Preview Questions Chemical Researcher | Role Specific Skill

Question 1: What safety factor is commonly used when determining the pressure relief valve size in a chemical plant?

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The volume of chemical reactants

The rate of heat generation

The maximum expected pressure and safety margin

The minimum expected pressure in the system

Question 2: In the context of chemical analysis, what does "selectivity" refer to when choosing an analytical method?

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The method's ability to differentiate between similar compounds

The ability to measure multiple compounds at once

The amount of sample required for analysis

The speed at which the analysis can be conducted

Question 3: How do you account for potential sources of error in an experimental setup in chemical research?

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By not measuring the input variables too rigorously

By ignoring minor variations and focusing on the desired outcome

By conducting a thorough risk assessment and implementing controls for each variable

By assuming all experimental conditions remain constant

Question 4: What is the primary purpose of the "calibration curve" in quantitative chemical analysis?

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To determine the optimal temperature for the reaction

To correct for errors in instrument calibration

To establish the relationship between the instrument's response and the concentration of the analyte

To measure the purity of the sample

Question 5: What is the main goal of a quantitative risk assessment (QRA) in the chemical and petrochemical industry?

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To estimate the economic costs of chemical process operations

To analyze the market demand for new products

To assess the likelihood and impact of accidents or hazardous events, and to provide risk mitigation strategies

To determine the amount of product that can be produced within a given timeframe

Question 6: What is the principle behind using a refractive index detector in liquid chromatography?

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It measures the change in refractive index as a sample passes through a detector cell

It detects the mass-to-charge ratio of compounds as they elute

It uses ion exchange to separate analytes based on charge

It measures the concentration of analytes based on their interaction with light