WorksheetsTOPIC 1: PRIMARY RAW MATERIALS FOR PETROCHEMICAL
Total questions: 20
Worksheet time: 10mins
What is the primary component of natural gas?
Ethane
Methane
Propane
Butane
What is non-associated natural gas?
Natural gas found dissolved in crude oil
Natural gas found in reservoirs without crude oil
Natural gas mixed with impurities
Natural gas used for residential heating
Which hydrocarbon is often separated from natural gas for the production of ethylene?
Methane
Ethane
Butane
Propane
Why is mercaptan added to natural gas?
To increase its heating value
To make it safe for transportation
To give it a detectable smell for safety
To neutralize impurities
What is the purpose of acid gas treatment in natural gas processing?
To increase the flammability of natural gas
To remove hydrogen sulfide and carbon dioxide
To recover heavier hydrocarbons
To improve the combustion efficiency
Which of the following is a consequence of using natural gas with high impurities in industry?
Increased efficiency
Reduced equipment corrosion
Higher treatment costs
Enhanced pipeline efficiency
What method is used to remove moisture from natural gas to prevent hydrate formation?
Physical absorption
Glycol treatment
Chemical absorption
Distillation
Which process involves using molecular sieves to remove impurities from natural gas?
Physical absorption
Physical adsorption
Chemical absorption
Cracking
Which hydrocarbons in natural gas are commonly sold as liquefied petroleum gas (LPG)?
Methane and ethane
Ethane and propane
Propane and butane
Butane and methane
What is the main reason for removing carbon dioxide from natural gas?
To prevent equipment corrosion
To increase the natural gas's density
To prevent solidification during transportation
To improve its odor
What is crude oil primarily composed of?
Oxygen compounds
Hydrocarbons
Inorganic salts
Organometallic compounds
Which of the following is NOT a common class of hydrocarbons found in crude oil?
Alkanes
Alkenes
Aromatics
Cycloalkanes
What is the most common method used to separate crude oil into different fractions?
Cracking
Distillation
Adsorption
Desalination
Which of the following impurities in crude oil can cause corrosion and pollution during refining?
Hydrocarbons
Sulfur compounds
Carboxylic acids
Paraffins
What is the API gravity range for conventional light crude oil?
10–20
20–35
35–45
Above 45
What is the main purpose of determining the sulfur content in crude oil?
To assess the fuel’s calorific value
To determine the type of treatment needed during refining
To classify the oil based on its density
To improve its combustion efficiency
Why is crude oil with high salt content undesirable?
It has low heating value
It leads to corrosion during the refining process
It contains high levels of paraffins
It is difficult to transport
What property of crude oil is indicated by its pour point?
The amount of impurities
The oil's ability to flow at low temperatures
The calorific value of the oil
The density of the oil
What type of oxygen compounds in crude oil are commercially important and can be extracted using caustic solutions?
Ketones
Naphthenic acids
Esters
Alcohols
Which metallic impurities in crude oil can form emulsifying compounds, making processing difficult?
Sodium and calcium
Nickel and vanadium
Magnesium and iron
Aluminium and silicon
