Question 231Motor Plants - Assistant Engineer
70% to passBefore starting a diesel engine that has an engine driven lube oil pump, the operator should_______________.
Aopen the bypass line
Bcut in the lube oil cooler
Cpressurize the lube oil system with the prelube pump
Dtop off the expansion tank
AI Explanation
The correct answer is C) pressurize the lube oil system with the prelube pump. Before starting a diesel engine with an engine-driven lube oil pump, the operator should pressurize the lube oil system using the prelube pump. This ensures that the engine bearings and other critical components are adequately lubricated before the engine starts, preventing potential damage from dry starts. The other options are incorrect because: A) opening the bypass line would depressurize the system, B) cutting in the lube oil cooler is not necessary for starting the engine, and D) topping off the expansion tank does not directly pressurize the lube oil system.
Related Questions
Q458:A propulsion engine, using the speed control circuit shown in the illustration, ... Q98:The rate of pressure rise during the period following fuel ignition in a diesel ... Q176:Diesel engine electric starting motors generally require heavier duty motors and... Q93:As engine RPM is increased from idle speed to full load speed, which of the cond... Q346:Which of the following statements represents the two major functions provided by...
Ready to test your knowledge?
Take a Motor Plants - Assistant Engineer Practice ExamOfficial Resources