更多"When using carbon dioxide to fight "的相关试题:
[单项选择]When used to fight fire，carbon dioxide（）.
A. is effective if used promptly on an oil fire
B. has a greater cooling effect than water
C. is lighter than air
D. is harmless to cargo and crew
[单项选择]Carbon dioxide as a fire fighting agent has which advantage over other agents? （）
A. It causes minimal damage
B. It is safer for personnel
C. It is cheaper
D. It is most effective on a per unit basis
[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]A squeeze-grip type carbon dioxide portable fire extinguisher has been partially discharged. It should be（）.
A. replaced in its proper location if weight loss is no more than 15%
B. replaced in its proper location if weight loss is no more than 25%
C. labeled empty and recharged as soon as possible
D. labeled empty and replaced in its proper location regardless of weight
[单项选择]When water is used to fight a fire on board a ship，the effect of the weight of the water must be taken into account. How much sea water will increase the weight displacement by one ton?（）
A. 64 cubic feet
B. 35 cubic feet
C. 100 gallons
D. 500 liters
[单项选择]The discharge from a carbon dioxide fire extinguisher should be directed（）.
A. at the base of the flames
B. at the center of the flames
C. to the lee side of the flames
D. over the tops of the flames
[单项选择]A carbon dioxide fire extinguisher should be recharged（）.
A. at least annually
B. whenever it is below its required weight
C. only if the extinguisher has been used
D. before every safety inspection
[单项选择]A carbon dioxide fire extinguisher has been partially discharged, and should be immediately （）.
A. tagged and restowed properly in its rack
B. weighed and the charge loss recorded
C. given to the chief engineer for recharging
D. tagged "empty" and stowed separately from charged extinguishers
[单项选择]The danger associated with using carbon dioxide in an enclosed space is（）.
A. frostbite
B. skin burns
C. asphyxiation
D. an explosive reaction
[单项选择]One of the disadvantages of using carbon dioxide to extinguish a fire in an enclosed space is （）.
A. the "snow" which is sometimes discharged along with the gas is toxic
B. prolonged exposure to high concentrations of C02 gas causes suffocation
C. rapid dissipation of the C02 vapor
D. the C02 gas is lighter than air and a large amount is required to extinguisha fire near the deck
[单项选择]What is an advantage of using foam in fire fighting?（）
A. It is MOST effective on very hot oil fires where the temperatures of the liquid exceed 100°C (212°F)
B. Most foams can be used with dry chemicals to attack a fire by two methods
C. Foam is effective on combustible metal fires
D. Foam can be made with seawater or fresh water
[单项选择]When fire pumps are used for other than firefighting service，each pipe connecting the other service (except for branch lines used for deck washing) must have a（）.
A. check valve installed in the line
B. shut off valve at a manifold near the pump
C. quick disconnect union within ten feet of the pump
D. regulator in the line set at 125 psi
