Coal as a fuel may create a problem of molten ash which may short circuit the electrodes. Therefore, coal as a fuel is not a better option for MHDs. Oil or natural gas are always much better fuels for MHDs.
Question : The fuel that is used in modern submarines is
Option 1: Nuclear fuel
Option 2: Petrol
Option 3: Coal
Option 4: Diesel
Question : Which of the following contains a high content of lead?
Option 1: Coal
Option 2: Cooking gas
Option 3: High-octane fuel
Option 4: Low-octane fuel
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