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State whether the following is true or false.
The net calorific value of a fuel is always lower than its gross value.

  • A.False only at small scales
  • B.True
  • C.False
  • D.True only at large scales

Answer: B

The difference is the latent heat of the water formed from the hydrogen in the fuel, which the net value does not count as recovered. A fuel with no hydrogen would have equal values, which is very nearly the case for carbon monoxide.

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