單項選擇題The rated operating time of a self-contained breathing device may be reduced in actual use because of().

A.pressure differences in the atmosphere
B.the length of the hose attached to the facepiece
C.the physical exertion of the person wearing the device
D.spaces containing poisonous vapors


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1.單項選擇題The radiotelephone urgency signal is().

A.mayday
B.pan pan
C.securite
D.seelonce feenee

2.單項選擇題The Muster List (“Station Bill”) shows each person’s lifeboat station,duties during abandonment,basic instructions,and().

A.all emergency signals
B.instructions for lowering the lifeboats
C.the time each weekly drill will be held
D.work schedule

3.單項選擇題The Master shall insure that the Emergency Position Indicating Radio beacon (EPIRB) is().

A.secured inside the wheelhouse
B.tested annually
C.tested monthly
D.secured in the emergency locker

4.單項選擇題The Emergency Position Indicating Radio beacon on a cargo vessel must be stowed().

A.in an inside passageway
B.in an approved bracket
C.so that it is accessible from the bridge of the vessel
D.so that it will float free if the vessel sinks

5.單項選擇題The deck water seal of the inert gas system().

A.cools the inert gas and prevents soot from entering the cargo tanks
B.acts as an emergency system shutdown when the inlet pressures exceed the safe working pressure in the hazardous zone
C.prevents the backflow of hydrocarbon gasses into nonhazardous areas
D.relieves sudden large overpressures in the system