Pour point of fuel oil is the

• A. Indicated by 90% distillation temperature i.e., when 90% of sample oil has distilled off
• B. Minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame
• C. Temperature at which it solidifies or congeals
• D. It catches fire without external aid

Answer: (C)