Fire detecting systems on merchant ves

1、A cutoff valve in the fire-main system

A cutoff valve in the fire-main system of a ship may be closed to protect the portion of the system on an exposed deck from（）.Adamage from crane operationsBbeing used for wash down purposesCaccidental diversion of flow to wrong locationDfreezing

2、Which fire detection system is actuate

Which fire detection system is actuated by sensing a heat rise in a compartment?（）AManual fire detection systemBAutomatic fire detection systemCSmoke detection systemDWatchman's supervisory system

3、A fire main system must have enough fi

A fire main system must have enough fire hydrants so that each accessible space may be sprayed with（）.Aa low velocity spray applicatorBa water spray or solid streamCat least two spray patterns of waterDat least 25 psi delivered pressure

4、Each part of the fire-main system loca

Each part of the fire-main system located on an exposed deck must be（）.Aprotected against freezingBlocked to prevent theftCnumbered sequentiallyDpressurized at all time

5、Fire alarm system thermostats are actu

Fire alarm system thermostats are actuated by（）.Asmoke sensorsBthe difference in thermal expansion of two dissimilar metalsCpressure loss due to air being heatedDan electric eye which actuates when smoke interferes with the beam

6、In a crossing situation，a stand-on ves

In a crossing situation，a stand-on vessel which is forced to take action in order to avoid collision with a vessel on her own port side shall，if possible，avoid（）.Aturning to portBturning to starboardCdecreasing speedDincreasing speed