Answering off the top of my head. (In this group a good way to lose your head.) I think the answer for the test would be False. The taps are for voltage not angle of phase.
A transformer is rated with a fixed primary voltage which is not always available. that is 480 delivered by the utility may be 470 or 490 volts. If you want 240 on the secondary you would use the taps to get 240 volts. Make Sense ?
Alan--
Looking again I just repeated what Iwire said.
[This message has been edited by Alan Nadon (edited 09-06-2005).]
