Question

Crude oil denser than pure water has the API gravity:

• A. less than 10°
• B. between 10° and 20°
• C. between 20° and 60°
• D. more than 60°

Hint:

API gravity is inversely related to the density of oil. Crude oil denser than water has a lower API gravity, typically below 10°.

Answer 1

The Correct Option is A

API gravity is a measure of the density of crude oil compared to water. It is defined by the formula: \[ {API Gravity} = \frac{141.5}{{Specific Gravity}} - 131.5 \] For crude oil denser than pure water (specific gravity greater than 1), the API gravity will be less than 10°.
- Option (A) is correct because if the oil is denser than water, the API gravity will be less than 10°.
- Option (B) and Option (C) would apply to less dense crude oils.
- Option (D) applies to lighter oils with API gravity greater than 60°.
Thus, the correct answer is option (A).