Which item is NOT included in the fireman’s outfit on a cargo vessel?（）

单项选择题Which is a disadvantage of Halon as a fire extinguishing medium?（）

A.Conducts electricity
B.Difficult to store
C.Large volume necessary to be effective
D.Ineffective in powdered metal fires

单项选择题Which firefighting method is an example of an indirect attack on a fire?（）.

A.Bouncing a straight stream of water off the overhead to create spray effect
B.Spraying foam on a bulkhead and letting it flow down and over a pool of burning oil
C.Flooding a paint locker with CO₂ and sealing the compartment
D.Cooling adjacent bulkheads with water to prevent the spread of the fire by conduction

单项选择题Which fire extinguishing agent has the greatest capacity for absorbing heat?（）

A.Water
B.Foam
C.Dry chemical
D.Carbon Dioxide

单项选择题Which fire extinguishing agent can NOT be used on an ethylenediamine?（）

A.Water foam
B.Dry chemical powder
C.Water fog
D.Alcohol foam

单项选择题Which fire detection system is actuated by sensing a heat rise in a compartment?（）

A.Manual fire detection system
B.Automatic fire detection system
C.Smoke detection system
D.Watchman's supervisory system