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An inventor claims that a heat engine has the following specifications:
Developed = 50 kW
Fuel burned per hour = 3 kg
Heating value of fuel = 7500 kJ/kg
Temperature limit = 627°C and 27°C
Cost of fuel = Rs. 30/kg
Power the performance of his engine is
  • a)
    possible
  • b)
    not possible
  • c)
    economical
  • d)
    uneconomical
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
An inventor claims that a heat engine has the following specifications...

Since actual efficiency of the engine is greater than Carnot hence engine is not possible.
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Most Upvoted Answer
An inventor claims that a heat engine has the following specifications...
To determine the efficiency of the heat engine, we can use the formula:

Efficiency = (Developed energy / Fuel energy) * 100

First, let's determine the energy developed by the heat engine:

Developed energy = 50 kW

Next, let's determine the energy provided by the fuel burned per hour:

Energy provided by fuel = Fuel burned per hour * Heating value of fuel
Energy provided by fuel = 3 kg * 7500 kJ/kg
Energy provided by fuel = 22,500 kJ

Now, we can calculate the efficiency:

Efficiency = (50 kW / 22,500 kJ) * 100
Efficiency = 0.222 * 100
Efficiency = 22.2%

The efficiency of the heat engine is 22.2%.
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An inventor claims that a heat engine has the following specifications:Developed = 50 kWFuel burned per hour =3 kgHeating value of fuel = 7500 kJ/kgTemperature limit = 627°C and 27°CCost of fuel = Rs. 30/kgPower the performance of his engine isa)possibleb)not possiblec)economicald)uneconomicalCorrect answer is option 'B'. Can you explain this answer?
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An inventor claims that a heat engine has the following specifications:Developed = 50 kWFuel burned per hour =3 kgHeating value of fuel = 7500 kJ/kgTemperature limit = 627°C and 27°CCost of fuel = Rs. 30/kgPower the performance of his engine isa)possibleb)not possiblec)economicald)uneconomicalCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about An inventor claims that a heat engine has the following specifications:Developed = 50 kWFuel burned per hour =3 kgHeating value of fuel = 7500 kJ/kgTemperature limit = 627°C and 27°CCost of fuel = Rs. 30/kgPower the performance of his engine isa)possibleb)not possiblec)economicald)uneconomicalCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for An inventor claims that a heat engine has the following specifications:Developed = 50 kWFuel burned per hour =3 kgHeating value of fuel = 7500 kJ/kgTemperature limit = 627°C and 27°CCost of fuel = Rs. 30/kgPower the performance of his engine isa)possibleb)not possiblec)economicald)uneconomicalCorrect answer is option 'B'. Can you explain this answer?.
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