Quiz #11: Hydraulic Oil Selection Team 6 Sep, 2024 Hydraulic Oil Selection Quiz 1. Which hydraulic oil characteristic is crucial for minimizing internal leakage in hydraulic systems? A) High viscosity index B) Low pour point C) Low flash point D) High specific gravity 2. What is the main advantage of using hydraulic oil with a high viscosity index (VI)? A) Improved oil color B) Better performance in a narrow temperature range C) Consistent viscosity across a wide temperature range D) Increased susceptibility to oxidation 3. Which hydraulic oil property is most important for protecting system components from wear in cold start conditions? A) High oxidation stability B) Low pour point C) High thermal conductivity D) High foam resistance 4. What is the primary consequence of selecting a hydraulic oil with a viscosity too high for the system? A) Increased system cooling B) Reduced pump efficiency and potential cavitation C) Improved energy efficiency D) Enhanced seal compatibility 5. How does the presence of zinc in hydraulic oil formulations typically affect the oil? A) Improves pour point B) Enhances anti-wear properties C) Reduces viscosity D) Increases oxidation stability 6. Which of the following is a key reason to select a biodegradable hydraulic oil? A) Lower cost B) Reduced risk of environmental pollution in case of a leak C) Higher viscosity D) Increased resistance to thermal degradation 7. When choosing hydraulic oil for a system exposed to wide temperature variations, which factor should be prioritized? A) High viscosity at low temperature B) Low viscosity at high temperature C) High viscosity index (VI) D) High demulsibility 8. Which hydraulic oil characteristic is most important to prevent foaming in systems with high turbulence? A) Low air release value B) High pour point C) Low viscosity index D) High specific gravity 9. Which property of hydraulic oil ensures good filtration performance and prevents filter clogging? A) High demulsibility B) High oxidation stability C) Low particle count and high cleanliness level D) High flash point 10. What is a common impact of water contamination in hydraulic oil? A) Improved lubrication properties B) Enhanced thermal stability C) Degradation of additive effectiveness and increased risk of corrosion D) Increased viscosity Submit
