B.the Officer in Charge，Marine Inspection

C.the Master or person in charge of the ship

D.the National Fire Protection Association

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

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

Which barge in your tow would require a cargo information card to be carried in the pilothouse ________．

A.A tank barge with a sign reading No Visitors，No Smoking，No Open Lights

B.An open hopper barge carrying coal

C.A gas-free chlorine barge

D.An empty（not gas-free）barge that last carried benzene

Regulations concerning the stowage，lashing，and securing of timber deck cargoes aboard general cargo vessels may be found in the ______．

A.International Cargo Bureau Regulations

B.Load Line Regulations

C.Rules and Regulations for Cargo and Miscellaneous Vessels

D.Vessel's classification society rules and regulations

The purpose of inert gas systems aboard tank vessels is to ______.

A.allow sufficient oxygen in the tank to sustain life

B.prevent outside air from entering the tank

C.provide increase in cargo discharge pressure

D.comply with double hull pollution prevention regulations

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

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