更多"Generally, the first action in exti"的相关试题:
[单项选择]Generally，the first action in extinguishing an LFG fire caused by escaping gas is to（）.
A. sweep flames away with water spray
B. shut off the leak
C. use a chemical foam fire extinguisher
D. call the local fire department
[单项选择]The fire extinguishing action of CO2 comes mostly from （）.
A. breaking the fire chemical chain reaction
B. smothering
C. cooling
D. isolating the heat from the fuel
[单项选择]Which extinguishing agent is effective in combating an isoprene fire?（）
A. Dry chemicals
B. CO2
C. Foam
D. All the above
[单项选择]An extinguishing agent which effectively cools，dilutes combustible vapors，removes oxygen，and provides a heat and smoke screen is（）.
A. carbon dioxide
B. Halon 1301
C. dry chemical
D. water fog
[单项选择]After extinguishing a paint locker fire using the fixed CO2 system，the next action is to have the space（）.
A. opened and burned material removed
B. left closed with vents off until all boundaries are cool
C. checked for oxygen content
D. doused with water to prevent reflash
[单项选择]Which extinguishing agent will cool down a heated bulkhead in the least amount of time?（）
A. Water stream
B. Water fog or apray
C. Steam
D. Dry chemical
[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 extinguishing agent is recommended in the Chemical Data Guide for use on a carbon disulfide fire?（）
A. Alcohol foam
B. Dry chemical
C. Chemical foam
D. Water fog
[单项选择]Which extinguishing agent is NOT recommended in the Chemical Data Guide for use on a cyclohexane fire?（）
A. Foam
B. Carbon dioxide
C. Dry chemical
D. Water fog
[单项选择]The remote control for a fixed fire extinguishing system should be（）.
A. painted red and labeled
B. concealed from the crew
C. protected by plexiglass
D. padlocked
[单项选择]Where foam extinguishing systems are provided on a ship，each machinery flat in the protected space must have a(n)（）.
A. coaming
B. alarm
C. drain
D. fire sensor
[单项选择]Water is a very effective fire extinguishing agent because it（）
A. will remove all the toxic fumes from the air
B. has the greatest cooling ability
C. will leave no harmful residue
D. completely removes combustible vapors from the air
[单项选择]A fixed carbon dioxide extinguishing system for a machinery space，designed WITHOUT a stop valve in the line leading to the protected space，is actuated by（）.
A. one control
B. two controls
C. three controls
D. none of the above
[单项选择]As an extinguishing agent，foam（）.
A. conducts electricity
B. should be directed at the base of the fire
C. is most effective on burning gases which are flowing
D. extinguishes by cooling oil fires below ignition temperature
[单项选择]One of the limitations of foam as an extinguishing agent is that foam（）.
A. cannot be made with salt water
B. is heavier than oil and sinks below its surface
C. is corrosive and a hazard to fire fighters
D. conducts electricity
[单项选择]A branch line valve of a fire extinguishing system on a ship must be marked with the（）.
A. maximum pressure allowed at that branch
B. name of the space or spaces which it serves
C. date of the last maintenance inspection
D. pressure needed to maintain an effective stream at that point
[单项选择]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]Which extinguishing agent is most effective on a mattress fire?（）
A. CO2
B. Foam
C. Dry Chemical
D. Water
