As part of their explosive atmosphere risk assessment the factory manager

used their personal judgement and opinion to classify work areas into

hazardous zones. They quickly decided to classify the whole building as

Zone $1.$

$($a$)$ Explain why this may not be the correct decision. $(8)$

Note: Your answer must be based on the scenario only.

$($b$)$ What should the factory manager have considered when setting the zone

classifications? $(10)$

Note: You should support your answer, where applicable, using relevant

information from the scenario.

$($c$)$ Assuming other hazardous zones exist within the whole building, what

control measures should the factory manager consider within these

hazardous zones? $(12)$

Note: You should support your answer, where applicable, using relevant

information from the scenario