A: General Engine Diagnosis; Tasks 1-9 Questions And Answers 2024/2025

A: General Engine Diagnosis; Tasks 1-9 Questions And Answers 2024/2025 1. While discurssing a basic diagnostic procedure, Technician A says that the most complicated diagnostic tests should be performed first. Technician B says that the customer complaint must be identified. Who is correct? A. A only - B. B only - C. Both - D. Neither - ANS-B - The easiest, quickest test should be performed first. The customer complaint must be identified during a basic diagnostic procedure. 2. A throttle body injected engine has a no-start complaint, and no fuel is discharged from the injectors when the engine is cranking. Technician A says to check the voltage supply to the fuel pump. Technician B says to check the fuel filter for a partial restriction. Who is correct? A. A only - B. B only - C. Both - D. Neither - ANS-A - Technician B is incorrect because with a partially restricted fuel filter, some fuel is still discharged from the injectors. Technician A is correct because if there is no voltage supplied to the fuel pump, the fuel pressure is zero, and no fuel is discharged from the injectors. 3. A cooling system is pressurized with a pressure tester to locate a coolant leak. After 15 minutes, the tester gauge has dropped from 15 psi to 5 psi, and there are no visible signs of coolant leaks in the engine compartment. Technician A says that the engine may have a leaking head fasket. Technician B says that the heater core may be leaking. Who is correct?...