Ase A1 - Practice Test (Section A) Study Guide Questions And Correct Answers

60. A high-pitched squealing noise is heard during hard acceleration. This may be the cause of: intake manifold leak the choke stuck closed fuel system leak small leak in exhaust manifold {Ans: small leak in exhaust manifold -intake manifold leak causes a high-pitched whistle at idle and low speeds -carb choke stuck closed will not cause a high-pitched whistle -fuel system leak normally would not cause a noise}A36. a cylinder balance test is being performed on an engine to determine which cylinder is causing a miss. Tech A says that when the faulty cylinder is disabled, engine rpm will drop more than for the other cylinders. Tech B says disabling the faulty cylinder will cause the engine to stall A B Both Neither {Ans: Neither the faulty cylinder will not cause the engine to stall, neither will it cause the engine to drop in RPM since it is faulty.}61. a heavy thumping noise occurs with the engine idling, but the oil pressure is normal. this may be caused by: worn pistons and cylinders loose flywheel bolts worm main bearings loose camshaft bearings {Ans: loose flywheel bolts -worn pistons and cylinders would cause a thumping noise during acceleration