$25.$ EFV distillation differs from TBP distillation in that EFV:

$-$ A$)$ Is used exclusively for heavy oils

$-$ B$)$ Measures only the initial boiling point

$-$ C$)$ Simulates a single stage vapor$-$liquid equilibrium

$-$ D$)$ Provides a detailed boiling curve across multiple stages

$26.$ The primary purpose of ASTM distillation in the oil industry is to:

$-$ A$)$ Classify crude oils based on their API gravity

$-$ B$)$ Provide a quick estimation of the boiling range of petroleum products

$-$ C$)$ Measure the acidity and sulfur content of crude oil

$-$ D$)$ Determine the exact molecular composition of crude oil

$27.$ Which process is NOT directly involved in the separation of crude oil into fractions?

$-$ A$)$ Catalytic cracking

$-$ B$)$ Atmospheric distillation

$-$ C$)$ Vacuum distillation

$-$ D$)$ Desalting

$28.$ The main advantage of using a vacuum distillation unit over atmospheric distillation is:

$-$ A$)$ The ability to process crude oil with high acidity

$-$ B$)$ The reduced energy consumption due to lower operating temperatures

$-$ C$)$ The increased capacity for sulfur removal

$-$ D$)$ The production of lighter hydrocarbons