City Guilds Model Questions Vol1 2020 Engineering Question 50
Practice objective / multiple choice question 50 from the 2020 City Guilds Model Questions Vol1 Engineering examination.
A heat engine operates between a high‑temperature reservoir at \(500^{\circ}\text{C}\) and a low‑temperature reservoir at \(30^{\circ}\text{C}\). Its actual thermal efficiency is 70 % of the Carnot efficiency. The engine delivers a mechanical power output of \(150\) kW. (a) Determine the rate of heat extracted from the high‑temperature reservoir (in kW). (b) Determine the rate of heat rejected to the low‑temperature reservoir (in kW). (c) If the fuel used has a heating value of \(42\) MJ kg⁻¹ and the combustion process is 85 % efficient, calculate the required fuel mass flow rate in kg s⁻¹ (give the answer to three significant figures).
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About This Question
This is City Guilds Model Questions Vol1 2020 Engineering Question 50. It is one of the objective questions from the 2020 City Guilds Model Questions Vol1 Engineering examination.
Difficulty level: Medium .
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