Sound Audition uses the strength of "open-ended" audio questions. Multiple-choice questions would serve the answers on a silver platter. To really test what you hear, and then have the ability to describe what you hear. The open ended audition mimmicks what audio engineers go through when identifying what they hear — and making decisions on potential corrective action. The only way to truly test someones ear is by an open ended blind audition.
Some audio questions/examples have are considered "acceptable" — and have nothing wrong with them. An audio engineer must also know when a mix is acceptable. This is why some questions on the audition are considered "acceptable" and have been deamed "acceptable" by professional engineers in the audio field.
Play this listening audition on a good sound system and in a quiet environment. A higher end speaker/monitoring system or using quality headphones or in-ear monitoring is highly encouraged. Use of laptop speakers and/or low quality consumer grade headphones is not recommended.