E4FD32Mak2
Chemical Engineering Concepts Quiz
Test your knowledge of chemical engineering principles with this comprehensive quiz! Designed for students, professionals, and enthusiasts, it covers a range of topics within distillation, cracking processes, and refinery operations.
Each question is crafted to challenge your understanding and application of chemical engineering concepts:
- Distillation techniques
- Catalytic processes
- Natural gas properties
- Refinery operations
Choose the false statement below.
At full reflux there is no distillation product.
Equilibrium Flash Vaporization maximizes the reflux ratio to reach equilibrium.
Adding steam to a distillation column improves fractionation.
Increasing the number of stages in a distillation column improves separation of the distillate components.
Increasing reflux ratio in a distillation column improves separation.
Choose one of the statements below that is most likely a false statement.
Carbenium ions can be made on Lewis acid sites on a catalyst.
Carbonium ions are made by adding protons to alkanes.
Carbonium ions can be made made on Lewis acid sites on a catalyst.
Carbonium ions can be made on Bronsted acid cites on a catalyst.
Carbenium ions can be made on Bronsted acid sites.
Which pair of the following pairs of processes uses a similar concept for providing heat to carry out the desired cracking reactions?
Delayed Coking and Fluid Catalytic Cracking
Visbreaking and Fluid Coking
Catalytic Dewaxing and Fluid Coking
Fluid Coking and Thermal Cracking
Fluid Coking and Fluid Catalytic Cracking
Choose one of the statements below that would best complete the following sentence. Carbenium ions are made by..
Subtracting hydride ions from olefins.
Abstracting protons from olefins.
Adding protons to olefins.
Adding hydride ions to naphthenes.
Adding electrons to alkanes.
Mark the false statement below.
Alkylation requires highly concentrated acid as catalyst.
Alkylation is the opposite of cracking considering the change in molecular size during the process.
Alkylate has a high aromatic hydrocarbon content.
Alkylate is currently favored over reformate in the U.S. Refineries because of environmental regulations on gasoline.
Alkylate has a higher octane number than polymerate.
One of the statements given below is true. Mark the true statement.
Catalytic dewaxing is a finishing process.
Catalytic dewaxing increases the ratio i-paraffins/n-paraffins in the lubricating oil base stock produced in the process.
Hydrogen is added during solvent dewaxing to prevent disproportionation.
Wax contains long-chain iso-paraffins.
Solvent dewaxing does not require refrigeration.
Which sequence below best represents the correct order of forward flow in processes that takes place in the following refinery units: distillation, hydrotreating, reforming, naphtha fractionation.
Distillation,naphtha fractionation, reforming, hydrotreating
Distillation, hydrotreating, reforming, naphtha fractionation
Distillation,reforming, naphtha fractionation, hydrotreating
Distillation, reforming, hydrotreating, naphtha fractionation
Distillation,naphtha fractionation, hydrotreating, reforming
Choose one of the statements below that would best complete the following sentence. Thermal cracking is carried out in two different reactors because..
One reactor could have a fixed-bed configuration.
Thermal reactivity of n-paraffins depends on the chain length.
One reactor could have a moving-bed configuration.
It is a continuous process.
It is a semi-continuous process.
One of the statements below is a false statement. Mark the false statement.
Raw natural gas contains water and diluents.
Some raw natural gas streams may contain helium.
Shale gas is produced to obtain Natural Gas Liquids as the principal product.
Natural gas hydrates (methane trapped in ice) could plug production or processing pipelines.
Natural gas can be found in oil wells.
Choose one of the statements given below that most correctly completes the following sentence. To obtain the highest yield of alkanes in a thermal cracking process, the refiners would choose to run the reactor at relatively..
High flow rates.
High temperature.
Low space velocity.
High pressure.
Low pressure.
Two of the statements listed below about the Modified Claus Process are false. Mark the two false statements.
Condenser outlets must be maintained at temperatures above the melting point of sulfur
Ammonia that may be present in the feed to the Modified Claus Process must be completely destroyed in the converter reactor.
The effluent gas from the burner reactor should be kept at a temperature above the dew point of elemental sulfur.
Burner reactor does not produce any elemental sulfur.
The converter effluent is introduced into a condenser unit to obtain elemental sulfur as a liquid product.
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