Question 140Motor Plants - QMED

The correct answer is A) restricted turbocharger air intake. The reasoning is that a diesel engine relies on a steady supply of air to the turbocharger in order to maintain sufficient power output. If the air intake to the turbocharger becomes restricted, the engine will lose power due to the reduced air supply. This is a common failure mode for diesel engines. The other answer choices are incorrect because they do not directly result in a sudden loss of engine power. An oil leak into the turbocharger (B) may cause damage over time but would not lead to an immediate power loss. A dribbling injector (C) or low fuel viscosity (D) would affect fuel delivery but not the air supply to the engine.