179. The hoods over galley ranges present what major hazard?

Grease collects in the duct and filter and if it catches fire is difficult to extinguish.
They concentrate the heat of cooking and may raise surrounding flammable material to the ignition point.
In order to effectively draw off cooking heat they present a head-injury hazard to a person of average or more height.
They inhibit the effective operation of firefighting systems in combating deep fat fryer or range fires.

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