38. In order to perform a proper compression test, all of the following conditions should be mel EXCEPT: A the throttle blades should be held wide open 40. All of the following could cause an engine to ping or detonate EXCEPT. B. the battery should be fully charged C. the engine should be at operating temperature A. a faulty EGR valve D. only the spark plug for the cylinder to be 3. retarded ignition timing fested should be removed C. excessive machining of the cylinder head U. using fuel with too low of an octane rating A. the throttle blades should be held wide open O A. a faulty EGR valve B. The battery should be fully charged. O B. retarded ignition timing O C. the engine should be at operation temperature O C. excessive machining of the cylinder head O D. only the spark plug for the cylinder to be tested should be removed O D. using fuel with low octane rating Question 39 Question 41 pts 39. A single rod bearing shows excessive wear, but the 1. Technician A says that a twisted connecting rod rest show normal wear. Technician A says this could be would cause a slanted wear pattern on the side of a due to an ofloi-round connecting fod bore. Technician pistori Technician B says that a bent connecting rod B says that this could be due to an obstruction in the would cause the red bearing inserts to have more crankshaft oh passage's; that supplies the bearing. Who wear on one side. Who is right? is right? A. Technician A only A Technician A only B. Technician B only B. Technician B only C. Both A and B C. Both A and B D. Neither A or S D. Neither A orB O A. Technician A only O A. Technician A only B. Technician B only O B. Technician B only C. Both A and B O C. Both A and B O D. Neither A nor B O D. Neither A nor B Question 42 Question 40 1 pts