The self-ignition temperature of gasoline is approximately in the range of___________________?
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Answer: E. more than 500°C.
Explanation
Gasoline has a relatively high self-ignition temperature, typically exceeding 500°C to prevent pre-ignition in engines. High auto-ignition thresholds ensure that gasoline vapor-air mixtures do not spontaneously detonate under high compression. Internal combustion engines rely on gasoline's high self-ignition temperature to control combustion timing via spark plugs. Self-ignition temperature is the minimum thermal point at which a substance ignites spontaneously without an external spark. Fuel chemistry dictates auto-ignition resistance, which is measured commercially using octane rating scales. Preventing uncontrolled auto-ignition prevents destructive engine knocking phenomena in spark-ignition engines.
Automotive engineers design high-compression engines requiring specialized fuel blends with high auto-ignition resistance. Fuel storage and handling safety protocols account for the high self-ignition temperature of commercial gasoline. Understanding fuel ignition properties is essential for preventing accidental fires in automotive service environments. A temperature of 150°C is far too low and would cause immediate pre-ignition in standard automobile engines. A self-ignition threshold of 240°C would lead to severe engine knocking and uncontrolled fuel detonation. A threshold of 370°C remains too low for modern high-compression gasoline engine operating requirements.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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