“A citizen is mechuyav to register with the draft.” (Weiser)

“The Menahel is mechuyav to provide a financial statement of the yeshiva to the major donors.” (Weiser)

“He felt he was mechuyav to volunteer to help his Rebbe build a Sukkah.” (Weiser)

“I can't look him in the eye until I'm no longer mechuyav so much money to him.” (Weiser)

"It’s our duty to seek to be mechuyav (obligated) in the Mitzvot since they are for our own good, even if we have all 'halachic' justification to abstain from them." (source)