Skip to content

SBE CRO

SBE Certified Radio Operator (CRO)

100 questionsEnglishFree practice

Start here

Take a five-question warm-up.

Get explanations as you go. Your progress saves in this browser.

Full question bank

Work through all 100 questions at your pace.

Open question bank

Focus your practice

Practice by topic

Transmitter Rf19 questions Audio Fundamentals17 questions Station Equipment17 questions Eas12 questions Fcc Rules Logs12 questions Electronics Basics8 questions Station Operation8 questions Safety7 questions