Question Bank • QB_FP_137 MCQ • 1 Mark

Section 3: Farm Power

Farm Power

Subtopic: Fuels and combustion

Question Statement:

The lowest temperature at which a petroleum fuel gives off sufficient vapor to ignite momentarily (flash) when an open flame is brought near its surface is defined as its:

Options:

  • (A) Fire point
  • (B) Flash point
  • (C) Pour point
  • (D) Cloud point

Answer Key:

B

Step-by-Step Solution & Explanation

The flash point is the lowest temperature of the liquid fuel at which it forms a flammable vapor mixture with air near its surface that momentarily catches fire (flashes) on ignition. The fire point is slightly higher (at which combustion continues for $\ge 5\text{ s}$).
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