Related Clues:

• Sound check
• Word after beta or acid
• Roil, as the waters
• Litmus ___
• Lab act
• It's often taken in silence
• Grade determiner, often
• Mike holder's opening, often
• __ paper
• Part of 16 Across
• Set of questions
• Occasion for a blue book
• Class grade factor
• Quiz or exam
• Part of SAT