單項選擇題A branch line valve of a fire extinguishing system on a ship must be marked with the（）.

A.maximum pressure allowed at that branch
B.name of the space or spaces which it serves
C.date of the last maintenance inspection
D.pressure needed to maintain an effective stream at that point


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1.單項選擇題（），as the chemical extinguisher agent，should be used for an electric fire.

A.dry chemical or foam
B.foam or soda acid
C.carbon dioxide or foam
D.carbon dioxide or dry chemical

2.單項選擇題The danger of a charged hose left unattended on deck with the nozzle open is（）.

A.the hose could burst
B.the nozzle end will whip about causing damage or injury
C.water damage to vessel's cargo or structure
D.personnel might trip over the hose

3.單項選擇題No outlet on a fire hydrant may point above the horizontal in order to（）.

A.avoid kinking the hose
B.avoid personal injury during connection
C.make connecting easier
D.prevent spray on electrical equipment

4.單項選擇題Which statement is TRUE concerning spare charges for portable fire extinguishers on unmanned tank barges?（）.

A.Spare charges shall be carried for at least 50 percent of each size and variety required on board
B.If the unit cannot be charged by the vessel's personnel，one spare unit shall be carried in lieu of spare charges
C.Spare charges shall be stowed in watertight containers on deck
D.Regulations concerning spare charges do not apply to unmanned barges

5.單項選擇題A cabinet or space containing the controls or valves for the fixed firefighting system must be（）.

A.posted with instructions on the operation of the system
B.ventilated and equipped with explosion-proof switches
C.painted with red and black diagonal stripes
D.equipped with a battery powered source of emergency lighting