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40—1 下文是有关各种气瓶和气体用具的叙述,请在文中正确的项号上划个○,在错误的项号上打个×。 (1)氩气瓶的颜色是红色。 (2)CO_2气瓶的颜色是深灰色。 (3)气焊鲜毛气时,氧和乙炔气的软管必须要分色(以彩色区别)。 (4)因为Co_2气体是不燃气体,故当CO_2气瓶中的气体放出困难时,只要用煤气燃烧器把气瓶加热就可以。 (5)高压气体压力调整器的安全阀,自己调整是危险的。 40—2 在进行手工电弧焊接作业时,从安全卫生方面考虑,请列举5种所使用的保护
40-1 The following is a description of the various types of gas cylinders and gas appliances. Please mark the correct item number in the text, and mark the wrong item number. (1) The color of argon bottle is red. (2) The color of the CO2 cylinder is dark gray. (3) gas welding fresh gas, oxygen and acetylene gas hose must be color separation (in color). (4) Since Co 2 gas is non-combustible gas, when the gas in the CO 2 gas cylinder is released, it is sufficient to heat the gas cylinder with a gas burner. (5) high-pressure gas pressure regulator safety valve, adjust themselves is dangerous. 40-2 In the manual arc welding operation, from the safety and health aspects, please list 5 kinds of protection used