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:

This question was previously asked in

SSC JE ME Previous Paper 10 (Held on: 11 December 2020 Morning)

Option 2 : 21

ST 1: Logical reasoning

5265

20 Questions
20 Marks
20 Mins

__Concept:__

By Principle of conservation of mass we can have

m_{a} + m_{f} = m_{e}

where, m_{a} → mass flow rate of air into the cylinder, m_{f} → mass flow rate of fuel injected into the cylinder and m_{e} → mass flow rate of exhaust gas.

__Calculation:__

__Given:__

m_{f} = 1 g/s, air-fuel ratio → 20, therefore ma = 20 g/s

now, applying the conservation of mass we have

**m _{e}**