When a nozzle tester is being used to test a "closed" type fuel injection nozzle, a clogged nozzle orifice will be indicated by a __________.

Correct Answer: Option A — distorted spray pattern

When testing closed-type fuel injection nozzles using a manual test stand, carbon buildup or obstructions in one or more spray orifices restrict fluid egress, resulting in an asymmetrical and visibly distorted spray pattern rather than a clean atomized mist.