Which risk increases when engine oil operates below its optimal viscosity range?

💡 Explanation

Increased hydrodynamic bearing surface wear occurs when oil viscosity is too low, because boundary lubrication replaces hydrodynamic lubrication. When viscosity decreases, the oil film becomes thinner, decreasing the bearing’s load-carrying capacity; therefore wear increases, rather than being reduced, as the lack of viscous support enables surface-to-surface contact.

• Which mechanism accelerates signal propagation in myelinated axons?
• Which behaviour prevents electrical excitation when incident photons match valence-conduction band gap energies in silicon?
• Which consequence results when rapid cooling of molten silicon bypasses nucleation?
• Which outcome increases when insufficient surface area limits catalysts during chemical production?
• Which outcome regarding nuclear waste occurs when spent nuclear fuel rods are reprocessed to separate isotopes?
• Which consequence primarily results when Arrhenius constant decreases?