The McDonald's logo is a very simple, yet iconic logo design. It is known that the color red affects the brains appetite. The golden arches are creating the letter 'M' which obviously stands for "McDonald's"

The Hot Wheels logo uses flames to reflect the name "Hot Wheels". The way the text is organized helps to show movement and speed,  which are to qualities there products represent 

Noodles and Company took a more direct approach and clearly display noodles and a spoon on there logo. Notice, this restaurant company also incorporated the color red, which can mentally make one think they are hungry and increase their appetite

Domino's also took a literal approach to their logo by incorporating an actual domino in their design. Text is laid out simply and easy to read for their customers. And, once again, there is the inclusion of the color red.

The Fedex logo is quite simple, to the ordinary eye. They tried to be subtle with there representation of what their company does, which is deliver packages. If you look closely, you'll notice between the 'E' and the 'X' there is the illusion of an arrow. This was no accident, this shows there is movement, as in "moving" things from one place to another, or delivery.