更多"Portable CO2 fire extinguishers sho"的相关试题:
[单项选择]Portable carbon dioxide fire extinguishers should be sent ashore to be recharged ().
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
[单项选择]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
[单项选择]Which types of portable fire extinguishers are designed for use on electrical fires?()
A. Dry chemical and carbon dioxide
B. Foam (stored pressure) and soda-acid
C. Carbon dioxide and foam (stored pressure)
D. Dry chemical and soda-acid
[单项选择]All portable fire extinguishers must be capable of being().
A. carried by hand to a fire
B. carried or rolled to a fire
C. recharged in the field
D. used on class "B" fires
[单项选择]Portable foam type fire extinguishers are most effective on().
A. mattress fires
B. oil fires
C. wood fires
D. All of the above
[单项选择]Foam-type portable fire extinguishers are more usefull in combating fires involving().
A. solid materials such as wood or bales of fiber
B. inflammable liquids
C. electrical equipment
D. metallic solids
[单项选择]Foam-type portable fire extinguishers are most useful in combating fires involving().
A. solid materials such as wood or bales of fiber
B. inflammable liquids
C. electrical equipment
D. metallic solids
[单项选择]Which portable fire extinguisher should be used on a class C fire on board a vessel?()
A. Carbon dioxide
B. Water (stored pressure)
C. Foam
D. Carbon tetrachloride
[单项选择]After extinguishing a fire with CO2,it is advisable to().
A. use all CO2 available to cool the surrounding area
B. stand by with water or other agents
C. thoroughly ventilate the space of CO2
D. jettison all burning materials
[单项选择]Halon extinguishers used on a class C fire should be directed at the().
A. base of the equipment
B. top of the equipment
C. power source
D. source of the fire
[单项选择]All portable fine extinguishers must be capable of being().
A. carried by hand to a fire
B. carried or rolled to a fire
C. recharged in the field
D. used on class B fires
[单项选择]The soda-acid portable extinguishers must be discharged and refilled ().
A. every six months
B. every year
C. every one and half year
D. every two years
[单项选择]Which IPsec security protocol should be used when confidentiality is required?()
A. PSK
B. AH
C. MD5
D. ESP