Horse****.
Don't you dare go onto 121.5 asking for a training fix if you are in fact lost. Its dishonest and deceitful. It blocks the frequency for genuine emergencies and it makes hundreds of airliners withing 200nm turn down their monitoring of the 121.5 freq.
If I were your examiner or instructor I'd fail you as a result of your deceit AND let me tell you that I used to call London Centre on the telephone whilst my students were on short final after QXCountry of solo navex. They will tell you in the blink of an eye if your students aircraft has either used 121.5 OR is suspected of having been in airspace it shouldn't have.
Just don't do it.
I'd have all the respect in the world for a student who came in for debrief you said "actually I called 121.5 for being Lost then proceeded to destination". He'd pass and be commended.
If the student claimed he had no problems when I already knew he's used 121.5 or had bust some airspace then he'd be chopped, bollocked and made to refly the exercise.
Cheers
WWW