Question 12 1 pts Technician A says mechanically adjusted valves have some extra clearance when the engine is warm. Technician B says valve lash will decrease as a valve face and valve seat wear. Who is right? A only B only Both A and B Neither A nor B Question 13 1 pts Technician A says on most pushrod engines, lifters have a concave face. Technician B says pushrods are stationary when the engine is running. Who is correct? Technician A Technician B O Both technicians Neither technician