单选题 Under certain test conditions, when the oil is cooled to a certain temperature, and the tube of oil storage is tilted 45° angles, and after 1 minute, the naked eye can not see the position of the liquid surface in the tube has moved, the highest temperature of this phenomenon is called the ( ) of the oil.
相关试题
单选题 High work means work performed above the fall height datum ( ) (inclusive), where there is a possibility of falling.
单选题 For ( ) (including) above high work, the "high work permit" should be applied.
单选题 When doing hot fire analysis, the interval between sampling and hot fire is more than ( ) minutes, or the stop time in the middle of hot work is more than ( ) minutes, you must resamb for analysis.
单选题 When the chemical equipment is hot repair, the medium that can not be directly used to replace the combustible gas is ( ).
单选题 A gas explosiometer measures the ( ) of combustible gases.
单选题 ( ) Does not fall under fall protection.
单选题 When the height of the high work is ( ) m, it is called the level 2 high work.
单选题 For hot operation in the no-fire zone, the distance between the oxygen cylinder and the acetylene cylinder is at least ( ) meters.
2024-11-15 
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