🔍 Key Concepts

• Relationship between centistokes (cSt) and the flow characteristics of a liquid • Difference between how easily a fuel flows vs. how much energy it contains • Common lab measurements for fuel thickness vs. fuel weight

💭 Think About

• When you see units like centistokes (cSt), are they usually associated with how thick or thin a liquid is, how heavy it is, or how much energy it releases when burned? • Which property would most affect how well fuel can be pumped through lines and injected into an engine—its thickness, its weight per volume, its energy content, or its ignition quality? • Think about marine fuel oil tests: which test uses centistokes (cSt) on a spec sheet—flow behavior, density, energy, or ignition rating?

✅ Before You Answer

• Check which property is described as a liquid’s resistance to flow. • Confirm that heating value is normally expressed in units like BTU/lb or kJ/kg, not in centistokes. • Remember that density is usually measured in kg/m³ or specific gravity, and cetane rating is dimensionless (no units like cSt).