In the fire main system, quick cleanin

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、The palace eaught fire three times in

The palace eaught fire three times in the last century , and little of the original buliding________now .A remains Bis remainedC is remaining D has been remained

3、In fighting a fire in a fuel tank, the

In fighting a fire in a fuel tank, the FIRST action you should attempt is to _____.Asecure all sources of fresh air to the tankBbegin transf...

4、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

5、In fighting a fire in a fuel tank, the

In fighting a fire in a fuel tank, the FIRST action you should attempt is to （）.Asecure all sources of fresh air to the tankBbegin transfe...

6、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