SSC JE Mechanical Engineering 11 Oct 2020 Shift 1 Papers

Question : 153 of 200

Marks: +1, -0

If an IC engine consumes fuel at the rate of 1 g/s and if the air-fuel ratio for it is 20, the mass flow rate of exhaust gas in g/s is:

Solution:

m_f

= 1 g/s, air-fuel ratio → 20, therefore

m_a

= 20 g/s
now, applying the conservation of mass we have

m_e = 20 + 1 = 21

g/s

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