Preparation for final 4

Compounds that contain only carbon and hydrogen atoms are called 

• carbohydrogens 

• hydrocarbons

• carbides

• carbohydrates

What is the API gravity of a crude oil with a specific gravity of 0.86?

• 44 degrees API  

• 11 degrees API

• 22 degrees API 

• 33 degrees API

Flashpoint is defined as:

• the temperature at which the vapor above the oil will momentarily flash or explode 

• lowest temperature at which wax crystals begin to form by a gradual cooling under standard conditions 

• a petroleum fraction is the lowest temperature at which the oil will pour or flow when it is cooled without stirring under standard cooling conditions 

• the temperature at which liquid solidifies at 1 atm pressure

Octane number is

• a parameter defined to characterize antiknock characteristic of a fuel (gasoline and jet fuel) for spark ignition engines

• indicative of high-speed performance 

• The ignition delay period can be evaluated by the fuel characterization factor 

• for a hydrocarbon or a petroleum fraction is defined as the minimum temperature at which equal volumes of liquid hydrocarbon and aniline are miscible

is a mixture of hydrocarbons 

• Methane

• Brine

• Crude oil

• Water

The oil refining process: fractional distillation. The main equipment is a tall cylinder called

• fractional distillation column 

• fluid tanks

• condenser

• furnace

Which device is preferred when wellstreams have high gas-to-oil ratios, when wellstream flow is more or less constant, and when liquid volumes are insignificant? 

• Free water knockout

• Heaters-treaters

• Vertical separators

• Horizontal separators

Distillation can be used to separate a pure liquid from a mixture of liquids with different...

• masses

• viscosities

• boiling points 

• colours

Different hydrocarbons in crude oil have different boiling points, so they can be separated by fractional ___________.

• separation  

• osmosis

• partitioning 

• distillation

The fractionating column is _______ at the bottom and ________ at the top. 

• cool / hot  

• red / blue

• hot / cool

• NO ANSWER