Is it true or false that in the northern hemisphere surface currents curve to the left?

The large ocean currents in the Northern Hemisphere tend to curve to the right.as you travel with the current. This is subject to considerable local variation (the Alaskan Current and the Norwegian Current both curve left, for example), so you can't be certain that at any particular point it will be true... but if you had to make a guess, "to the right" is more likely to be correct.