You can check this easily enough. Back the chain adjustment off one side (1/6 turn), give the wheel a good kick to move it forward, tighten up the axle nut and go for a ride.
The chain should be adjusted at its tightest point, otherwise it it possible to damage the axle and transmission bearings.

Let's hope there's intelligent life somewhere in space 'cause it's buggar all down here. -- Monte Python