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.

Which type of grease does not contain any soap base?

Calcium grease
Petroleum grease
Aluminum grease
Complex grease

The correct answer is: Petroleum grease

The correct choice refers to petroleum grease, which is distinct because it does not contain any soap base. Instead, petroleum grease is typically made from mineral oils thickened with non-soap additives. This characteristic allows for a smoother application and consistent performance under various conditions without the structural constraints that soap-based greases might impose. The other types of grease listed are soap-based. Calcium grease contains calcium soap as a thickening agent, which provides good water resistance. Aluminum grease uses an aluminum soap base, making it effective for high-temperature applications. Complex grease involves advanced thickening agents (often a combination of soaps) to enhance performance in severe conditions. The presence of soap in those greases contributes to their properties, such as consistency and lubrication capability, but petroleum grease stands apart by using a different formulation.