If you say my name, I will no longer exist. What am I?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

The dirtier I get, the whiter I look. Who am I?

I am white when I am dirty, and black when I am clean. What am I?

What has many keys but can’t open a single lock?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

You knock a Table over in the library, and suddenly 20 eyes are looking at you.

It is an eleven letter word.
The first, second, third and fourth letters form a banquet's name.
The fifth, sixth and seventh letters form a car's name.
The eighth, ninth, tenth and eleventh letters form a mode of transport.

Can you identify what word it is?