Heavy Duty Equipment Technician Red Seal Exam Prep · Question
What is the primary consequence of using hydraulic fluid with a viscosity that is too low?
Low viscosity fluid provides a thinner lubricating film, leading to increased metal-to-metal contact and wear, as well as higher internal leakage (slippage) acr
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Question: What is the primary consequence of using hydraulic fluid with a viscosity that is too low?
Answer options:
- Reduced system operating temperature
- Increased pump efficiency ✅ Increased internal leakage and wear
- Improved cavitation resistance
Correct answer: Increased internal leakage and wear
Explanation: Low viscosity fluid provides a thinner lubricating film, leading to increased metal-to-metal contact and wear, as well as higher internal leakage (slippage) across component clearances, reducing efficiency.
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