Occupational Health Daily Question 2.5: Participate for a prize; 3 correct answers earn an additional 10 points as a prize
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This post was last edited by slll611 on 2016-2-7 23:02. True or False: When entering a confined space for work, it is necessary to ensure that the concentration of combustible gases and oxygen levels in all areas inside the equipment are within acceptable limits, and that the concentration of any toxic or harmful substances is zero. (B is wrong; it is sufficient that the concentration of toxic and harmful substances does not exceed the **specified maximum allowable concentration of such substances in workshop air**, and it is not necessary for that concentration to be zero. ) A correct, B incorrect
B is wrong. It is sufficient that the concentration of toxic and harmful substances does not exceed the **specified maximum allowable concentration of such substances in workshop air**; it is not necessary for that concentration to be zero.
When entering a confined space for work, it is necessary to ensure that the concentration of combustible gases and the oxygen level in all areas inside the equipment are within acceptable limits, and that the concentration of any toxic or harmful substances is zero. (B) A is correct, B is wrong
When entering a confined space for work, it is necessary to ensure that the concentration of combustible gases and the oxygen level in all areas inside the equipment are within acceptable limits, and that the concentration of any toxic or harmful substances is zero. (B) A is correct, B is incorrect
When entering a confined space for work, it is necessary to ensure that the concentration of combustible gases and the oxygen level in all areas inside the equipment are within acceptable limits, and that the concentration of any toxic or harmful substances is zero. (A) A correct, B incorrect