The alarm signal for engine room catching fire is a blast of random bell followed by____.

A．two knocks

B．three Blocks

C．four knocks

D．five knocks

[单选题]Engine protection by means of an alarm or shutdown control can be obtained with devices that are sensitive to （）.A . temperatureB . pressureC . engine speedD . all of the above

[单选题]With UMS, when the engine room is unwatched will control the main engineA．the bridge officer on watchB．the chief engineerC．the duty engineerD．the duty motorman

[单选题]The bridge should inform the engine room______before passing through congested or shallow waterway.A．24 hoursB．2 hoursC．1 hourD．15 minutes

[单选题]Why is it necessary to warn engine room personnel before activating the fixed CO2 system?A．To make them aware there is a fireB．To let them know they should leave the engine roomC．To prevent possible injury from frostbiteD．To make them aware that vent

[单选题]With UMS, when the engine room is unwatched （） will control the main engine.A . the bridge officer on watchB . the chief engineerC . the duty engineerD . the duty motorma

[单选题]A．ccidental flooding of the engine room bilges by the bilge main is prevented by( ).A．stop-check valves installed in the bilge suction manifoldsB．using a positive displacement reciprocating bilge pumpC．installing educators in all bilge rose boxesD．in

[单选题]While on watch in the engine room, you hear a continuous sounding of the general alarm. Which of the following actions should you take?A．Make an entry in the official logbookB．Open the master control valves on the fixed CO2 systemC．Start the fire pum

[单选题]A．ll engineer officers and engine room ratings shall be aware of the serious effects of operational or accidental pollution of the marine environment and shall take all possible ____ to prevent such pollution, particularly within the framework of rel

[单选题]I am on fire in Engine room 的中文意思是（）.A .我船机舱失火B .我船货舱失火C .我船厨房失火D .我船泵舱失火

[单选题]The mode of control employed by an alarm circuit is aA．two position controlB．single speed floating controlC．proportional speed floating controlD．reset control