81-[3551]A fuel-air mixture below the lower explosive limit is too ______. A. rich to burn B. lean to burn C. cool to burn D. dense to burn KEY: B
82-[5827]Portable fire extinguishers must be provided for the cargo tank area of an unmanned tank barge ______.
A. only when fully loaded B. if one or more tanks are full C. when transferring cargo
D. only when the barge is being towed KEY: C
83 [1605]After a liferaft is launched，the operating cord ______. A. serves as a sea painter B. detaches automatically
C. is used to rig the boarding ladder
D. is cut immediately as it is of no further use KEY: A
84-[5870]In the first 24 hours after abandoning a vessel，water should be given only to personnel who are ______. A. thirsty
B. sick or injured C. wet D. awake KEY: B
85- What should you do with your emergency position indicating radio beacon if you are in a lifeboat during storm conditions?※
A. Bring it inside the liferaft and leave it on.
B. Bring it inside the liferaft and turn it off until the storm passes. C. Leave it outside the liferaft and leave it on. D. Leave it outside the liferaft and turn it off. 46期83题
86- 3594 You discover a leak in the fuel line to the engine. You should first ________. A. Activate the CO2 system—启动CO2灭火系统
B. Make a temporary repair with canvas or tape—用帆布或带子进行临时的修理 C. Start the bilge pump—开启舱底泵
D. Close the fuel valve at the tank--关闭油舱的燃油阀门
你发现通往机舱的燃油管路漏油，你首先应关闭油舱的燃油阀门。
87- [5012]A crew member is unconscious and the face is flushed. You should ______. A. lay the crew member down with the head and shoulders slightly raised B. administer a liquid stimulant
C. lay the crew member down with the head lower than the feet
D. attempt to stand the crew member upright to restore consciousness
KEY: A
88 [5009]A crew member has suffered frostbite to the toes of both feet. You should ______. A. immerse the feet in warm water B. warm the feet with a heat lamp C. warm the feet at room temperature D. rub the feet KEY: A