Violation
A dental assistant places a 5x5-inch piece of aluminum foil vertically into the unsed solution of an ultrasonic cleaner to test the efficiency of the cleaning unut. What indicates effective functioning of the ultrasonic cleaner?
An even pebbling effect on the submerged surface of the foil
An even pebbling effect on the nonsubmerged surface of the foil
A 1-inch area without pebbling on the submerged surface of the foil
A 1/4-inch area without pebbling on the submerged surface of the foil