Not when used as a noun. "I showed her the point of contact of the meteorite."
Yes, when used as an adjectve, describing a noun. "The point-of-contact location was 15 feet from where I thought it was."
No, "point of contact" should not be hyphenated when used as a noun. It is a compound noun consisting of three separate words. Hyphenation is typically not necessary in this case, as the meaning is clear without it.
Yes, it should be hyphenated.
Yes it should be hyphenated.
Yes it should be hyphenated.
yes check-up should be hyphenated
Point of sale is a business term used to describe when the retail transaction is complete. The phrase "point of sale" is not hyphenated.
It should be hyphenated.
Yes it should be hyphenated.
"Field" is not hyphenated.
Yes it should be hyphenated.
Yes it should be hyphenated.
No it shouldn't be hyphenated.