A.Signaling that all personnel are clear before lifting or lowering material
B.Examining material for sharp edges or protruding points before handling
C.Closing, tagging or securing valves that permit entrance of steam, water, or air into a fitting or other equipment
D.Throwing materials from high places to the deck
第1题
A.Class 'A'
B.Class 'B'
C.Class 'C'
D.Class 'D'
第2题
A.convection
B.conduction
C.radiation
D.direct contact
第3题
A.when the remaining charge volume is less than 90 percent of the required volume
B.at each inspection for certification
C.at each annual inspection
D.when the weight loss exceeds 10% of weight of charge
第4题
A.Make an entry in the official logbook
B.Open the master control valves on the fixed CO2 system
C.Start the fire pump and check discharge pressure
D.Secure auxiliary condenser overboard discharge
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