Question 393Motor Plants - Assistant Engineer

The correct answer is D) At full load the intake manifold pressure is greater than the exhaust manifold pressure. This is correct because in a turbocharged four-stroke cycle diesel-generator, the turbocharger uses the exhaust gases to drive a turbine, which in turn drives a compressor to increase the pressure of the intake air. At full load, the engine requires more air, resulting in a higher intake manifold pressure compared to the exhaust manifold pressure. The other options are incorrect because: A) At zero load, the intake manifold pressure would be lower than the exhaust manifold pressure. B) At full load, the intake and exhaust manifold pressures are not equal due to the turbocharger's effect. C) At full load, the intake manifold pressure is actually greater than the exhaust manifold pressure, not less.