Question

For which of the following correction we should use a larger sample mass?

(a) Fuse wire correction

(b) Cotton thread correction

(c) Cooling correction

(d) Acid correction

The question was asked in a job interview.

My question comes from Determination of Calorific Value of Solid and Non-Volatile Liquid Fuels in section Fuels and Combustion of Engineering Chemistry II

Answer 1

Right answer is (b) Cotton thread correction

For explanation I would say: This is because the cotton thread correction obtained is very small, due to which for small masses its value is negligible, therefore for calculating these corrections we should use larger mass sample.