Question

In Dual cycle, heat addition takes place ____________

(a) at Constant volume

(b) first at constant volume then at constant pressure

(c) constant pressure

(d) none of the mentioned

The question was posed to me in a national level competition.

My question is from Dual Cycle topic in chapter Air Standard Cycles and their Analysis of IC Engine

Answer 1

The correct option is (b) first at constant volume then at constant pressure

The explanation is: Since, Dual Cycle is a combination of Otto cycle and Diesel cycle, so in Dual cycle, generally heat addition takes place first at constant volume then at constant pressure.