ASE A8 Practice Test Questions and Answers 100% Correct

The opening temperature - ANSWER-A thermostat is rated at 195°F. This means: a. The opening temperature b. The fully open temperature c. The temperature in the radiator before the thermostat opens d. The temperature that the cooling fan comes on Cause the vehicle to burn more gas than if he left it in gear. - ANSWER-Joe puts his car in neutral while coasting down a mile-long hill in Arizona. This will: a. Cause the vehicle to burn more gas than if he left it in gear. b. Cause the vehicle to run too cold. c. Prevent the torque converter from overheating. d. Trigger a P1270 DTC A Lean Exhaust - ANSWER-A spark plug suddenly fails and stops firing while the engine is at highway cruse. The ECM/PCM will instantly interpret this as: a. A Rich Exhaust b. A Lean Exhaust c. An Evaporative Leak d. A Quad driver failure Drive Lambda readings high - ANSWER-The header pipe has developed a crack/leak between the O2 sensor and the engine. This will likely: a. Drive Lambda readings low b. Lock Lambda at 1.0 c. Drive Lambda readings high d. Set a downstream O2 Code The O2 to show a rich mixture - ANSWER-An EGR valve suddenly sticks partially open when commanded closed. This will cause: a. The O2 to show a lean mixture b. The O2 to show a rich mixture c. Manifold vacuum to increase d. A P0401 code Hot and fast - ANSWER-A lean air/fuel mixture bums: a. Cold and fast b. Hot and fast c. Hot and slow d. Cold and slow