On a cargo vessel, fire and boat drills must be held within 24 hours of leaving port if the percentage of the crew replaced is more than （）.

A . open and individual tank valves open B . open and the individual tank valves closed C . closed and the individual tank valves closed D . closed and the individual tank valves ope

A . allowing better access in an emergency B . eliminating potential fuel sources C . eliminating trip hazards D . improving personnel qualificatio

A . at least 13.1 feet away from the galleys，living quarters or navigation spaces B . from the open deck C . only from areas equipped with power ventilation systems D . isolated from any part of the vessel which normally contains sources of vapor ignitio

A . fire ax B . flashlight C . rigid helmet D . flame safety lam

A . in the pumproom B . at the vent header C . at the main deck manifold D . the midships house

A . blows the fire back toward the vessel B . comes over the bow C . comes over the stern D . comes over either beam

A . Blanket the cargo spill with foam B . Prevent the spread of fire with a foam dam C . Apply CO on burning fuel at its source D . Shut off the transfer of cargo

A . Start each fire pump B . Launch aand run a lifeboat C . Inventory rescue and fire equipment D . Inspect fire hose

A . testing all alarm and detection systems B . breaking out and using the vessel's emergency equipment C . participation by selected crew members D . one person putting on protective clothing，if the vessel is so equipped

A . stow the hazardous cargoes on deck available for jettisoning if necessary B . remove the hazardous cargo labels from a portable tank after the tank is emptied C . have the shipping papers indicate the proper shipping name and the technical name of n.o.s. cargoes D . log the receipt of hazardous cargoes in the Official Logbook

A . starting the fire pumps B . checking firemans outfits and other personnel rescue equipment C . checking relevant communications equipment D . All of the above

A . in an inside passageway B . in an approved bracket C . so that it is accessible from the bridge of the vessel D . so that it will float free if the vessel sink

A . Fire ax B . Flashlight C . rigid helmet D . Fresh air breathing apparatu

A . consealed B . detained C . contained D . kept

A . Bouncing a straight stream of water off the overhead to create spray effect B . Spraying foam on a bulkhead and letting it flow down and over a pool of burning oil C . Flooding a paint locker with CO and sealing the compartment D . Cooling adjacent bulkheads with water to prevent the spread of the fire by conductio

A . Certificate of Inspection B . Certificate of Seaworthiness C . Classification Certificate D . Certificate of Registry

A . opening dead spaces to check for heat or fire B . evacuation of the vessel C . sounding the "all clear" signal D . operation of the emergency generator

A . for 1 year B . for 2 years C . until the next Coast Guard inspection D . until the vessel's Certificate of Inspection expire

A . Any compartment containing explosives B . Any compartment adjacent to one containing explosives C . Enclosed spaces which are specially suitable for vehicles D . All of the above

A . At least one fire and drill shall be held within 24 hours of leaving a port where more than 25 percent of the crew has been replaced B . The Master is responsible in seeing thst each lifeboat is lowered to the water at least once in each 6 months C . Lifeboat equipment shall be examined at least once each month to insure that it is complete D . An entry shall be made in the vessels official Logbook relative eo each fire and boat drill

A . At least one fire and boat drill shall be held within 24 hours of leaving a port where more than 25 percent of the crew has been replaced B . The Master is responsible in seeing that each lifeboat is lowered to the water at least once in each 6 months C . Lifeboat equipment shall be examined at least once each month to insure that it is complete D . An entry shall be made in the vessel's Official Logbook relative to each fire and boat drill

A . Carbon dioxide B . Water (stored pressure) C . Foam D . Carbon tetrachloride

A.testing all alarm and detection systems B.breaking out and using the vessel's emergency equipment C.participation by selected crew members D.one person putting on protective clothing，if the vessel is so equipped