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When measuring piston ring gap clearance and installing piston rings, Tech A says that the ring gaps should be positioned directly below each other on the piston. Tech B says that if the ring gap is excessive, the cylinder may have excessive wear. Who is correct? A only B only Both A and B Neither A nor B {Ans: B only}When a piston is positioned at TDC on the exhaust stroke, and the valve timing is correct: `The intake valve should be wide open `The exhaust valve should be opening `The intake valve should be opening `The exhaust valve should be closed {Ans: The intake valve should be opening}An engine has excessive oil consumption and the exhaust contains blue smoke especially during deceleration. Tech A recommends checking the valve stem-to-guide clearance and valve stem seals. Tech B recommends pressure testing the cooling system. Who is correct? A only B only Both A and B Neither A nor B {Ans: A only}A customer complains about lacks of heat in the vehicle interior. The coolant level and thermostat are proven to be satisfactory. Tech A says that there may be air in the cooling system and a cooling system