It really depends on which food we are talking about.
For about one day.
About a day unles there is chicken or seafood in it then dot go past half a day starting with the food being cool.
Any prepared foodstuffs should be brought out of the danger zone of 41 to 140 degrees as soon as is possible to avoid bacterial contamination. Cool it, wrap it and get it into the fridge or freezer right away, please.
It depends what's in the quiche. Vegetarians who eat eggs will eat quiche as long as it contains no meat and any cheese included is vegetarian. However, quiche is made using eggs, and some vegetarians do not eat eggs. Most vegetarians who eat eggs only eat free range.
Presumably yes. But you can die (or get food poisoning from) food which has been too long in a refrigerator. Technically refrigeration is simply keeping food in a cool place, rather than just a fridge, so it has been going for some time.
It can probably last about 1 week without refrigeration.
A pound cake needs to cool to room temperature before adding glaze.
2 days
Once chopped, not for very long and they do require refrigeration. Use them within a few days.
Chicken spoils quickly and should be cooked within 1 to 2 days of refrigeration.
It depends on the type of quiche. If it contains any form of dairy it can be kept unrefrigerated for up to two days, however you should keep it covered.