MSC.1/Circ.1477 – Portable Atmosphere Testing Instruments for Enclosed Spaces – Set A

Source: MSC.1/Circular.1477 – Guidelines to facilitate the Selection of Portable Atmosphere Testing Instruments for Enclosed Spaces as required by SOLAS regulation XI-1/7 (approved 2014), circular and annex, paragraphs 1 to 18.
Reference: imorules.com – MSC.1/Circ.1477

Question 5 of 10

5. According to the Guidelines, the instrument concerned is the one used to test the atmosphere in an enclosed space:

A) Only immediately before entry B) Only after all work has been completed C) Before entry and at appropriate intervals thereafter until all work is completed D) At intervals not exceeding 10 hours while work is in progress

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