The turbine in a steam power takes steam from a boiler at 427°C and exhaust into a low temperature reservoir at 77°C. What is the maximum possible efficiency?
Correct answer: D. 50%
- A. 10%
- B. 20%
- C. 30%
- D. 50%
- E. 70%
Explanation
The maximum theoretical efficiency of the system is the one corresponding to the efficiency of a Carnot cycle operating between the same temperatures of the system:η=1−Tc /ThThere Tc and Th are the cold and hot temperatures, respectively.In our problem, Tc =350K and Th =700KTherefore, the maximum theoretical efficiency isη=1−350/700 = 0.50 × 100 = 50%
Last updated
About Nuclear Physics
Atomic nuclei contain protons and neutrons, with nuclear size, mass defect and binding energy describing their stability. The work covers alpha, beta and gamma decay, decay equations, half-life and decay rate, along with radiation safety and medical applications such as imaging, radiotherapy and tracers.
Practise Nuclear Physics
1,254 free Nuclear Physics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Physics questions like this
Physics is on 13 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.