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A good automobile fuel, in addition to having high calorific value, should have

  • A.High ignition temperature
  • B.High viscosity
  • C.Low ignition temperature
  • D.Moderate ignition temperature

Answer: D

A good automobile fuel should have, in addition to a high calorific value, a moderate ignition temperature. If the ignition temperature is too high the fuel will not ignite readily, and if it is too low the fuel can ignite before the spark and cause knocking and is unsafe to store. High viscosity is undesirable because it makes the fuel difficult to pump and atomise, so a moderate ignition temperature is the property needed.

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