Questioner n. : One who asks questions; an inquirer.

Example:
is it fair that answers that are rated low become invisible to the Questioner?

Taxonomy
questioner, dictionary, Encyclopedia, kw, Synonyms, thesaurus browser, online dictionary, conducts, Translations, Free Online Dictionary, inquiry, doubt, antonyms, a witness, ques tion, m/f, English dictionary, Idioms.

Defination from the web:
questioner in the Online Dictionary. Meaning of questioner. Pronunciation of questioner. Translations of questioner. questioner synonyms, questioner antonyms. ... cross-examiner, cross-questioner - someone who questions a witness carefully (especially about testimony given earlier) ...