Oilers/Plant Tenders (HHC) Civil Service Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the Oilers/Plant Tenders Exam with our comprehensive quiz. Utilize flashcards and multiple choice questions with hints and explanations to excel in your civil service test. Start your preparation now!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

In a stationary diesel engine, a grade of lube oil is selected based PRINCIPALLY on ________

Cost-effectiveness
Minimizing carbon deposits between rings
Accessibility of the oil
Environmental safety

The correct answer is: Minimizing carbon deposits between rings

The selection of a lube oil grade for a stationary diesel engine primarily focuses on minimizing carbon deposits between the piston rings. Diesel engines operate under high temperatures and pressures, leading to incomplete combustion and the potential formation of carbon deposits. These deposits can accumulate in critical areas, such as between the piston rings, which can hinder the engine's performance, increase wear, and reduce efficiency. Choosing the right lube oil helps in maintaining the engine's cleanliness by promoting better combustion and preventing the formation of harmful deposits. Proper lubrication not only protects the engine components but also enhances efficiency and longevity. Therefore, a lube oil grade that effectively minimizes carbon deposits is crucial for optimal operation and maintenance of a stationary diesel engine. While cost-effectiveness, accessibility, and environmental safety are important considerations in the broader context of oil selection, the principal focus remains on ensuring the engine operates smoothly and efficiently without the adverse effects of carbon buildup.