If a wheel has 54 spokes, how many spaces are there between the spokes?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

If an electric train is travelling south, then which way is the smoke going?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

What month of the year has 28 days?

Without looking at a calendar, within a minute name, a boy's name using 5 consecutive 1st letters of 5 consecutive months

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?