更多"When used to fight fire,carbon diox"的相关试题:
[单项选择]When using carbon dioxide to fight a fire on a bulkhead,the CO2 should be applied().
A. first to the bottom of the flaming area,sweeping from side to side,and following the flames upward
B. in a circular motion from the middle of the bulkhead outward
C. to the top of the flaming area,sweeping from side to side,and working toward the bottom
D. in an up-and-down motion from one side of the bulkhead to the other
[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]Carbon dioxide flooding system is used for extinguishing fires because it reduces the concentration of oxygen in the air to().
A. flashing point
B. combustion point
C. auto-ignition point
D. lower explosive limit
[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]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]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]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 supply of carbon dioxide used in the fixed extinguishing system aboard a cargo vessel MUST be at least sufficient for().
A. all the spaces of a vessel
B. all cargo spaces
C. the engine room and largest cargo space
D. the space requiring the largest amount
[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
[单项选择]When two fire hose teams are attacking a fire they should().
A. use different fire hose pressures
B. use fire hoses of different sizes
C. not attack the fire from opposite sides
D. not wear protective clothing
[单项选择]When a fire()at the National Exhibition, at least then priceless paintings were completely destroyed.
A. broke off
B. broke out
C. broke down
D. broke up
[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