# Question

A four-stroke engine runs on the Otto cycle. It delivers 150 hp at 3600 rpm.

(a) How many cycles are in 1 min?

(b) If the thermal efficiency of the engine is 20%, what is the heat input per minute?

(c) How much heat is wasted (per minute) to the environment?

(a) How many cycles are in 1 min?

(b) If the thermal efficiency of the engine is 20%, what is the heat input per minute?

(c) How much heat is wasted (per minute) to the environment?

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