'CALLED AS...' or 'CALLED...'

Hi Friends,
Sorry again. I couldn't blog for a couple of days as I was pretty down with a flu.


It is very common among many speakers in non-English speaking countries to use the word combination 'called as', for example, in India, I've heard many teachers telling their students:

"This is called as protractor".
"This phenomenon is called as metamorphosis" etc.

Both the sentences or any other sentence of this kind are considered wrong in standard British or American English.

So, how can these sentences be written?
"This is called a protractor". (correct)
"This phenomenon is called metamorphosis" (correct)

More examples:
This festival is called Diwali. (called as)
This building is called Golden Temple. (called as)
A machine for separating things is called a separator. (called as)