單項選擇題

Which is the proper method of determining whether a portable CO₂ fire extinguisher needs recharging?（）

A.Check the tag to see when the extinguisher was last charged
B.Release a small amount of CO₂; if the CO₂ discharges，the extinguisher is acceptable
C.Weigh the extinguisher and compare the weight against that stamped on the valve
D.Recharge the extinguisher at least once each year

你可能感興趣的試題

單項選擇題

Which condition is necessary for a substance to burn?（）

A.The temperature of the substance must be equal to or above its fire point
B.The air must contain oxygen in sufficient quantity
C.The mixture of vapors with air must be within the explosive range
D.All of the above

單項選擇題

When retrieving the survival craft，the winch operator should stop the winch and check（）.

A.that all personnel are seated in the craft
B.that the cable has not jumped any grooves on the drum
C.which way the wind is blowing
D.the hydraulic fluid level before lifting

日韩欧美亚洲 _ 欧美亚洲一区 _ 日本亚洲欧美 _ 亚洲精品欧美 国产白袜脚足J棉袜在线观看_亚洲熟妇av一区二区三区_久久天天躁狠狠躁夜_精品众筹模特私拍在线

Which is the proper method of determining whether a portable CO2 fire extinguisher needs recharging?（）

你可能感興趣的試題

Which condition is necessary for a substance to burn?（）

When retrieving the survival craft，the winch operator should stop the winch and check（）.

日韩欧美亚洲 _ 欧美亚洲一区 _ 日本亚洲欧美 _ 亚洲精品欧美国产白袜脚足J棉袜在线观看_亚洲熟妇av一区二区三区_久久天天躁狠狠躁夜_精品众筹模特私拍在线

Which is the proper method of determining whether a portable CO₂ fire extinguisher needs recharging?（）

When retrieving the survival craft，the winch operator should stop the winch and check（）.