If a boiler has been laid up dry for an extended period, it will be unsafe to enter the steam and water drum immediately after it has been opened, as there may be __________.
A
insufficient oxygen to support life
B
a heavy concentration of sewer gas
C
excessive carbon dioxide in the drum
D
toxic gases from organic decomposition
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Question 1 / 205eccef9ebacbc34ba4d4658f
Question 1 of 205eccef9ebacbc34ba4d4658f
If a boiler has been laid up dry for an extended period, it will be unsafe to enter the steam and water drum immediately after it has been opened, as there may be __________.
If a boiler has been laid up dry for an extended period, it will be unsafe to enter the steam and water drum immediately after it has been opened, as there may be __________.