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Determine the amount of propellant trapped in pipe, fittings, and valve corners and lost by other means, if the initial mass of the propellant was M and it had an expulsion efficiency of 97%.

Determine the amount of propellant trapped in pipe, fittings, and valve corners and lost by other means, if the initial mass of the propellant was M and it had an expulsion efficiency of 97%. Correct Answer 0.03M

Expulsion efficiency is the ratio of the amount of propellant available or expelled to the amount of propellant initially present in the tank. So, 0.97 = mexpel/M Then mtrapped = M – Mexpel = 0.03M.

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