Question 189Motor Plants - Assistant Engineer70% to pass
In a medium-speed marine propulsion engine equipped with direct admission air starting valves, the cylinders without air starting valves fire first because the _______________.
AI Explanation
The correct answer is D) the cylinders are not chilled by the expansion of the starting air.
In a medium-speed marine propulsion engine equipped with direct admission air starting valves, the cylinders without air starting valves fire first because the lack of chilling from the expansion of the starting air allows these cylinders to reach the necessary temperature and pressure for combustion more quickly during the starting process. The other answer choices are incorrect because they do not directly address the reason for the specific firing order of the cylinders in this type of engine.
Related Questions
#187 In a direct cylinder admission air starting system, once the engine begins to fire, the air starting check valve illustrated, is closed by_______________. Illustration MO-0107 #188 When an air started, four-stroke cycle diesel engine is being cranked over, the starting air is admitted to each cylinder during the beginning of its_______________.#190 An oil-operated, direct reversing mechanism on a large, low-speed, main propulsion diesel engine, can serve to_______________. #191 In order to reverse the rotation of a two-stroke cycle loop scavenged, direct reversing, propulsion diesel engine, the cam positions must be changed for the_______________. #192 In addition to the main starting air compressor, another air compressor, driven by a separate power source, is installed to _______________.