The most important distinction is not which is correct per se — @PeterL, a “dust jacket” generally refers to something different from a “book cover” — but this is beside the point.

What matters is whether it is comprehensible by English speakers. “Key holder” could be strange in some situations where “key chain” is more natural, but no one would have trouble understanding it.

On the other hand, “consent” (at least in the U.S.–I can’t speak for other English-speaking countries) would never be understood to mean “electrical outlet” and “viking” would never be understood as “all-you-can-eat buffet”. But “man-to-man”? Sure, why not? Even “nighter” or “top batter” seem to make perfect sense as long as you’re talking about baseball to begin with.

Basically, the survey creator would benefit from having a native English speaker involved in writing a survey like this. There are plenty of examples of Wasei-Eigo out there to draw from. And some can be figured out by English speakers and others can’t. It’s definitely a hangup of Japanese learners of English to think there’s *one right answer* to any question about English which is very far from the truth.

Next up, a multiple choice test for English speakers (who haven’t studied Japanese) to find out how easy it is to guess the meaning of Wasei-Eigo.