D。解析:Foam fire extinguisher is best for oil fires as it can form a blanket over the fire and cut off the oxygen supply. Water fire extinguisher is not suitable as oil floats on water and can spread the fire. Dry powder fire extinguisher can be used but foam is more effective. Carbon...
A. Fire extinguisher symbol. B. Warning sign. C. Information sign. 相关知识点: 试题来源: 解析 A。“Fire extinguisher symbol”是灭火器标志符号,用于指示灭火器的位置。“Warning sign”是警告标志,范围较广,不一定特指灭火器位置。“Information sign”是信息标志,不一定与灭火器位置有关。反馈...
A. Danger. B. Fire extinguisher. C. Caution, fire hazard. 相关知识点: 试题来源: 解析 C。“Caution, fire hazard”表示小心火灾危险,明确提醒人们注意防火。“Danger”只是危险,范围较广,不一定特指火灾危险。“Fire extinguisher”是灭火器标志,不是提醒小心火灾。反馈...
C。解析:Carbon dioxide fire extinguisher is suitable for electrical fires as it does not conduct electricity. Water fire extinguisher is not suitable as water conducts electricity and can cause electric shock. Dry powder fire extinguisher can be used for many types of fires but not the best for...
A. Point the nozzle at the fire source B. Swing the fire extinguisher randomly C. Pull out the safety pin first D. Squeeze the handle to spray 相关知识点: 试题来源: 解析 B。解析:随机挥舞灭火器不正确,A 把喷嘴对准火源正确,C 先拔出保险销正确,D 挤压把手喷射正确。反馈...
We should have a fire extinguisher at home.Which one is correct about using a fire extinguisher? A. Point it at the top of the fire. B. Point it at the bottom of the fire. C. Point it at the side of the fire. D. Point it randomly. ...
Fire extinguishers are important for fire safety. Which type of fire extinguisher is suitable for electrical fires? A. water extinguisher B. dry powder extinguisher C. carbon dioxide extinguisher D. foam E. xtinguisher 相关知识点: 试题来源: ...
致命故障的全部内容只是指危及人身安全，可能导致人身伤亡的故障。( )
Which of the following fire extinguisher is the best choice for fighting precision instrument fire? A.二氧化碳灭火器 Carbon dioxide fire extinguisherB.干粉灭火器 Dry powder fire extinguisherC.泡沫灭火器 Foam extinguisher 相关知识点: 试题来源: 解析 A 反馈 收藏 ...
When using a fire extinguisher,which direction should you aim at? A. Upwards. B. Downwards. C. At the base of the fire. D. In random directions. 相关知识点: 试题来源: 解析 C。使用灭火器时应瞄准火源底部。不能向上、向下或随意喷射。