$28.$ Which petroleum product is most commonly used as a domestic heating fuel?

A$)$ Naphtha

B$)$ Kerosene

C$)$ Lubricant

D$)$ Diesel oil

$29.$ The octane rating of gasoline indicates its:

A$)$ Viscosity

B$)$ Ability to resist knocking

C$)$ Sulfur content

D$)$ Density

$30.$ What is the main use of petroleum coke?

A$)$ As a fuel in industrial furnaces

B$)$ In the production of batteries

C$)$ As a lubricant in machinery

D$)$ In food processing

$31.$ Aviation turbine fuel $($jet fuel$)$ is most similar to:

A$)$ Motor gasoline

B$)$ Kerosene

C$)$ Diesel oil

D$)$ Naphtha