$1.$ API Gravity is a measure of:

$-$ A$)$ Acidity of crude oil

$-$ B$)$ Density of crude oil relative to water

$-$ C$)$ Viscosity of crude oil

$-$ D$)$ Sulfur content of crude oil

$2.$ Which process is primarily used for removing salt from crude oil?

$-$ A$)$ Stabilization

$-$ B$)$ Fractional distillation

$-$ C$)$ Desalting

$-$ D$)$ Cracking

$3.$ The main goal of crude oil stabilization is to:

$-$ A$)$ Reduce sulfur content

$-$ B$)$ Remove water

$-$ C$)$ Remove volatile components

$-$ D$)$ Increase API gravity

$4.$ Fractional distillation of crude oil is based on differences in:

$-$ A$)$ Molecular weight

$-$ B$)$ Boiling points

$-$ C$)$ Solubility

$-$ D$)$ Density