AG Mechanics CDE Practice Exam

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

Prepare effectively for the AG Mechanics CDE exam with our engaging quiz. Featuring multiple-choice questions and detailed explanations, you can increase your knowledge of agricultural mechanics and develop the skills necessary for success in the competition.

Practice this question and more.

Which of the following grades of oil is the thickest?

5W-20
10W-30
10W-40
5W-30

The correct answer is: 10W-40

The correct answer is C, 10W-40, because this grade of oil is thicker compared to the other options listed. The first number, in this case, 10W, represents the viscosity of the oil when it is cold. The higher the number, the thicker the oil. The second number, 40, represents the viscosity of the oil when it is at operating temperature. In this case, 10W-40 is thicker compared to 5W-20, 10W-30, and 5W-30 based on the second number being higher.