ASE A8 Practice Test - ASE A8 Engine Performance Test Prep - Test 2 Practice Questions and Answers

ASE A8 Practice Test - ASE A8 Engine Performance Test Prep - Test 2 Practice Questions and Answers Technician B - Ans:-After performing a wet compression test, the pressure in each of the cylinders increased, but remained below specifications. Technician A says this is caused by incorrect valve timing. Technician B says this is caused by worn piston rings. Who is correct? A. Technician A B. Technician B C. Both A and B D. Neither A nor B A burned exhaust valve. - Ans:-A vacuum gauge is connected to a port on the intake manifold of an engine with poor performance. The needle on the gauge fluctuates between 15 "hg and 20 "hg vacuum at idle. This vacuum gauge reading indicates: A. A normal condition. ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 2/5 B. Late ignition or valve timing. C. A burned exhaust valve. D. A restricted exhaust. Neither A nor B - Ans:-Technician A says a stuck closed (EGR) exhaust gas recirculation valve will cause an engine to stumble or stall. Technician B says a stuck open EGR valve will cause detonation. Who is correct? A. Technician A B. Technician B C. Both A and B D. Neither A nor B A leaking fuel injector. - Ans:-A vehicle is emitting black smoke from its tailpipe at idle. Which of the following is causing this condition? A. A leaking fuel injector. B. Worn piston rings. C. A blown head gasket. ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 3/5 D. Leaking valve seals. A clogged catalytic converter. - Ans:-An engine suffers from a lack of power during acceleration. A. A clogged catalytic converter. B. Late valve timing. C. A faulty head gasket. D. Burned exhaust valve. Excessive resistance in this circuit will result in a lean air/fuel ratio. - Ans:-There is excessive resistance found at point A in the diagram to the right. All of the following statements are true about this circuit EXCEPT. A. Excessive resistance in this circuit will result in a lean air/fuel ratio. B. Excessive resistance in this circuit will result in delayed torque converter engagement. C. Excessive resistance in this circuit will result in delayed engine cooling fan operation. D. This is the ground connection for a (NTC) negative temperature coefficient sensor. An exhaust gas recirculation valve. (EGR) - Ans:-The PCM uses all of these inputs to calculate air fuel ratio and speed control EXCEPT: ©GRACEAMELIA 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH OCTOBER 2024 Page 4/5 A. An engine coolant temperature sensor. (ECT) B. An exhaust gas recirculation valve. (EGR) C. An intake air temperature sensor. (IAT) D. A throttle position sensor. (TPS) Both A and B - Ans:-Two technicians are discussing a turbocharged engine. Technician A says the wastegate is a component used to control boost pressure. Technician B says when opened, the wastegate diverts exhaust gas from the turbine wheel. Who is