单项选择题
A.hydrocarbon gas B.carbon monoxide gas C.carbon dioxide gas D.freon gas
Personnel boarding a davit-launched liferaft from a shi...
单项选择题Personnel boarding a davit-launched liferaft from a ship should be checked to assure they are not in possession of or wearing（）.
A.oil stained shoes or clothing B.sharp objects that may puncture or damage the liferaft C.matches or cigarette lighters D.drugs or paraphernalia not approved by a medical doctor
On inflatable liferafts，the operating cord should be re...
单项选择题On inflatable liferafts，the operating cord should be renewed by（）.
A.cutting the old line off and renewing same B.an approved servicing facility ashore C.opening the case and replacing the entire line D.one of the ship's officers
Inflatable liferafts shall be serviced at an approved s...
单项选择题Inflatable liferafts shall be serviced at an approved servicing facility every 12 months or not later than the next vessel inspection for certification. However，the total elapsed time between servicing cannot exceed（）.
A.12 months B.15 months C.17 months D.18 months
