Which of the listed fire extinguishers cannot be easily recharged aboard ship?（）

A . Commence draining that tank as quickly as possible B . Seal off all vents to that tank C . Activate the CO system to that tank D . Shut off the steam heating coil

A . Develop ductility B . Improve machining qualities C . Relieves stresses D . All of the above

A . Dry chemical B . Halon C . Low velocity fog D . Steam

A . Dehydrators must be used continuously in a refrigeration system B . A 25 ton refrigeration system has the same cooling effect as melting 25 tons of ice in 24 hours C . A thermostatic expansion valve is used to control refrigerated space temperature D . The liquid receiver functions to collect and remove non- condensable gase

A . Classes A and B B . Classes B and C C . Classes C and D D . Classes A and D

A . More than six short blasts and one long blast on the whistle B . Continuous blast of the ships whistle for a period of not less than 10 seconds supplemented by the same signal on the general alarm C . Three short blasts of the whistle supplemented by the same signal on the general alarm D . More than six short blasts and one long blast on the whistle supplemented by the same signal on the general alarm

A . Dry chemical B . Foam C . Water D . Carbon dioxide

A . Class "A" B . Class "B" C . Class "C" D . Class "D&quot

A . Fuel oil B . Wood C . Celluloid D . Electrical insulatio

A . Overcoming sliding friction B . Overcoming rolling friction C . Overcoming fluid friction D . Overcoming oil wedge frictio

A . Hydraulic oil B . Lubricating oil C . Diesel oil D . Refrigeration oil

A . Individual statements in a named access list may be deleted. B . They require a numbered range from 1000 to 1099. C . When created, they must be specified as standard or extended. D . They are created with the ip access-list command. E . The entire access list must be deleted before editing. F . They are applied with the ip name-group command.

A . Improper fuel rack positioning B . Lengthy opening of the exhaust valve C . Excessively early injection timing D . Extended light load operatio

A . Foam B . Soda acid C . Dry chemical D . Carbon dioxide

A . They should always be started with the discharge valve closed B . They should always be started with the discharge valve opened C . A priming pump is always required to flood the impeller suction D . They should always be started with the sealing line valves closed

A . Acetylene B . Lube oil C . Grease D . All of the above

A . Expansion valve B . Evaporator C . Drier D . Receiver

A . Rose box B . Sea chest or spool piece C . Sluice valve D . Fire pump stuffing box

A . Class "A" and class "B" B . Class "B" and class "C" C . Class "A" and class " C" D . Class "C", class "D", and class "E&quot

A . Conduction of heat to adjacent surfaces B . Direct radiation C . Convection D . All of the above

A . Magnesium B . Paper C . Wood D . Diesel Oil

A . A power end and fluid end B . A propeller and educator C . A volute and impeller D . A turbine and pisto

A . class A B . class B C . class C D . class D

A.CO2 B.ABC dry chemical C.CO2 propelled foam D.All of the above