Question 423Motor Plants - Assistant Engineer

The correct answer is A) distorted spray pattern. When a nozzle tester is used to test a "closed" type fuel injection nozzle, a clogged nozzle orifice will be indicated by a distorted spray pattern. This is because a clogged orifice restricts the flow of fuel through the nozzle, resulting in an irregular or uneven spray pattern when the nozzle is actuated. The other answer choices are incorrect because they do not accurately describe the indication of a clogged nozzle orifice. A chattering sound (B), squealing sound (C), or popping sound (D) may be indicative of other issues with the fuel injection system, but they are not the primary symptom of a clogged nozzle orifice when using a nozzle tester.