A large oil fire on the deck of a ship can be fought most effectively with（）.

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 . stop valves B . non-return valves C . quick closing valves D . relief valve

A . The diesel oil must never be allowed to mix with the heavy fuel B . The temperature of the fuel from the pre–heater should be gradually reduced after switching over the three–way valve C . The heating steam to the pre-heater should be secured as soon as the diesel fuel passes through the three-way valve D . The heating steam must be secured before the diesel oil passes through the three-way valve

A . secure all openings to the tank B . discharge an initial charge of CO with a hand portable extinguisher C . direct a fire hose into the tank and energize the fire main D . spray the tank boundaries with a fire hose to promote cooling

A . a 30 second on 30 second off alternating signal B . the continuous blast of the ships whistle for not less than 10 seconds supplemented by the continuous ringing of the general alarm bells for not less than 10 seconds C . an intermittent ringing of the general alarm for not less than ten seconds D . announced over the PA system

A . in the event of a flame failure B . in the event of a stack fire C . when the water level reach the crown sheet D . when the feed pump discharge pressure drops to a preset minimum

A . apply straw or sawdust on the oil B . contain the spread of the oil C . throw grains of sand into the oil D . have the vessel move out of the spill area

A . soda acid B . foam C . CO D . sand

A . An adjacent storeroom，containing spare parts B . A storeroom directly above，containing combustible fluids C . An adjacent storeroom，containing mattresses and linen D . An adjacent storeroom，marked "Stewards Stores&quot

A . evacuate all engine room personnel B . fight the fire with hand portable extinguishers C . activate the main CO bank D . stop the flow of leaking fuel oil

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 . on a tug standing by B . available by contract with the shore facility C . kept at the shoreside hose connection during transfer D . kept in a protected shoreside location readily accessible

A . persons in the space wear gas masks B . persons in the space wear damp cloths over their mouths and nostrils C . ventilation system is secured and all persons leave the space D . ventilation system is kept operating

A . pilot valve opening B . compensating needle valve C . compensating spring tension D . accumulator spring tensio

A . secure the electric supply B . ventilate area to remove smoke C . start the fire pump and lead out hose D . apply foam

A . Class A B . Class B C . Class C D . Class D

A . water B . foam C . the range hood extinguishing system D . fire damper

A . piston rod guides B . engine thrust bearing C . crosshead bearing D . main shaft flexible coupling

A . at each alarm bell B . at each alarm actuator C . near all exits D . on the station bill

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

A . （1） B . （1）and（2） C . （2） D . neither（1）nor（2）

A．annoyed. B．ecstatic. C．surprised. D．gloomy.

A.(1) B.(1) and (2) C.(2) D.neither (1) nor (2)