Viscosity refers to what property?

Viscosity refers to what property?

• A. Boiling point of a liquid
• B. Density of a liquid
• C. Thickness of a liquid
• D. Flash point of a liquid

Answer: (C)

Viscosity is the measure of a liquid's resistance to flow, i.e., how thick or thin it is. A liquid with high viscosity flows slowly, while one with low viscosity flows easily. That’s why this property is described as thickness. Boiling point, density, and flash point describe other characteristics: boiling point is the temperature at which a liquid boils, density is mass per volume, and the flash point is the lowest temperature at which enough vapor can ignite. Viscosity also changes with temperature—raising temperature lowers viscosity and makes liquids flow more easily. In practical terms, viscosity affects lubrication, fuel flow, and hydraulic performance.

Viscosity is the measure of a liquid's resistance to flow, i.e., how thick or thin it is. A liquid with high viscosity flows slowly, while one with low viscosity flows easily. That’s why this property is described as thickness. Boiling point, density, and flash point describe other characteristics: boiling point is the temperature at which a liquid boils, density is mass per volume, and the flash point is the lowest temperature at which enough vapor can ignite. Viscosity also changes with temperature—raising temperature lowers viscosity and makes liquids flow more easily. In practical terms, viscosity affects lubrication, fuel flow, and hydraulic performance.