更多"Which extinguishing agent is best f"的相关试题:
[单项选择]Which extinguishing agent is the best for use on electrical fires?（）
A. Foam
B. CO2
C. Dry chemical
D. Water fog
[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]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]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 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]Which extinguishing agent is most effective on a mattress fire?（）
A. CO2
B. Foam
C. Dry Chemical
D. Water
[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 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 of the listed extinguishing agents is NOT suitable for fighting a liquid paint fire?（）
A. Dry chemical
B. Foam
C. Water
D. Carbon dioxide
[单项选择]Which of the fire extinguishing agents listed is the safest to use when combating a class C fire?（）
A. CO2
B. Foam
C. Water fog
D. Soda acid
[单项选择]The best tool to use for removing the carbon ridge at the top of an enginecylinder, prior to removing the piston, is to use（）
A. an electric grinder
B. a metal scraper
C. a reamer
D. a three-wing hone
[单项选择]A vessel is heading magnetic northwest and its magnetic compass indicates a heading of 312°. What action should be taken to remove this error during compass adjustment? （）
A. If the quadrantal spheres are all the way out，replace them with smaller spheres
B. If the quadrantal spheres are all the way in，replace them with larger spheres
C. If the quadrantal spheres are all of the way out，move the spheres in
D. If the quadrantal spheres are all the way out，replace them with larger spheres.
[单项选择]The greatest directive force is exerted on the magnetic compass when the（）.
A. needles are nearly in line with the meridian
B. vessel is near the magnetic poles
C. variation is near zero
D. vessel is near the magnetic equator
[单项选择]Lines on a chart which connect points of equal magnetic variation are called （）.
A. magnetic latitudes
B. magnetic declinations
C. dip
D. isogonic lines
[单项选择]The preferred agent used in fighting a helicopter crash fire is（）.
A. CO2
B. dry chemical
C. water
D. foam
[单项选择]Which fire fighting agent has the greatest capacity for absorbing heat?（）
A. water
B. dry chemical
C. foam
D. CO2
