No, you have to be a Category Supervisor in order to become a Senior Supervisor.
(See the Related question.)
Because, being a Supervisor whether it's floating or a category, or a senior Supervisor, it requires a lot of responsibility.
If a floating supervisor wishes to become a category supervisor, they can apply in the same way that a non-supervisor would, by sending an email to the appropriate email address.
Being a Senior Supervisor, in and of itself, does not give a volunteer supervisor any special capabilities.
You must be at least 15 years of age to become either a floating or a category supervisor.
A Senior Supervisor is not like a Senior Citizen where once a certain age, they are deemed into that category. A Senior Supervisor is a Super that has made many valuable contributions to WikiAnswers and has been around for a while on the site.
A Supervisor can become an Advanced Supervisor and get more tools, but they are not "higher" than regular Supervisors. They can also become a Senior Supervisor, but they don't get additional powers.
Although the word "senior" is in the title, there is no specific time requirement for becoming a Senior Supervisor on WikiAnswers. It is something that is given, rarely, in cases where a need exists and an extremely high level of trust has been established.
Well, it is mainly up to you, Don't forget, a Category Supervisor looks after certain categories, whereas a floating Supervisor maintains every category, just 'Floating'. Hence the name. So it depends whether you prefer just one category or not.
Yes, a floating supervisor can be a mentor.
Yes, a Senior Supervisor must be a Category Supervisor.(See the Related question.)
Perhaps Ganderton (Gregg), the guy who made you a Supervisor. And the people who recommended for you to become one.
Skullcandy88 is a senior supervisor.He is also an Advanced Supervisor and a Program Supervisor.