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Oil and Gas Mock Interview

Question 16 of 30 for our Oil and Gas Mock Interview

Oil and Gas was updated by on March 21st, 2020. Learn more here.

Question 16 of 30

What is API gravity, and how is it calculated?

API gravity is American Institute Petroleum gravity. In short, it is a measure used to determine the weight of petroleum liquids compared to water. Here, the interviewer is not looking for you to give a math or physics lesson. They want to know that you are aware of basic terms and what they mean. Keep your response brief, and easy to follow.

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How to Answer: What is API gravity, and how is it calculated?

Advice and answer examples written specifically for an Oil and Gas job interview.

  • 16. What is API gravity, and how is it calculated?

      How to Answer

      API gravity is American Institute Petroleum gravity. In short, it is a measure used to determine the weight of petroleum liquids compared to water. Here, the interviewer is not looking for you to give a math or physics lesson. They want to know that you are aware of basic terms and what they mean. Keep your response brief, and easy to follow.

      1st Answer Example

      "I understand there is a specific formula used to find the gravity of petroleum liquids from the specific gravity, also known as SG. The formula is: API gravity = 141.5/SG - 131.5. I also know that is the API gravity is 10+, it is classified as a light oil which will float on water. An API gravity under ten will sink and then becomes categorized as heavy oil."

      2nd Answer Example

      "What I understand about API gravity is that it's a measurement that calculates the gravity of petroleum liquids compared to water. This calculation is how oil becomes classified from light, medium and heavy for example."