The test assesses the hearing in both ears

meteorologist

No.

"Assess" is a verb, so "assesses" is the third person singular form: "Bill assesses property," "She assesses property." The first and second person singular form, and the plural form, is "assess": "I assess property," "You assess property," "We assess property," "Don and Sheila assess property."

which U.S. Treasury bureau assesses and collects taxes on business and personal income

An assessor is a person who assesses something or someone.