Question:
Reid vapour pressure test is conducted to check
Reid vapour pressure test is conducted to check
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Vapor pressure is a thermodynamic measure of vaporization rate. Hence, any vapor pressure test evaluates the volatility of the liquid.
Updated On: Jul 7, 2026
- Corrosiveness of fuel
- Volatility of fuel
- Sulphur content of fuel
- Knocking characteristics of fuel
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Concept:
Fuel volatility refers to the ease with which a liquid fuel evaporates at specific operating temperatures. It is a critical parameter for engine starting, warm-up, and vapor lock prevention.
Step 3: Detailed Explanation:
The Reid Vapor Pressure (RVP) test is a standard laboratory method (ASTM D323) used to measure the vapor pressure of volatile crude oil and non-viscous petroleum products (specifically gasoline) at a standard temperature of \(37.8 ^\circ\text{C}\) (\(100 ^\circ\text{F}\)).
A high RVP value indicates a highly volatile fuel that vaporizes easily, which is desirable for cold-weather starting but can cause vapor lock in warm conditions.
Thus, the Reid vapor pressure test directly checks fuel volatility.
Step 4: Final Answer:
The correct option is 2, which corresponds to Volatility of fuel.
Fuel volatility refers to the ease with which a liquid fuel evaporates at specific operating temperatures. It is a critical parameter for engine starting, warm-up, and vapor lock prevention.
Step 3: Detailed Explanation:
The Reid Vapor Pressure (RVP) test is a standard laboratory method (ASTM D323) used to measure the vapor pressure of volatile crude oil and non-viscous petroleum products (specifically gasoline) at a standard temperature of \(37.8 ^\circ\text{C}\) (\(100 ^\circ\text{F}\)).
A high RVP value indicates a highly volatile fuel that vaporizes easily, which is desirable for cold-weather starting but can cause vapor lock in warm conditions.
Thus, the Reid vapor pressure test directly checks fuel volatility.
Step 4: Final Answer:
The correct option is 2, which corresponds to Volatility of fuel.
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