AG Mechanics CDE Practice Exam

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Prepare for the AG Mechanics CDE Exam. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

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The "W" in 10W-30 stands for:

Water
Winter
Weight
Work

The correct answer is: Winter

The "W" in 10W-30 stands for winter. This viscosity grade is commonly used in engine oils to indicate their flow characteristics at low temperatures. The number before the "W" (10 in this case) represents the oil's viscosity in cold weather conditions, with lower numbers flowing better in cold weather. The number after the hyphen (30 in this case) represents the oil's viscosity at operating temperatures, with higher numbers indicating a thicker oil. In this context, the "W" specifically signifies the oil's performance in winter conditions, making option B the correct answer.