In fuel property determination, Reid vapour pressure test is used for measuring
Options:
(A) Volatility
(B) Viscosity
(C) Sulphur content
(D) Carbon residue
Official Answer Key:
A
Step-by-Step Solution & Explanation
• Reid Vapour Pressure (RVP) is a standardized test (ASTM D323) that measures the vapour pressure exerted by a fuel at 37.8 °C (100 °F) in a sealed bomb.
• It directly quantifies how readily a fuel evaporates — i.e., its volatility — which governs cold-starting, vapour lock tendency, and evaporative emissions.
• Viscosity, sulphur content and carbon residue are measured by entirely different standardized tests (viscometer, lamp/bomb sulphur tests, Conradson carbon residue test respectively).
• Final Answer: (A) Volatility
Practice This in Real CBT Exam Interface
Test yourself with the official TCS-iON palette, virtual calculator, and immediate performance analytics.