It is common for the concept of "quiz" to just be fingerspelled,
"Q-U-I-Z."
However, quite a few people use a version of the sign for "test" to
mean "quiz."See: TEST
QUIZ (fingerspelled version)
You can learn
American Sign Language (ASL) online at American Sign Language University ™
ASL resources by Lifeprint.com © Dr. William Vicars