1.

If mf is the mass of fuel supplied per kg of air in one second, then the mass of gases leaving the nozzle of turbojet will be(a) (1 – mf ) kg/s(b) \(\cfrac{1}{(1+m_f)}kg/s\) (c) (1 + mf ) kg/s(d) \(\cfrac{1}{(1-m_f)}kg/s\)

Answer»

(c) (1 + mf ) kg/s

For turbojet engine, total mass of gases coming out will be sum of fuel and air supplied. 

Hence, mass flow = (1 + mf ) kg/s



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