Technician A says that high pressure fuel can exit an injector nozzle at faster than the speed of sound. Technician B says that the most OEMs recommend electrohydraulic injectors (EHIs) to be field serviced using standard shop tools. Who is correct?
A) Technician A only
B) Technician B only
C) Both A and B
D) Neither A nor B

Question

Quizplus · Accepted Answer

Technician A is correct because high-pressure fuel can indeed exit an injector nozzle at speeds exceeding the speed of sound, especially in modern high-pressure fuel injection systems. Technician B is incorrect because most OEMs do not recommend field servicing electrohydraulic injectors (EHIs) with standard shop tools due to the precision and specialized equipment required for proper maintenance and repair.

Technician a Says That High Pressure Fuel Can Exit an Injector