What is the Reid vapor pressure of a grade B...

🔍 Key Concepts

• Reid vapor pressure (RVP) ranges used to distinguish Grade A, B, and C flammable liquids on tank vessels • How Grade B products compare to Grade A (very high vapor pressure) and Grade C (lower vapor pressure) in terms of volatility • The relationship between flash point and cargo grade classifications in tanker regulations

💭 Think About

• First, focus only on the vapor pressure values: which choice describes a middle range vapor pressure – higher than typical gasoline-like products of lower grade, but not the highest class? • Think about how Grade A products are defined: do they have the highest RVP or just moderate RVP? Then, where would Grade B logically fall in relation to that? • After identifying which answer best matches the RVP range for Grade B, use the flash point listed with that choice as a cross-check: does that flash point make sense for a more volatile, higher-hazard flammable liquid?

✅ Before You Answer

• Confirm from your notes or regulations the numerical RVP range that defines Grade B products (look for “more than __ psia but less than __ psia”). • Check whether Grade B cargoes are associated with a low flash point (more flammable) or a high flash point (less flammable). • Eliminate any option where the RVP matches Grade A (very highest RVP) or Grade C (lower RVP) definitions rather than the Grade B range.

What is the Reid vapor pressure of a grade B product?

7 psia and a flash point of 80° F

above 14 psia

9 1/2 psia and a flash point of 95° F

more than 8 1/2 psia but less than 14 psia and a flash point of 72° F

🔍 Key Concepts

💭 Think About

✅ Before You Answer