In regards to the question about the CVOR and 030 - the difference between AM and FM is 30 degrees, but I think I'm right in saying that the phase difference to be measured is between FM and AM, not AM to FM.
AM to FM is 'backwards,' and given that the phase scanning is clockwise in a CVOR you'd have to go right round - i.e. 330 degrees.
In relation to the Gen Nav question, you are following great circle tracks. I assume you've learnt about earth convergence (sin mean lat) and conversion angle (1/2 sin mean lat).
You're in the northern hemisphere so your initial track to wpt 2 will be less than 90, and the final track more than 90. At wpt 2 your heading will decrease again to maintain another great circle. I imagine the answer will be D!