更多"A fire hose has a（）."的相关试题:
[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]Fire hose couplings（）.
A. are made of bronze，brass，or soft alloy metals
B. should be painted red in order to identify hose lengths
C. are specially hardened to prevent crushing
D. should be greased frequently
[单项选择]When joining the female coupling of the fire hose to the male outlet of the hydrant，you should make sure that the（）.
A. threads are lubricated
B. nozzle is attached to the hose
C. female coupling has a gasket
D. hose is led out
[单项选择]Fire hose should be washed with（）.
A. salt water and a wire brush
B. caustic soap
C. mild soap and fresh water
D. a holystone
[单项选择]To remedy a leaking fire hose connection at the hydrant，secure the valve and（）.
A. replace the gasket in the male coupling
B. reduce fire pump pressure
C. replace the gasket in the female coupling
D. rethread the male coupling
[单项选择]Each fire hose coupling on a ship must have threads that meet the specifications of the（）.
A. American Petroleum Institute
B. National Standard Fire hose Coupling
C. American Society of Mechanical Engineers
D. Underwriter's Laboratories，Inc
[单项选择]A fire hose with a nozzle attached must be connected to each hydrant except when exposed to heavy weather or when the（）.
A. fire hose might be damaged by cargo operations
B. vessel is in port
C. fire-main system is not charged
D. fire pumps are used for purposes other than supplying water to the fire main
[单项选择]The canvas covering of fire hose is called the（）.
A. casing
B. outer hose
C. line cover
D. jacket
[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]Which fire extinguishing agent has the greatest capacity for absorbing heat?（）
A. Water
B. Foam
C. Dry chemical
D. Carbon Dioxide
[单项选择]Which fire fighting agent has the greatest capacity for absorbing heat?（）
A. water
B. dry chemical
C. foam
D. CO2
[单项选择]When fighting a fire in an enclosed space，the hose team should crouch as low as possible to（）.
A. protect themselves from smoke
B. obtain the best available air
C. allow the heat and steam to pass overhead
D. All of the above
[单项选择]After a fire has been extinguished in a closed space, personnel may safely enter the space when （）.
A. smoke density has been decreased sufficiently to see the bulkhead opposite the compartments entrance
B. a lifeline and explosion proof flash light are used
C. all smoke and toxic fumes are removed and an adequate oxygen supply is present
D. overhaul has been completed to remove any possible source of re-ignition
[单项选择]When an oil fire has been extinguished, the surface of the oil should be kept covered with foam to prevent （）.
A. air from contacting the oil vapors
B. permitting re-ignition boiling of the heated oil
C. spontaneous combustion below the oil surface
D. toxic fumes from escaping to the surface
[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
