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单选题
For H2S detection,sensitized tapes indicate H2S presence by means of discoloration of an exposed spot on the tape. The shade of the color on the spot depends upon the concentration of H2S and().
A
air temperature at the time of the exposure
B
air pressure at the time of the exposure
C
humidity at the time of exposure
D
duration of the exposure
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更多 “单选题For H2S detection,sensitized tapes indicate H2S presence by means of discoloration of an exposed spot on the tape. The shade of the color on the spot depends upon the concentration of H2S and().A air temperature at the time of the exposureB air pressure at the time of the exposureC humidity at the time of exposureD duration of the exposure” 相关考题
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引起乙炔气自燃爆炸的硫化物、磷化物的极限含量是()。
A、H2S≤0.08%P3H≤0.15%B、H2S≤0.008%P3H≤0.015%C、H2S≤0.15%P3H≤0.08%D、H2S≤0.20%P3H≤0.08%
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Individuals who have consumed alcohol within 24 hours of exposure to H2S can tolerate ______.A.unusually large concentrations of H2SB.smaller than normal concentrations of H2SC.moderate concentrations of H2S without the usual reactionsD.longer exposure to H2S concentrations
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When H2S is burned(flared)on a ship,what can you expect to occur ________.A.All of the H2S will be converted to SO2B.All of the H2S will be converted to hydrogen and free sulfurC.Only 80% of the H2S will be converted to SO2 or free sulfurD.The H2S not converted will not be dangerous
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净化水回用的质量控制指标是()。A、含H2S≤50mg/l、NH3≤150mg/lB、含H2S≤20mg/l、NH3≤50mg/lC、含H2S≤100mg/l、NH3≤200mg/lD、含H2S≤10mg/l、NH3≤50mg/l
考题
硫化氢对金属材料的腐蚀,()是正确的。A、在常温常压下干燥的H2S对金属材料无腐蚀破坏作用B、钢材在湿H2S环境中才易引发腐蚀破坏C、钢材在湿H2S环境中不易引发腐蚀破坏D、在湿H2S环境中加速非金属材料的老化E、干燥H2S环境中加速非金属材料的老化
考题
以下关于H2S气体作用的相关描述,不正确的是()。A、H2S气体进料仅对烟囱对大气排放过程中的硫损失进行补偿B、H2S气体进料可以代替废酸产出新酸,没有特别注意事项C、H2S气体占总进料负荷的20%时的操作与正常操作非常类似D、H2S气体在饱和温度下收入装置时电伴热要处于正常工作状态,防止出现冷凝
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如果输入气中H2S含量超标,在进入压缩机前必须对其进行脱除,其目的是()A、H2S为剧毒气体,防止因天然气泄漏伤人B、H2S为易燃易爆气体C、防止H2S腐蚀设备及管线D、进一步净化气源
考题
单选题在三糖铁琼脂培养基、氰化钾(KCN)和尿素琼脂培养基上,大肠埃希菌的反应为( )。A
斜面(+/-)、底层(+)、H2S(-)、KCN(-)、尿素酶(-)B
斜面(-)、底层(+)、H2S(+)、KCN(+)、尿素酶(+)C
斜面(+)、底层(+)、H2S(+)、KCN(-)、尿素酶(+)D
斜面(+/-)、底层(+)、H2S(-)、KCN(+)、尿素酶(+)E
斜面(+/-)、底层(+)、H2S(-)、KCN(+)、尿素酶(-)
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单选题致泻性大肠埃希菌在三糖铁培养基上()。A
斜面产酸或不产酸,底层产酸,H2S阴性B
斜面不产酸,底层产酸产气,H2S阳性C
斜面不产酸,底层产酸,H2S阴性D
斜面产酸,底层产酸,H2S阳性E
斜面产酸,底层不产酸,H2S阴性
考题
单选题志贺菌在三糖铁培养基上()。A
斜面产酸或不产酸,底层产酸,H2S阴性B
斜面不产酸,底层产酸产气,H2S阳性C
斜面不产酸,底层产酸,H2S阴性D
斜面产酸,底层产酸,H2S阳性E
斜面产酸,底层不产酸,H2S阴性
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