Question

Which is the correct advantage of solid fuels out of the given option?

(a) They have low ignition temperature

(b) They produce small amount of smoke

(c) They have higher calorific value

(d) They do not form any clinker

I had been asked this question during an interview.

My doubt stems from Artificial Solid Fuels & Liquid Fuels in section Steam Power Plant of Energy Engineering

Answer 1

Right answer is (a) They have low ignition temperature

The best explanation: They have low ignition temperature’. Ignition temperature is the minimum temperature at which a substance starts to burn. Different fuels have different ignition temperature. Some fuels have low ignition temperature and some have high ignition temperature. The fuels that have low ignition temperature are highly inflammable and burn quickly at the spark of fire. While some fuels that have high ignition temperature do not burn quickly. They require heating to burn.  For e.g., kerosene oil does not burn unless it is heated up to its ignition temperature.