Employment laws vary from state to state and country to country. You'll have to specify the jurisdiction to find out if there are any laws that would apply there.
You are not legally required to know your social security number, however, there are many situations in which you will need to know it; you cannot apply for a job or open a bank account without a social security number.
8 hours in the UK...
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A security guard’s working hours depend on local labor laws, but typically a full-time guard works up to 40–48 hours per week. Any hours beyond the standard workweek must usually be paid as overtime, and safety regulations often require rest breaks between shifts to prevent fatigue. It’s important to follow these rules to ensure both legal compliance and the well-being of our staff.
In the United States, employers can legally require employees to work up to 40 hours per week, with additional hours considered overtime and subject to specific regulations.
The answer will depend on where in the world and whether you are talking about legally permitted hours or the reality.
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Working long hours and hard doesn't make you insane.
No not as such. However many of them are not legally sold without the prescription of a doctor
4, without a kennel license
you can survive 168 hours without water, aka: 7 days
(in the US) Usually not more than 24 hours - or in the case of jurisdictions not having 24 hour court - until the next regularly scehduled session of court.