In chess can a knight check mate a King?

Hell yes, even a Pawn can take a king, if it survived that long.

King & Knight v.s. King is a draw.

In most cases you can have two knight and not be able to force a win. The lone king can always triangulate to get around a two knight mate. If there are pawns this may change in very rare cases.

Read the reference below for more information.

I have been a USCF TD for over 40 years.

When you are left with your king and a knight you do not have enough mating material to make this possible. Any chess book will tell you this and it's hard to believe until you keep trying it. The game can end with a stalemate at best.

Yes,it's possible.The knight should threaten the enemy King,the last one must not have any square to go because the other enemy pieces block the specific squares their King can go and of course,the Knight can not be captured.Also,it can be done in an endgame with King and 2 Knights vs King and another piece that can move.To achieve checkmate here,the enemy king must be in one of the 4 corner squares(a1,a8,h1 or h8) and the opponent must move the piece(for example,a pawn so it get's promoted) and not his King.By certain moves,the player with the 2 Knights can win-if there's only the enemy King left it's a draw

yes but it needs to be protected just like any other piece that checkmates a king except the king

one example is the popular knight and queen checkmates a king

another example is two knights and a bishop are used in the mate known as Legal's mate if the opponent plays poorly

A knight can place a king in check, but to accomplish check mate other pieces must be in position to prevent the king from simply moving out - so it cannot mate on its own.

The only piece that cannot check mate the King is the other King.

Any piece can check-mate a King, as long as the king is stuck where he is. Even a pawn could potentially do this.

Yes, even a pawn can potentially check mate a king (but I dont think I've ever seen it happen)

Yes

Try this position:

K on h8, R on g8, pawns on g7 and h7. An enemy knight on f7 is delivering checkmate.

However if you are referring to only a K v only a K & N in any position on the board, then the position is drawn - it is impossible to deliver mate.