exam question

[eadd9]

I had a question on my exam that i wanted to see if i got it right here goes.

There is a single phase service with 240v between phase A and phase B there is 180v from phase A to ground and 70v from phase B to ground they wanted to know what was wrong i said it was missing a nuetral.

 

[Buck Parrish]

This is one of those scenarios that I tell people I would have to look at it . Before I could diagnose it.
But as a test question. I would say your answer was right on or close.
We're their any other choices?:

 

[cripple]

exam question

In this scenarios would seem that the system neutral was floating (not referenced grounded), and the system was severely unbalanced. The floating neutral condition can cause voltages to float to a maximum of 208 volts RMS relative to ground, subjecting loads to a sustained overvoltage condition. Even if one assumes light or balanced loading, the electrical distribution system may operate without any apparent side effects for quite some time. Should the loading become unbalanced or an electrical short occur, the phase voltages will fluctuate severely.