Question 5Motor Plants - QMED

The correct answer is A) greater than the average exhaust manifold pressure. In a turbocharged diesel engine, the turbocharger uses the exhaust gases to drive a turbine, which in turn drives a compressor. This compressor increases the pressure in the intake manifold, resulting in a higher air pressure compared to the average exhaust manifold pressure. This increased air pressure helps to improve the engine's volumetric efficiency and power output. The other options are incorrect because: B) the intake manifold pressure is actually greater than the exhaust manifold pressure, C) the pressure is greater at the impeller than at the turbine wheel, and D) the pressure is greater at all engine speeds, not just reduced speeds.