Ase A1 Practice Questions |13 Questions| With Correct Answers.

An engine is making a knocking sound that changes with RPM, and the noise disappears while a cylinder is being tested during the cylinder balance test. Which of the following could be the cause? {Ans: A bad rod bearing will make a knocking sound with changes in RPM and disappear when the cylinder is shorted out.}Which of the following creates a flapping sound near the front of the engine? {Ans: A loose timing belt will cause a flapping sound near the front of the engine}Why you must disable the fuel injection system and ignition system when conducting an engine compression test? {Ans: The purpose for disconnecting the fuel injection and ignition systems is SAFETY related.}An engine noise sounds like a knock at the side of the engine that is louder when the engine is cold and goes away or is reduced when the engine reaches operating temperature. Which of the following is the MOST likely cause? {Ans: Piston slap is a knock heard at the side of the engine which is louder when the engine is cold and goes away or is reduced when the engine reaches operating temperature.}Is distilled water likely to be required when