Ο υπεύθυνος ορόφου ελέγχει την πυροσβεστική φωλιά.

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Breakdown of Ο υπεύθυνος ορόφου ελέγχει την πυροσβεστική φωλιά.

• η πυροσβεστική φωλιά: the fire-hose cabinet
• ο υπεύθυνος ορόφου: the floor warden

Questions & Answers about Ο υπεύθυνος ορόφου ελέγχει την πυροσβεστική φωλιά.

What case is ορόφου, and why is it used here?

ορόφου is the genitive singular of όροφος (floor/storey).

Here it depends on υπεύθυνος and shows what area the person is responsible for. So:

• ο υπεύθυνος ορόφου = the floor supervisor / the person in charge of the floor

A very literal breakdown would be something like the responsible person of the floor, but English expresses this more naturally in other ways.

Also note the form change:

• όροφος → nominative
• ορόφου → genitive

Why is there no article before ορόφου?

Greek often omits the article in expressions that work almost like job titles or set labels.

So:

• ο υπεύθυνος ορόφου sounds like floor supervisor
• ο υπεύθυνος του ορόφου would sound more like the person in charge of the floor, with a more specific of the floor feeling

Both can exist, but the version without the article is very natural in administrative or professional wording.

What grammatical form is ελέγχει?