更多"An advantage of an ABC dry chemical"的相关试题:
[单项选择]An advantage of an ABC dry chemical over a carbon dioxide extinguisher is（）.
A. lack of toxicity
B. the multipurpose extinguishing ability
C. burn-back protection
D. cooling ability
[单项选择]An advantage of a dry chemical over a carbon dioxide fire extinguish is its（）.
A. greater range
B. effective on all types of fires
C. cleanliness
D. All of the above
[单项选择]As compared to carbon dioxide，dry chemical has which advantage?（）
A. Cleaner
B. Effective on metal fires
C. Greater range
D. More cooling effect
[单项选择]An ABC dry chemical fire extinguisher would be LEAST effective against a fire in（）.
A. a mattress
B. spilled liquids such as oil or paint
C. high voltage electrical gear
D. a trash can
[单项选择]An ABC dry chemical fire extinguisher would be least effective against a fire in（）.
A. a mattress
B. spilled liquids such as oil or paint
C. high voltage electrical gear
D. a trash can
[单项选择]An “ABC” dry chemical fire extinguisher would be LEAST effective against a fire in（）.
A. a mattress
B. spilled liquids such as oil or paint
C. high voltage electrical gear
D. a trash can
[单项选择]Oceangoing dry bulk cargo vessels over 1000 GT must have approved combination-type fire nozzles at all（）.
A. fire stations aboard the vessel，except for those in open deck areas weatherdeck and cargo hold fire stations
B. interior fire stations
C. engine room fire stations
D. all of the above
[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]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]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]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]The danger associated with using carbon dioxide in an enclosed space is（）.
A. frostbite
B. skin burns
C. asphyxiation
D. an explosive reaction
